Movable plugboard type total pressure distortion generator with low unnecessary pulsation and test method
A distortion generator and plug-in technology, which is applied in the field of aero-engines, can solve the problem of high turbulence, and achieve the effects of reducing high-intensity turbulence, strong versatility and convenient operation.
Active Publication Date: 2021-04-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
When the airflow flows through the position of the movable plate-type distortion generator, it will enter the gap and the cavity formed by the sealed box, resulting in pressure pulsation and high turbulent airflow, which makes the turbulent flow of the inlet section of the test piece too high
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[0025] The present invention will be further described below in conjunction with the accompanying drawings.
[0026] Such as figure 1 As shown, the low unnecessary pulsation mobile plate-type total pressure distortion generator disclosed by the present invention includes four parts: straight pipe I section 1, distortion section 2, insert plate 3 and straight pipe II section 4. The specific structure of straight pipeline I section 1 and straight pipeline II section 4 is as follows figure 2 with Figure 4 As shown, it consists of a flow channel 5 and a circular connecting plate 6. The geometric shape of the cross-section of the flow channel is circular, and the geometric shape and radius are consistent with the main flow channel; the straight pipe section is connected with the distortion section 2 by bolts, and there are bolt holes 7 on the circular connecting plate 6 for installing bolts.
[0027] The specific structure of the distortion section 2 is as follows image 3 As...
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The invention discloses a movable plugboard type total pressure distortion generator with low unnecessary pulsation and a test method. The distortion generator comprises two distortion sections which are matched with each other, and rectangular connecting plates which are matched with each other are arranged at the joints of the distortion sections respectively; one distortion section is provided with a circular support plate and a support plate adjusting driver along a runner opening; the circular support plate comprises a section of fixed arc support plate and a plurality of sections of telescopic arc support plates; the support plate adjusting driver comprises a knob and a volute spiral spring; adjustment is carried out according to the depth of the inserting plate inserted into the flow channel, and the continuous adjustable capacity of the flow field distortion intensity is reserved; and the circular support plate enables the plugboard type distortion generator to be better attached to the cylindrical wall surface of the flow channel, so that airflow is prevented from entering a containing cavity formed by a gap and a sealing box when flowing through the position where the movable plugboard type distortion generator is located, pressure pulsation is reduced, and turbulence degree of airflow on the section of an inlet of a tested piece is reduced.
Description
technical field [0001] The invention relates to the technical field of aero-engines, and mainly relates to a mobile plate-type total pressure distortion generator with low unnecessary pulsation and a test method. Background technique [0002] Aviation aircraft inevitably encounter some aerodynamic stability problems during flight. A large number of studies have shown that intake distortion is one of the key factors that induce flow instability inside the compressor, and it occurs most frequently. [0003] Drawing on the experience of developing Russian aero-engines, the technical route of plug-in imported total pressure distortion generator plus comprehensive distortion index is generally used in my country to evaluate the aerodynamic stability of aero-engines. [0004] The removable plate-type inlet total pressure distortion generator is composed of a rectangular plate, a rectangular sealing box with a round hole, a hydraulic cylinder, a displacement sensor and an auxiliary...
Claims
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IPC IPC(8): G01M15/14G01M15/02
CPCG01M15/02G01M15/14
Inventor 李传鹏宣彬胡骏阮立群朱春雨
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS