跨音速透平叶片尾缘流动状态的试验研究

Experimental Flow Study of Trailing Edge Effects of Transonic Turbine Blades

本文叙述了在跨音速风洞中模拟跨音速透平叶片尾缘流动的试验结果.分析了跨音速透平叶片尾缘流动的机理.说明了诸如附面层、叶片尾缘厚度、来流马赫数等因素对尾缘死水区基压的影响.提出通过改变尾缘形状来改善跨音速叶栅气动特性的途径.

The paper describes experimental flow study results of trailing edges of transonic turbine blades in a closed transonic wind tunnel with discussing its mechanism. The effects of such factors as boundary layer, upstream Mach number, trailing edge thick- ness, etc. on the base pressure behind the trailing edge are presented, accompanied by suggestions of improving cascade performance by trailing edge shape modifications. 8 figs, 1 table and 15 refs.