CN111169607B - Circulating reverberation water pool for measuring radiation noise of underwater vehicle - Google Patents
Circulating reverberation water pool for measuring radiation noise of underwater vehicle Download PDFInfo
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- CN111169607B CN111169607B CN202010022252.XA CN202010022252A CN111169607B CN 111169607 B CN111169607 B CN 111169607B CN 202010022252 A CN202010022252 A CN 202010022252A CN 111169607 B CN111169607 B CN 111169607B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
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Abstract
The invention provides a circulating reverberation water pool for measuring radiation noise of an underwater vehicle. The device comprises a reverberation water tank and a water circulation system consisting of a pipeline and a water pump, wherein the reverberation water tank consists of a working section and a measuring section, a water inlet and a water outlet of the water circulation system are arranged at the working section, flow guide devices are respectively arranged at the water inlet and the water outlet, a model mounting platform is positioned at the center of the working section, and a flow stabilizing device is arranged between the water inlet flow guide devices and the model mounting platform. The device has the characteristics of low pool background noise, partition of the measurement section and the working section, capability of providing a stable and uniform wake field for the underwater vehicle, suitability for measuring hydrodynamic noise of various underwater vehicles, suitability for an underwater reverberation method and the like, and is a professional invented device for measuring the radiation noise of the underwater vehicle.
Description
Technical Field
The invention relates to a reverberation pool, in particular to a circulating reverberation pool. In particular to a circulating reverberation water pool for measuring radiation noise of an underwater vehicle.
Background
Noise evaluation of underwater vehicles is an important research direction in the field of underwater acoustics, and is one of the problems which are not solved effectively. Rational assessment of the noise performance of an underwater vehicle relies on accurate measurement of the radiated noise of the underwater vehicle. Currently, there are two main approaches to the study of the noise performance of underwater vehicles: firstly, measuring radiation noise of an underwater vehicle entity under the actual working condition in the ocean or the lake; and secondly, measuring the radiation noise of the underwater vehicle model in a simulated state in a circulating water tank or a water pool. In the external field tests such as the sea test in the first scheme, adverse factors such as high test cost and complex natural environment sound field exist, and a very accurate measurement result cannot be obtained; the second scheme has the following problems which are not really solved: (1) the existing water drum (including circulating type and gravity type) and circulating water tank have limited working section size, are often designed for hydrodynamic experimental research of underwater vehicle scaling models, and do not have conditions for hydrodynamic experiment on real-scale underwater vehicles; (2) the working sections of the existing water drum and the circulating water tank do not meet the conditions for measuring the underwater free field and the underwater reverberation field, and even if the same underwater vehicle scaling model is adopted, the noise measurement results among different facilities are still different under the same wake field condition; (3) in an underwater vehicle scaling model test carried out in a circulating water tank, only a part of fluid similarity criteria is considered according to the requirements of a hydrodynamics test, so that the measured radiation noise is often similar only in partial frequency bands and is not enough to serve as a standard for evaluating the noise performance of an underwater vehicle when an experimental result obtained by calculating a scale effect is compared with an actual measurement result of an entity; (4) the existing silencing water pool or reverberation water pool can not simulate the flow field environment of the underwater vehicle in the working state, and the relation between the noise measurement result of the underwater vehicle in the water pools and the radiation noise of the underwater vehicle in the actual working state is unknown, so convincing conclusion can not be obtained.
At present, the underwater acoustic measurement method mainly comprises two methods, namely direct measurement in a silencing water pool and measurement in a reverberation water pool by using an underwater reverberation method. As the noise elimination pool is difficult to build and high in cost, only part of key laboratories in China have the noise elimination pool, and the reverberation pool is easy to build, multiple experimental researches show that the method for measuring the radiated sound power of the underwater complex sound source by using the reverberation method in the reverberation pool environment has many advantages, such as repeatable measurement process, high reliability of measurement results, low background noise of the test environment, easy satisfaction of test conditions, wide applicability of the measurement method and the like, and the acoustic performance of the sound source can be accurately evaluated by the radiated sound power of the sound source measured by the underwater reverberation method. Therefore, it is feasible to measure the radiated noise of an underwater vehicle under specific wake field conditions using the underwater reverberation method.
