MEASUREMENTS OF THE TIP-LEAKAGE FLOW IN A TURBINE CASCADE WITH LARGE CLEARANCES
MEASUREMENTS OF THE TIP-LEAKAGE FLOW IN A TURBINE CASCADE WITH LARGE CLEARANCES
复制标题
大间隙涡轮叶轮叶尖泄漏流的测量
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
S. Sjolander
中科院分区：
文献类型：
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作者：
S. Cecco;M. Yaras;S. Sjolander
CP = =静压系数在一个涡轮机叶栅中，对叶尖间隙进行了测量，测量值达到1 F V Z CL弦的15%，以前曾用于研究较小间隙时的叶尖泄漏流。这项工作是涡轮机空气动力学研究的一部分，这些涡轮机的空气动力学系数经历了在役损坏，并与发动机健康CL监测有关。详细测量了叶栅上下游流场和间隙进口静压（测量了叶片端壁和中跨的压力分布）。最出乎意料的结果是，间隙出口处的C静压系数（吸入叶片端部损失（即二次侧损失和叶尖泄漏侧损失之和））在间隙约为弦长的6%时达到最大值。
CP = = static-pressure coefficient Measurements have been made for tip clearances up to 15% of 1 F V Z CL chord in a turbine cascade which has been used previously to study the tip-leakage flow at smaller clearances. The work is part of a study of the aerodynamics of turbines which have coefficient experienced in-service damage and is related to Engine Health CL Monitoring. Detailed flow field measurements have been made upstream and downstream of the cascade and static pressure static-pressure at gap inlet (pressure distributions have been measured on the endwall and at the midspan of the blade. The most unexpected result was that the C static-pressure coefficient at gap outlet (suction blade end losses (that is, the sum of the secondary and tip-leakage side) losses) reached a maximum for a clearance of about 6% of chord.