CN103016398B - Centrifugal impeller flow passage design method for controlling curvature distribution - Google Patents
Centrifugal impeller flow passage design method for controlling curvature distribution Download PDFInfo
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Abstract
The invention belongs to a fluid mechanical design modeling method and particularly relates to a centrifugal impeller flow passage design method for controlling the curvature distribution. A meridional flow passage of a centrifugal impeller comprises the following design steps that the parametric forming is realized through controlling the axial distribution of the curvature of a wheel cover line and a wheel hub line; and then, an obtained wheel cover and an obtained wheel hub curve rotate for 360 degrees around a rotating shaft, and a wheel cover surface and a wheel hub surface are obtained. The design method has the advantages that the proper curvature distribution rule can be flexibly selected according to the flowing work applying condition of the centrifugal impeller through controlling the curvature of the flow passage curves, the work apply efficiency and the stable work boundary of the centrifugal impeller are improved, and the design method can be widely applied to various kinds of centrifugal and inclined flow type impeller mechanical flowing designs.
Description
Technical field
The invention belongs to fluid machinery design model method, be specifically related to a kind of centrifugal impeller flow passage design method controlling curvature distribution.
Background technique
Receded disk impeller machinery is a core component of aircraft jet engine, and is widely used in the power and energy field of various fluid compression or fluid expansion.The design of the meridional channel of receded disk impeller machinery is very large to receded disk impeller mechanical impact.But the design criterion that meridional channel design is never clear and definite, general dependence designer experience, designs subjective randomness larger.The wheel cap line of current routine, wheel hub line design method, generally add linear method by circular arc and be formed by connecting.This design is easy to cause flow losses, reduces the mechanical efficiency of receded disk impeller machinery.
Summary of the invention
The object of this invention is to provide a kind of centrifugal impeller flow passage design method controlling curvature distribution, there is good mobile performance, the function mechanical efficiency of receded disk impeller machinery can be improved.
The technical solution used in the present invention is:
The meridional channel of this centrifugal impeller is formed by wheel cap line, wheel hub line, inlet line, egress line envelope, and design procedure is:
(1) by controlling wheel cap line, the distribution in the axial direction of wheel hub line curvature, carrying out parametrization and being formed; Wheel cap line and the wheel hub curvature of a curve regularity of distribution, adopt following formula to determine:
Wherein, C (m) is wheel cap line or wheel hub curvature of a curve, and m is the non-dimensional length of wheel cap line or wheel hub line; μ is that maximum curvature place flows to dimensionless position, and the preferred value of μ is 0.4 ~ 0.6; A is the dimensionless amplitude of wheel cap line or wheel hub line curvature, and
wherein r
2it is the exit radius of centrifugal impeller;
Determine that the concrete steps of wheel cap line and wheel hub line are:
(101) 4 endpoint locations of wheel cap line and wheel hub line are determined respectively according to One-Dimensional flows computational methods;
(102) wheel cap line is divided into n (50≤n≤200) section, determines the axial coordinate of n-1 point except two-end-point, according to the curvature k of first point and the coordinate (Z of this point
1, R
1), determine the coordinate (Z of second point
2, R
2); Then with the curvature k of second point and this point coordinates, the coordinate (Z of the 3rd point is determined
3, R
3); By that analogy, obtain wheel cap line coordinate a little;
(103) n+1 point on the wheel cap line obtained is used smooth curve, just can obtain smooth wheel cap curve;
(104) adopt the method for step (102) and (103), obtain wheel hub curve;
(2) the wheel cap curve obtained by step (1), wheel hub curve rotate 360 ° around running shaft, obtain wheel capping and wheel hub surface.
Described wheel hub line maximum curvature radius amplitude A is 0.3 ~ 0.8 times of wheel cap line maximum curvature.
The present invention has following beneficial effect:
By controlling the curvature of passage curve, can according to the flowing acting situation of centrifugal impeller, the curvature distribution rule that flexible selection is suitable, control the distribution of centrifugal impeller flowing load in axis, improve the stable operation border of mechanical efficiency and centrifugal impeller, the flow design of various centrifugal, mixed flow compressor tool can be widely used in.
