Overall-unit forced surge method for engine

An engine and complete machine technology, applied in the field of aero-engines, can solve the problems of high test risk and complicated operation, and achieve the effects of reduced test risk, simple operation steps, accurate surge margin and aerodynamic stability

Inactive Publication Date: 2012-07-18
CHINA AVIATION POWER MACHINE INST
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for forcing the whole engine to solve the technical problems of the existing fuel step method, which are complex in operation and relatively risky in testing

Method used

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  • Overall-unit forced surge method for engine

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Embodiment Construction

[0015] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0016] see figure 1 , the complete machine breathing method of engine of the present invention comprises the steps:

[0017] Step S01, providing a compressor, and obtaining the surge boundary of the compressor. Preferably, the compressor is first tested on a component test bench, so as to obtain the surge boundary of the compressor. Then proceed to step S02.

[0018] Step S02, start the engine, and introduce high-pressure gas into the engine, so that the engine gradually approaches the surge boundary, and simultaneously use the surge monitor to collect engine parameters in real time.

[0019] In step S02, the device for inputting high-pressure gas is connected to a forced asthma test device, and the forced asthma test device is connected to the o...

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Abstract

The invention provides an overall-unit forced surge method for an engine, which successively comprises the following steps: 1. providing a gas compressor, and obtaining a surge margin of the gas compressor; 2. starting the engine, introducing high-pressure gas into the engine so that the engine approaches to the surge margin, and meanwhile, collecting the parameters of the engine by a surge monitor in real time; and 3. according to the parameters obtained by the surge monitor, determining the surge allowance of the engine. With the overall-unit forced surge method for the engine, the surge allowance and the pneumatic stability of the engine can be accurately determined. The method comprises simple operation steps, and the test risk is greatly lowered.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to a method for exhausting the entire engine. Background technique [0002] The gas turbine shaft engine's whole machine compression technology mainly verifies the aerodynamic stability of the engine. Whether the aerodynamic stability of the engine meets the requirements is mainly determined by detecting the surge margin of the engine as a whole. [0003] At present, the fuel step method is mainly used to make the engine enter into surge, so as to obtain the surge margin of the engine. The fuel step method requires multiple tests to determine the fuel step amount that causes engine surge, and the fuel step amount should not be controlled. In addition, because a large fuel flow is added to the engine in a very short period of time, the gas temperature in the engine rises sharply in a short period of time, which is likely to cause problems such as blade ablation, breakage, and large fluc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00G01M15/12
Inventor 蔡建兵李概奇李建华成本林吴志勇
Owner CHINA AVIATION POWER MACHINE INST
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