平面叶栅试验件加工工艺对性能测量影响的试验研究

Experimental research on the effect of processing technology of cascade test article on the performance measurement

针对近年来平面叶栅试验研究过程中出现的试验件加工问题,对直叶片加工工艺、有机玻璃栅板加工工艺以及成套叶栅试验件关键参数的检测方法进行了工艺试验和叶栅试验器试验验证。结果表明,综合考虑加工成本和粗糙度对性能的影响规律,建议高速高负荷叶栅叶片表面粗糙度应不低于Ra=1.6。航空有机玻璃的选材、加工工序、工艺以及装配使用不当会导致试验过程中出现应力纹和黑圈,从而对高速状态下的可视化测量造成不利影响。通过改进成套叶栅试验件关键参数的检测方法,试验件加工质量有了较大提升,有助于获得更为准确可靠的性能试验数据。

In order to solve the processing problems of the test article occurred in the cascade experimental research,investigation and study of the processing technologies of the test blade and Aero-Plexiglass sidewall have been carried out through processing test and experimental validation.And then the detection methods of the key parameters are put forward based on trilinear coordinates measuring instrument.It can be seen from the results that considering the processing cost and the effects of the blade surface roughness on the cascade performance,the suitable surface roughness of the blade for high speed and high load cascade is suggested to be not more than Ra=1.6.Stress lines and black areas may appear on the Aero-Plexiglass sidewall due to some factors,such as material selections,manufacturing procedures,processing technologies and improper assembly or use,etc.,which would cause adverse effect on schlieren visual measurement in high speed state.The processing quality of the test article is greatly improved by developing the detection methods of the key parameters,which will be helpful to get more accurate and reliable performance data.