A ram air turbine wind tunnel test method

Abstract

The invention provides a ram air turbine wind tunnel experimental testing method. The method comprises the following steps: 1: installing a ram air turbine model in a wind tunnel test section; 2: determining the inlet control surface of the model in the wind tunnel test section; 3: determining the outlet control surface of the model in the wind tunnel test section; 4: determining the flow line bending control surface of the model in the wind tunnel test section; 5: determining a control body of the model in the wind tunnel test section; 6, determining an inlet measurement point and an outlet measurement point of the wind tunnel test section; 7: reliably communicating the measuring points with a measuring instrument through a connecting pipeline; 8: testing the turbine output power at different pitch angles when the initial wind speed is tested, and calculating and obtaining the turbine efficiency; 9, testing the turbine output power and the turbine efficiency at the initial pitch angleat different wind speeds; 10: testing the turbine output power and the turbine efficiency at different blade pitch angles at different wind speeds. The field flow internal field treatment is realized, and the capability of researching the power performance of the ram air turbine by utilizing a wind tunnel test is improved.

Description

technical field [0001] The invention provides a ram air turbine wind tunnel test method, in particular to a ram air turbine wind tunnel test method based on a compressible fluid far-field opening system, which belongs to the ram air turbine wind tunnel test technology field. Background technique [0002] The ram air turbine system is an emergency power device for modern aircraft, which can provide emergency energy and ensure flight safety in an emergency when the aircraft loses its active power and auxiliary power. Among them, the turbine rotates under the action of the oncoming airflow and converts the ramming energy of the airflow into mechanical energy, which is the energy extraction part of the system. Therefore, the output power and energy extraction efficiency of the ram air turbine are the core of the system research and also the key indicators of the aerodynamic performance of the turbine. The research methods of ram air turbine aerodynamic performance mainly inclu...

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Problems solved by technology

[0012] The purpose of the present invention is to provide a ram air turbine wind tunnel test method, and the technical problem to be solved is to provide a ram air turbine external flow internal field treatment wind tunnel test method based on the compressible fluid far field opening system , it can overcome the problems existing in the prior art that the ram air turbine efficiency cannot be obtained through the ground wind tunnel test, the calculation results of the lift coefficient and drag coefficient must be corrected according to experience in the turbine blade airfoil test, and the airflow at the trailing edge wake of the model is not considered In view of the lack of speed influence, a ram air turbine wind tunnel test method based on the compressible fluid far-field opening system is proposed, which realizes the internal field processing of the external field parameters and lays the foundation for the research on the dynamic performance of ram air turbines.

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