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Internal flow resistance measuring method and device based on corrugated tube balance system

A measurement method and a technology of a measurement device, which are applied in the field of aircraft internal flow resistance measurement test, can solve problems such as the impact of the rake body on the flow at the bottom of the model, the complexity of the flow at the bottom of the model, and the influence of internal resistance accuracy, so as to improve accuracy and reliability, Good anti-deformation ability and little flow disturbance

Pending Publication Date: 2019-11-15
AVIC SHENYANG AERODYNAMICS RES INST
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  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following defects: the rake body affects the flow at the bottom of the model, which in turn affects the resistance of the precursor; the flow at the bottom of the model is complex, which affects the measurement of the rake body and affects the accuracy of the internal resistance

Method used

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  • Internal flow resistance measuring method and device based on corrugated tube balance system
  • Internal flow resistance measuring method and device based on corrugated tube balance system
  • Internal flow resistance measuring method and device based on corrugated tube balance system

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Example 1: Combining Figure 1-Figure 2 , the internal flow resistance measuring device based on the bellows balance system of the present embodiment is specifically described as:

[0052] Including bellows balance system 5, rectification device 4, measuring section 3 and connecting section 2;

[0053] The inlet part of the test piece 1 of the ventilation model is connected to the connecting section 2, the fixed end air supply pipe 8 of the bellows balance system 5 is connected to the outlet of the air supply pipeline on the ground platform, and the measuring end air supply pipe 12 of the bellows balance system 5 is connected to the connecting section 2 connection; the rectifying section device 4 and the measuring section 3 are arranged on the connecting section 2, the rectifying device 4 is arranged before the measuring section 3, and the measuring section 3 is arranged close to the entrance of the DUT 1.

[0054] More specifically: the rectifying device 4 includes an...

Embodiment 2

[0058] Example 2: Combining Figure 1-Figure 2 , the internal flow resistance measurement method based on the bellows balance system of the present embodiment is specifically described as:

[0059] During the test, the high-pressure gas supply is provided by the ground bench, and the total pressure measurement rake arranged in the measurement section 3 is fed back to adjust to the target test state in real time. After the flow field is stable, the total pressure measurement rake and the total temperature measurement point are collected to obtain the test state Total inlet pressure P of piece 1 0 and total temperature T t . At the same time, at the same moment, the measured flow m of the DUT 1 under the current test state is collected through the high-precision flowmeter of the bench 测 .

[0060] Under the condition of determining stability, send commands to control the bellows balance system 5 to collect the real-time aerodynamic force of the test piece 1 under the current...

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Abstract

The invention discloses an internal flow resistance measuring method and device based on a corrugated tube balance system, belongs to the technical field of internal flow resistance measurement testson aircrafts, and solves the problems of interference existence and insufficient accuracy when exit momentum is obtained by a pressure measuring rake arranged at an internal flow pipeline exit traditionally. The method is characterized in that the method indirectly measures internal resistance by calibrating thrust of an internal flow passage on a ground rack and comprises the steps as follows: acquiring entrance parameters of a to-be-measured part to obtain entrance momentum of an internal flow pipeline; directly acquiring exit momentum of the internal flow pipeline on the basis of the corrugated tube balance system; taking the internal flow resistance of the to-be-measured part as the momentum difference between the entrance and the exit. Besides, the measuring device mainly comprises the corrugated tube balance system, a rectification device, a measuring section and a connecting section and can accurately acquire to-be-measured parameters mentioned in the method under the conditionthat flow of the internal flow pipeline is not interfered, and particularly, the corrugated tube balance system can solve the problem of interference influence of a high-pressure pipeline on balance measurement when high-pressure air supply and aerodynamic measurement are performed synchronously in internal resistance measurement tests.

Description

technical field [0001] The invention relates to a method and device for measuring internal flow resistance of an aircraft, in particular to a method and device for measuring internal flow resistance based on a bellows balance system, and belongs to the technical field of aircraft internal flow resistance measurement tests. Background technique [0002] For civil aircraft or transport aircraft using turbofan engines, the shape of the intake and exhaust system must be optimized in the early stage of design. In order to improve design efficiency and reduce design costs, the optimization and selection of the shape of the intake and exhaust system in engineering Consider dynamical effects. Usually the air inlet inlet of the aircraft dynamometer model with the air inlet is blocked with a blocking cone to make it airtight. Obviously, the aerodynamic coefficient measured in this way is different from the ventilation model, although the special inlet test can accurately simulate the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M9/06B64F5/60
CPCG01M9/06G01M9/062B64F5/60
Inventor 李鹏季军郭大鹏邓祥东宋孝宇
Owner AVIC SHENYANG AERODYNAMICS RES INST
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