Accompanying drawing explanation
Fig. 1 is structural principle sketch of the present invention.
Fig. 2 is the schematic diagram of meridional channel in Fig. 1.
Fig. 3 is typical curvature distribution figure of the invention process.
Number in the figure:
1-wheel cap line; 2-wheel hub line; 3-inlet line; 4-egress line.
Embodiment
The invention provides a kind of centrifugal impeller flow passage design method controlling curvature distribution, below in conjunction with the drawings and specific embodiments, the present invention will be further described.
The axial longitudinal section of receded disk impeller machinery, is generally referred to as meridional channel.This meridional channel is formed by wheel cap line 1, wheel hub line 2, inlet line 3 and egress line 4 envelope, as depicted in figs. 1 and 2.
The design procedure of this meridional channel is:
(1) according to formula
determine wheel cap line curvature distribution curve, get μ=0.5, A=0.03, m are in interval [0,1], and e is natural constant 2.718, therefore obtains the distribution curve of C as shown in wheel cap curvature in Fig. 3.
(101) on curvature distribution line, get n=100 point, determine the curvature value needed for curve point as next step, as shown in the table.
(102) determine that wheel cap line two ends point coordinates is for (-75,78.5) (-8.4,118) respectively according to One-Dimensional flows computational methods, the two ends point coordinates of wheel hub line is (-75,30) (0,118);
(103) wheel cap line is divided into 100 sections, determines the axial coordinate of 99 points except two-end-point, according to the curvature C of first point and the coordinate (Z of this point
1, R
1), determine the coordinate (Z of second point
2, R
2); Then with the curvature C of second point and this point coordinates, the coordinate (Z of the 3rd point is determined
3, R
3); By that analogy, obtain wheel cap line coordinate a little;
(104) by 101 smooth curves of point on the wheel cap line of upper table, smooth wheel cap curve can just be obtained, as shown in Figure 2;
(105) adopt the method for step (102)-(104), obtain wheel hub curve, as shown in Figure 2;
(2) the wheel cap curve obtained by step (1), wheel hub curve rotate 360 ° around running shaft, obtain wheel capping and wheel hub surface.
Claims (2)
1. control a centrifugal impeller flow passage design method for curvature distribution, the meridional channel of this centrifugal impeller is formed by wheel cap line, wheel hub line, inlet line, egress line envelope, and it is characterized in that, design procedure is:
(1) by controlling wheel cap line, the distribution in the axial direction of wheel hub line curvature, carrying out parametrization and being formed; Wheel cap line and the wheel hub curvature of a curve regularity of distribution, adopt following formula to determine:
Wherein, C (m) is wheel cap line or wheel hub curvature of a curve, and m is the non-dimensional length of wheel cap line or wheel hub line; μ is that maximum curvature place flows to position percent value, and the span of μ is 0.4 ~ 0.6; A is the dimensionless amplitude of wheel cap line or wheel hub line curvature, and
wherein r
2it is the exit radius of centrifugal impeller;
Determine that the concrete steps of wheel cap line and wheel hub line are:
(101) 4 endpoint locations of wheel cap line and wheel hub line are determined respectively according to One-Dimensional flows computational methods;
(102) wheel cap line is divided into n (50≤n≤200) section, determines the axial coordinate of n-1 point except two-end-point, according to the curvature C (m) of first point and the coordinate (Z of this point
1, R
1), determine the coordinate (Z of second point
2, R
2); Then with the curvature C (m) of second point and this point coordinates, the coordinate (Z of the 3rd point is determined
3, R
3); By that analogy, obtain wheel cap line coordinate a little;
(103) n+1 point on the wheel cap line obtained is used smooth curve, just can obtain smooth wheel cap line;
(104) adopt the method for step (102) and (103), obtain wheel hub line;
(2) the wheel cap line obtained by step (1), wheel hub wire-wound running shaft rotate 360 °, obtain wheel capping and wheel hub surface.