And (3) searching and finding: the invention relates to a circulating water tank, which is mainly suitable for various fluid tests, such as a small-sized closed horizontal circulating water tank device with the patent number of CN202720106U, designs a closed water flow circulating tank formed by sections, can observe a flow field and a test model, is suitable for performing fluid mechanics basic tests and the like, and cannot be used for measuring the radiation noise of the test model in the flow field; the combined water tank shear flow guiding device of patent number CNIO5761596A can be placed in different water tanks to generate shear flows meeting different experimental requirements, is suitable for carrying out experimental research of wave flow interaction, but cannot be used for acoustic measurement research; the horizontal circulating water tank with the diversion and rectification device disclosed in patent No. CN206311301U solves the problem that the transverse circulation in the annular water tank affects the test precision, can be used for open water tests of propellers and maneuverability research of simple geometric bodies such as underwater vehicles, but cannot be used for evaluating the noise performance of the underwater vehicles.
Regarding the invention patent of using the reverberation method to measure the flow noise, patent No. CN205209631U is a diversion device for measuring the underwater jet noise by the reverberation method, and when the jet noise is measured in a reverberation water tank, the height of the water surface can be controlled to be unchanged, but the device cannot provide a stable and uniform wake field for an underwater vehicle, and is not suitable for measuring the radiation noise of the underwater vehicle.
Disclosure of Invention
The invention aims to provide a circulating reverberation water tank for measuring radiation noise of an underwater vehicle, which can provide a stable and uniform wake field for the underwater vehicle, can adjust the flow rate and has high accuracy of a measuring result.
The purpose of the invention is realized as follows:
the device comprises a reverberation water tank and a water circulation system consisting of a pipeline and a water pump, wherein the reverberation water tank consists of a working section and a measuring section, a water inlet and a water outlet of the water circulation system are arranged at the working section, flow guide devices are respectively arranged at the water inlet and the water outlet, a model mounting platform is positioned at the center of the working section, and a flow stabilizing device is arranged between the water inlet flow guide devices and the model mounting platform.
The present invention may further comprise:
1. the flow stabilizer is a circular hole plate which is distributed with uniform aperture and is uniformly distributed according to a honeycomb shape.
2. The diversion device is respectively arranged on a diversion pipe at the water inlet and a drainage pipe at the water outlet, and the diversion pipe and the drainage pipe are both in a horn mouth shape.
3. The hydrophone array is arranged in the measurement section.
The invention designs a novel hydrodynamic acoustic measuring device, namely a circulating reverberation water pool for measuring the radiation noise of an underwater vehicle. The invention solves the problem that professional equipment for measuring the radiation noise of the underwater vehicle is lacked at present. The circulating reverberation pool can provide a stable and uniform wake field for an underwater vehicle, the flow rate is adjustable, the influence of a water pump and a pipeline system on a sound field in the reverberation pool is reduced by adopting vibration isolation and vibration reduction measures, the direct influence of the wake field on a hydrophone is greatly weakened by separating a working section from a measuring section, and the accuracy of a measuring result is improved.
The invention discloses a circulating reverberation water pool for measuring radiation noise of an underwater vehicle, which is invented equipment capable of providing a uniform wake field for an underwater vehicle model and measuring the radiation noise of the underwater vehicle model. The reverberation water tank consists of a working section and a measuring section, and flow guide devices are arranged at a water inlet and a water outlet of the working section; a flow stabilizer is arranged between the water inlet flow guide device and the model mounting platform; the model mounting platform is positioned in the center of the working section; the pipeline system communicates the water inlet, the water pump and the water outlet outside the pool, and vibration reduction and isolation measures are used; the water pump pushes the water in the reverberation pond to circularly flow in the working section and the pipeline.
The water tank is a circulating reverberation water tank, a water pump pushes water in the circulating water tank to circularly flow in a pipeline system, and a stable and uniform wake field is formed in a working section by the flow guide device and the flow stabilizing device; and arranging a hydrophone array in the measuring section, and measuring the radiation noise of the underwater vehicle by using an underwater reverberation method.
The flow guide device is a flow guide pipe arranged at a water inlet and a drainage pipe arranged at a water outlet respectively.
The flow stabilizer is a circular hole plate which is distributed with uniform aperture and is uniformly distributed according to a honeycomb shape.
The specific working state is that water flows in from a water inlet of a working section of the reverberation water tank through the pipeline system, passes through the flow guide device and the flow stabilizing device, forms stable and uniform incoming flow in front of the underwater vehicle, and then flows through the underwater vehicle and flows out of a water outlet to the pipeline system. In the process, a hydrophone array is arranged in a measuring section, and the radiation noise of the underwater vehicle in a period of time is measured for multiple times.
