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A test method of engine tail jet pressure field

A test method and stress test technology, applied in the aviation field, to achieve the effects of cost reduction, wide applicability, and technical risk reduction

Active Publication Date: 2016-06-08
SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no effective test method to provide the necessary test data support for the design of the structural strength of the deflector, the delineation of the safety maintenance scope of the air and ground crew, etc.

Method used

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  • A test method of engine tail jet pressure field
  • A test method of engine tail jet pressure field

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Embodiment Construction

[0031] The present invention will be described in further detail below through specific embodiments and in conjunction with the accompanying drawings.

[0032] This example is a twin-engine aircraft, using the free-flow contact pressure test system to test the pressure field of the engine tail jet. Specific steps are as follows:

[0033] First, arrange the test system according to the free flow state: place three sets of pressure test rakes in parallel directly behind the engine tail nozzle, perpendicular to the tail nozzle axis, and respectively 9m, 15m, and 25m away from the engine tail nozzle section; , The data processing computer for the total pressure test is placed in a safe area;

[0034] Second, connect the test cables between the total pressure and static pressure test sensors and the data processing computer, power on the system for inspection, and complete the equipment debugging and preparation work before the test;

[0035] Thirdly, carry out the first phase of...

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Abstract

The invention belongs to the power plant system in the technical field of aviation, and relates to a test method for the pressure field of the engine tail jet flow. The invention adopts the method of combining the free flow contact pressure test to measure the total pressure and the static pressure of the engine tail jet flow field. Due to the significant difference in the pressure field of the engine tail jet under the two states of free flow and deflector reflection, the test system is arranged according to the characteristics of the two states of free flow and deflector reflection. Under the two layouts, the engine test run is carried out separately, and the total pressure and static pressure data of the engine are measured simultaneously by two sets of test systems. The invention can realize the test of the pressure field of the tail jet flow of the engine, and obtain the pressure field of the tail jet flow under two states of free flow and deflector plate reflection, thereby providing scientific basis for the planning of the safe area on the ship and the design of the structural strength of the deflector plate.

Description

technical field [0001] The invention belongs to the field of aviation technology, and in particular relates to a method for testing the pressure field of an engine tail jet flow. Background technique [0002] The tail jet produced by the gas turbine engine has the characteristics of high temperature, high pressure and high speed, and its high pressure characteristics have a direct impact on the structural strength of the take-off drift device and the safety of personnel. [0003] Carry out the research on the test technology of engine tail jet pressure field, through the contact pressure test system with simulated deflector plate composed of a series of installed pressure sensor test rakes and data processing computer, the felt tail jet parameters are converted into An electrical signal proportional to energy can be processed by a data processing computer to obtain a complete pressure distribution of the engine wake field. This kind of test rake has applied for a national p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L23/00G01M15/14
Inventor 马松连永久于新刘素萍
Owner SHENYANG AIRCRAFT DESIGN INST AVIATION IND CORP OF CHINA
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