SU377649A1 - YSESYUZNLA - Google Patents

Description

one

The invention relates to laboratory instruments and apparatus.

Devices are known for investigating the heating of a jet of liquid by steam, containing a steam chamber, in the upper part of which a blowing agent (nozzles) is installed. The heated liquid through the nozzle in the form of a jet flows into the steam chamber, is heated by steam and at the bottom of the chamber enters the receiving funnel, in which a temperature-sensitive element is located, designed to measure the average temperature of the fluid in the jet.

The drawback of these devices is that the receiving funnel is in the vapor space, and the contact between the liquid and the steam continues after the liquid reaches the receiving funnel. Due to the heat transfer in the receiving funnel, the liquid receives an additional amount of heat, therefore the temperature value measured by the thermometer is higher than the true average temperature of the liquid in the jet.

To improve the accuracy of measuring the average temperature of the liquid in the jet in the proposed device, the steam chamber is equipped with baffles with holes installed parallel to each other above the receiving funnel and a flat nozzle with an expanding diffuser placed in space

between the middle and lower partitions, with cavities between the partitions communicating with the atmosphere.

The drawing shows the described device.

A pressure chamber / and a plate with a nozzle-generator 2 are fixed to the upper part of the steam chamber 3. In the lower part of the steam chamber, there are partitions 4 with openings installed across the chamber at a certain distance one above the other, and a flat nozzle 5 placed in the space between the middle and bottom partitions so that the nozzle plane is parallel to the plane of the partitions. The space between the partitions is communicated with the atmosphere. A receiving funnel 6 with a thermometer 7 is located under the lower partition coaxially with the blowing agent and the holes in the partitions.

The device works as follows.

The working fluid is supplied to the pressure chamber 1, from where, through the nozzles 2, it flows in the form of a jet into the steam chamber 3, into which a small excess pressure is supplied through the fitting. In the vapor space, the liquid is heated by condensation of water vapor on its surface. In the lower part of the steam chamber 3, the jet is heated reaches the partitions 4 and passes through the holes in them, without touching the edges. Basically - the mass of steam entering from the vapor space along with the liquid jet through the opening of the upper partition, goes into the atmosphere, and the rest of the steam, accompanied by a jet of liquid, penetrates through the hole of the middle partition and enters the flat horizontal jet of air from the nozzle 5. The air jet carries steam into the atmosphere, and a stream of liquid, having passed the air curtain and the opening of the lower partition, reaches the receiving funnel 6 already out of contact with steam. To prevent heat exchange between the liquid and air streams, the latter is preheated to the temperature of the liquid, and its humidity is maintained close to 100%. Thus, a flat stream of air, having broken, but liquid and vapor, marks the end of the experimental part of the jet, and the distance between the plane of the jet and the jet-forming opening defines

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Subject invention

A device for studying the heating of a jet of liquid with a Lara containing a steam chamber, in the upper part of which a nozzle is installed, and in the lower part a receiving funnel with a temperature-sensitive element, characterized in that, in order to improve the accuracy of measuring the average temperature of the fluid in the jet, the steam chamber is equipped with partitions with openings installed mutually in parallel over the receiving funnel, and a flat nozzle with an expanding diffuser, placed in the space between the middle and lower partitions, with cavities between partitions communicated with the atmosphere.