The advantages of the invention are specified below:
1. the reverberation water tank is divided into the working section and the measuring section, so that the direct action of a pulsating pressure source on the hydrophone is effectively eliminated, and the accuracy and the repeatability of the radiation noise measurement of the underwater vehicle are ensured.
2. The invention installs the flow guiding device at the water inlet of the working section of the reverberation water tank, enlarges the cross section area of water flow at the water inlet, installs the flow stabilizing device in front of the underwater vehicle, destroys turbulent flow and turbulence in the incoming flow, and provides a stable and uniform wake field for the underwater vehicle model.
3. The invention adjusts the flow velocity of the flow field in the working section of the circulating reverberation water tank by controlling the flow of the water pump.
4. The invention uses the design of vibration reduction and vibration isolation in the pipeline system, and reduces the influence of the mechanical noise of the water pump and the pipeline system on the sound field in the circulating reverberation water tank.
5. The method is suitable for measuring the radiation noise of the underwater vehicle under the condition of the wake field by using an underwater reverberation method, and has the advantages of simple and convenient measuring method, accurate result and high repeatability.
The invention has the advantages of separation of the water pool measuring section and the working section, stable and uniform wake field of the working section, adjustable flow velocity, suitability for measuring the radiation noise of different types of underwater vehicles, low background noise in the water pool, filling the blank of the indoor underwater vehicle radiation noise measuring equipment and the like. After the underwater vehicle noise evaluation device is put into use, the development of an underwater sound measurement technology can be greatly promoted, and the standardized research of the underwater vehicle noise evaluation is promoted.
The invention aims to solve the problem of accurately measuring the radiation noise of an underwater vehicle in a wake field under the controllable condition of a laboratory, and designs a device of a circulating reverberation pool.
Drawings
FIG. 1 is a schematic diagram of a configuration of a circulating reverberant pool for underwater vehicle radiated noise measurement.
FIG. 2 is a schematic view of a flow guide device.
Fig. 3 a schematic view of a flow stabilizer.
Fig. 4 a schematic view of a mold mount.
Fig. 5 is a schematic view of an underwater vehicle mounted on a model mounting station.
FIG. 6 is a schematic diagram of a piping system and power system.
FIG. 7 is a schematic diagram of a power system (water pump).
Detailed Description
The invention is described in more detail below by way of example.
Fig. 1 is a circulating reverberation water tank for measuring radiation noise of an underwater vehicle, and the circulating reverberation water tank comprises a reverberation water tank 5, a pipeline system formed by pipelines 2, a power system formed by a water pump 1, a flow guide device, a flow stabilizer 4 and a model mounting table 8. The reverberation pond constitute by working section and measurement section two parts, all install guiding device in the water inlet of working section and delivery port department, guiding device is including installing in delivery port department honeycomb duct 3 and installing in delivery port department's drainage tube 7, the model mount table is located the center of working section, sets up the current stabilizer in the incoming flow direction of model mount table, the working section outside is by pipe-line system with water inlet, water pump and delivery port intercommunication.
As shown in fig. 1, the circulating reverberation water pool is composed of a working section and a measuring section, wherein the height from a water inlet and a water outlet of the working section to the pool bottom is 1/2 about the water depth, the working section is an area where an underwater vehicle is fixedly installed and provides a uniform wake field for the underwater vehicle, and the measuring section is an area where a hydrophone array is arranged and radiation noise of the underwater vehicle is measured and is located in a blank area on the right side in fig. 1; the working segment occupies about 1/3 of the volume of the reverberation pool, and the measuring segment occupies about 2/3 of the volume of the reverberation pool.
The water inlet and the water outlet of the working section are both provided with flow guiding devices, as shown in figure 2, the flow guiding devices are in a horn mouth shape as a section of variable cross-section pipe, the flow guiding device at the water inlet has the function of increasing the cross-sectional area of incident water flow, and the flow guiding device at the water outlet has the function of gathering water flow.
As shown in fig. 3, the flow stabilizer is a mesh flat plate with a certain thickness and uniform diameter of each hole and arranged in a honeycomb shape, and is installed in the incoming flow direction of the model mounting table to eliminate turbulence and turbulent flow in the incoming flow, so that the wake field of the underwater vehicle is stable and uniform.
The model mounting platform is positioned at the center of the working section as shown in figure 4 and is used for fixing the underwater vehicle 6, the specific effect is that various types of underwater vehicles can be replaced as shown in figure 5, and the center of the underwater vehicle and the circle centers of the water inlet and the water outlet of the working section are approximately positioned on the same horizontal line.
