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首页> 外文期刊>Bulletin of GTSJ >Effects of wake: blade interaction upon aerodynamic performance of a turbine linear cascade, 1st report: time-averaged aerodynamic performance
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Effects of wake: blade interaction upon aerodynamic performance of a turbine linear cascade, 1st report: time-averaged aerodynamic performance

机译：尾流：叶片相互作用对涡轮线性叶栅空气动力性能的影响，第一份报告：时间平均空气动力性能

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摘要

Detailed investigations are conducted on aerodynamic loss of a linear turbine cascade which is subjected to periodic wakes shed from moving bars of the wake generator. The purpose of the study is to clarify how and to what extent upstream wakes affect the aerodynamic performance of the subsequent blades and vanes in turbo-machines. This report focuses on the measurements by use of a pneumatic five-hole yawmeter, which provides time-averaged stagnation pressure distributions and spanwise exit flow angle distributions downstream of the moving bars as well as of the turbine cascade. Parameters related to the wake, such as wake passing frequency (wake Strouhal number) or wake turbulence characteristics, are varied to see how these wake-related parameters alter the local loss distribution or mass-averaged loss coefficient of the turbine cascade. Effects of free-stream turbulence intensity are also examined.
机译：对线性涡轮机叶栅的空气动力损失进行了详细研究，该线性涡轮机叶栅受到来自尾流发生器的运动杆的周期性尾流的影响。该研究的目的是弄清上游尾流如何以及在多大程度上影响随后的涡轮机叶片和叶片的空气动力性能。该报告重点介绍了使用气动五孔偏航仪进行的测量，该仪提供了动杆和涡轮叶栅下游的平均时滞压力分布和翼展方向出口流角分布。改变与尾流有关的参数，例如尾流通过频率（尾气Strouhal数）或尾流湍流特性，以了解这些尾流相关参数如何改变涡轮机叶栅的局部损耗分布或质量平均损耗系数。还检查了自由流湍流强度的影响。

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