2. a kind of centrifugal impeller flow passage design method controlling curvature distribution according to claim 1, is characterized in that, wheel hub line maximum curvature radius value is 0.3 ~ 0.8 times of wheel cap line maximum curvature value.
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| CN201210546397.5A CN103016398B (en) | 2012-12-14 | 2012-12-14 | Centrifugal impeller flow passage design method for controlling curvature distribution |
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| CN201210546397.5A CN103016398B (en) | 2012-12-14 | 2012-12-14 | Centrifugal impeller flow passage design method for controlling curvature distribution |
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| CN103016398B true CN103016398B (en) | 2015-06-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106593943B (en) * | 2016-12-06 | 2019-01-04 | 大连理工大学 | A kind of core main pump runner forming method based on intermediate line traffic control |
| CN110374900B (en) * | 2019-08-09 | 2021-05-28 | 西安交通大学 | Mixed flow fan with sinusoidal meridian flow channel |
| CN111120400A (en) * | 2019-12-24 | 2020-05-08 | 哈尔滨工程大学 | Centrifugal compressor for micro gas turbine |
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| US6106230A (en) * | 1995-12-14 | 2000-08-22 | Warman International Limited | Centrifugal pump |
| EP2261510A2 (en) * | 2009-06-10 | 2010-12-15 | Mitsubishi Heavy Industries, Ltd. | Method of manufacturing impeller of centrifugal rotary machine and impeller of centrifugal rotary machine |
| CN102062118A (en) * | 2011-01-07 | 2011-05-18 | 江苏大学 | Design method for centrifugal pump impeller with high specific revolution number |
| CN102146933A (en) * | 2010-02-09 | 2011-08-10 | 上海东方泵业(集团)有限公司 | Method for designing inlet edge of impeller of centrifugal pump |
| CN102434489A (en) * | 2011-11-18 | 2012-05-02 | 江苏国泉泵业制造有限公司 | Three-flow-channel impeller design method of cutting pump |
| DE102011007907B3 (en) * | 2011-04-21 | 2012-06-21 | Ksb Aktiengesellschaft | Impeller for centrifugal pumps |
| CN102691671A (en) * | 2012-03-08 | 2012-09-26 | 江苏大学 | Designing method of impeller core main pump wheel |
| CN102734209A (en) * | 2012-06-29 | 2012-10-17 | 江苏国泉泵业制造有限公司 | Design method of efficient screw centrifugal pump impeller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PE20141834A1 (en) * | 2008-05-27 | 2014-12-16 | Weir Minerals Australia Ltd | IMPROVEMENTS RELATED TO CENTRIFUGAL PUMPS |
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2012
- 2012-12-14 CN CN201210546397.5A patent/CN103016398B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6106230A (en) * | 1995-12-14 | 2000-08-22 | Warman International Limited | Centrifugal pump |
| EP2261510A2 (en) * | 2009-06-10 | 2010-12-15 | Mitsubishi Heavy Industries, Ltd. | Method of manufacturing impeller of centrifugal rotary machine and impeller of centrifugal rotary machine |
| CN102146933A (en) * | 2010-02-09 | 2011-08-10 | 上海东方泵业(集团)有限公司 | Method for designing inlet edge of impeller of centrifugal pump |
| CN102062118A (en) * | 2011-01-07 | 2011-05-18 | 江苏大学 | Design method for centrifugal pump impeller with high specific revolution number |
| DE102011007907B3 (en) * | 2011-04-21 | 2012-06-21 | Ksb Aktiengesellschaft | Impeller for centrifugal pumps |
| CN102434489A (en) * | 2011-11-18 | 2012-05-02 | 江苏国泉泵业制造有限公司 | Three-flow-channel impeller design method of cutting pump |
| CN102691671A (en) * | 2012-03-08 | 2012-09-26 | 江苏大学 | Designing method of impeller core main pump wheel |
| CN102734209A (en) * | 2012-06-29 | 2012-10-17 | 江苏国泉泵业制造有限公司 | Design method of efficient screw centrifugal pump impeller |
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