As shown in fig. 6, a pipeline system connects the power system with the working section of the circulating reverberation tank to form a closed external circulation path. The pipeline system comprises several sections of pipelines, and the pipelines are connected with the water inlet, the water outlet and the water pump through flange plates, so that the pipeline system is convenient to disassemble and assemble, and the pipelines made of different materials can be replaced according to the requirements of different experiments. In addition, the pipeline system adopts certain vibration isolation and vibration reduction measures, and a rubber section is used at the position connected with the water pump, so that the influence of the vibration of the water pump on the whole pipeline system is reduced.
The power system is composed of a water pump and a frequency converter, and is communicated with the circulating reverberation water tank through a pipeline, the working flow of the water pump can be adjusted by using the frequency converter, and the flow velocity of an adjoint flow field in the working section of the circulating reverberation water tank is further controlled.
In a measuring section of the circulating reverberation water tank, radiation noise of an underwater vehicle in an adjoint flow field is measured by using a hydrophone vertical array, space averaging is carried out in a reverberation area of the water tank to obtain space mean square sound pressure, and then the sound source level of the radiation noise of the underwater vehicle is calculated according to the correction quantity of the reverberation circulating water tank.
The invention relates to a circulating reverberation water pool for measuring radiation noise of an underwater vehicle, which is invented equipment capable of providing a uniform wake field for an underwater vehicle model and measuring the radiation noise of the underwater vehicle model. The equipment comprises a reverberation water pool, a pipeline system, a power system, a flow guide device, a flow stabilizing device and a model mounting platform. The reverberation water tank consists of a working section and a measuring section, and flow guide devices are arranged at a water inlet and a water outlet of the working section; a flow stabilizer is arranged between the water inlet flow guide device and the model mounting platform; the model mounting platform is positioned in the center of the working section; the pipeline system communicates the water inlet, the water pump and the water outlet outside the pool, and vibration reduction and isolation measures are used; the water pump pushes the water in the reverberation pond to circularly flow in the working section and the pipeline. The device has the characteristics of low pool background noise, partition of the measurement section and the working section, capability of providing a stable and uniform wake field for the underwater vehicle, suitability for measuring hydrodynamic noise of various underwater vehicles, suitability for an underwater reverberation method and the like, and is a professional invented device for measuring the radiation noise of the underwater vehicle.
Claims (3)
1. A circulating reverberation water pool for measuring radiation noise of an underwater vehicle comprises a reverberation water pool and is characterized in that: the device also comprises a water circulation system consisting of a pipeline and a water pump, wherein the reverberation water tank consists of a working section and a measuring section, the working section accounts for 1/3 of the volume of the reverberation water tank, the measuring section accounts for 2/3 of the volume of the reverberation water tank, the hydrophone array is arranged in the measuring section, a water inlet and a water outlet of the water circulation system are arranged in the working section, flow guide devices are arranged at the water inlet and the water outlet, the model mounting table is positioned at the center of the working section, and a flow stabilizing device is arranged between the water inlet flow guide device and the model mounting table.
2. The circulating reverberation pool for underwater vehicle radiation noise measurement of claim 1, wherein: the flow stabilizer is a circular hole plate which is distributed with uniform aperture and is uniformly distributed according to a honeycomb shape.
3. The circulating reverberation pool for the underwater vehicle radiation noise measurement according to claim 1 or 2, characterized in that: the diversion device is respectively arranged on a diversion pipe at the water inlet and a drainage pipe at the water outlet, and the diversion pipe and the drainage pipe are both in a horn mouth shape.
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| CN202010022252.XA CN111169607B (en) | 2020-01-09 | 2020-01-09 | Circulating reverberation water pool for measuring radiation noise of underwater vehicle |
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| CN111169607B true CN111169607B (en) | 2021-10-26 |
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| CN112254943B (en) * | 2020-10-12 | 2023-03-31 | 中国船舶工业集团公司第七0八研究所 | Device and method for measuring external characteristics and noise performance of water jet propulsion pump |
| CN114689347A (en) * | 2020-12-28 | 2022-07-01 | 中国科学院沈阳自动化研究所 | Unmanned submersible auxiliary test system |
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Application publication date: 20200519 Assignee: QINGDAO OUSHEN AIERSI OCEAN INFORMATION EQUIPMENT CO.,LTD. Assignor: HARBIN ENGINEERING University Contract record no.: X2023980042850 Denomination of invention: A Circulating Reverberation Tank for Measuring Radiated Noise of Underwater Vehicles Granted publication date: 20211026 License type: Common License Record date: 20230928 |