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Method for determining boundary condition of similarity test of rotating disc cavity

A technology of boundary conditions and similar tests, applied in the testing of machine/structural components, engine testing, jet engine testing, etc., can solve problems that do not take into account the compressibility of high-speed rotating disc cavity, strong dissipation characteristics, multiple degrees of freedom, etc. question

Pending Publication Date: 2020-01-24
AECC SHENYANG ENGINE RES INST
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Problems solved by technology

[0004] In the existing component tests, the compressible and strong dissipation characteristics of the high-speed rotating disk cavity are not considered; the boundary conditions of the component tests cannot be directly converted from the engine test data, and there are many degrees of freedom, which cannot be completely similar

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  • Method for determining boundary condition of similarity test of rotating disc cavity
  • Method for determining boundary condition of similarity test of rotating disc cavity
  • Method for determining boundary condition of similarity test of rotating disc cavity

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Embodiment Construction

[0032] In order to make the objectives, technical solutions and advantages of the implementation of the application clearer, the technical solutions in the implementation modes of the application will be described in more detail below with reference to the drawings in the implementation modes of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below by referring to the figures are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of this application. Embodiments of the pr...

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Abstract

The invention belongs to the technical field of aero-engine tests, and particularly relates to a method for determining boundary conditions of a similarity test of a rotating disc cavity. The method comprises the following steps: acquiring inlet temperature, inlet pressure, outlet pressure and physical rotating speed of a turbine disc cavity tested under the condition of an engine complete machine; giving an inlet temperature for carrying out a part test; determining dynamic viscosity coefficients of a complete machine test and a part test through a sasephland formula; determining the inlet pressure of the component test; determining the outlet pressure of the component test; determining the rotating speed of the component test; and carrying out a component test according to the inlet temperature, the inlet pressure, the outlet pressure and the rotating speed of the component test. The compressible and strong dissipation characteristics of the high-speed rotating disc cavity can be considered, and the boundary condition of a part test can be obtained through direct conversion according to test data of an engine complete machine test. Only one degree of freedom exists, so that the similarity and the test reliability are ensured.

Description

technical field [0001] The application belongs to the technical field of aero-engine testing, and in particular relates to a method for determining the boundary conditions of a similar test of a rotating disk cavity. Background technique [0002] The gradual increase in the temperature before the turbine of an aeroengine not only improves the performance of the engine, but also makes the working environment of the various disks of the engine, especially the turbine disk, worse. Analyzing its flow and heat transfer laws is crucial to the heat transfer design of the turbine disk. important. However, testing in a real machine environment is often limited by many actual conditions. For example, in the measurement of flow, pressure, temperature and other parameters, the location and number of measuring points will be limited by the actual situation of the engine, usually not too many, so To carry out detailed testing work, it generally needs to be carried out on component tests....

Claims

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Application Information

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IPC IPC(8): G06F30/20G01M15/14G01M15/02G06F119/14G06F119/08
CPCG01M15/14G01M15/02
Inventor 李宗超田申吴小军许亚楠邱天邓长春
Owner AECC SHENYANG ENGINE RES INST
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