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首页> 外文会议>ASME Turbo Expo vol.6 pt.A; 20050606-09; Reno-Tahoe,NV(US) >THE INTERACTION OF TURBINE INTER-PLATFORM LEAKAGE FLOW WITH THE MAINSTREAM FLOW
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THE INTERACTION OF TURBINE INTER-PLATFORM LEAKAGE FLOW WITH THE MAINSTREAM FLOW

机译：涡轮机平台间泄漏流与主流的相互作用

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摘要

Individual nozzle guide vanes (NGVs) in modern aero engines are often cast as a single piece with integral hub and casing endwalls. When in operation there is a leakage flow through the chord-wise inter-platform gaps. An investigation into the effect of this leakage flow on turbine performance is presented. Efficiency measurements and NGV exit area traverse data from a low speed research turbine are reported. Tests show that this leakage flow can have a significant impact on turbine performance, but that below a threshold leakage fraction this penalty does not rise with increasing leakage flow rate. The effect of various seal clearances are also investigated. Results from steady-state simulations using a three-dimensional multiblock RANS solver are presented with particular emphasis paid to the physics of the mainstream/leakage interaction and the loss generation.
机译：现代航空发动机中的单个喷嘴导向叶片（NGV）通常与一体式的轮毂和壳体端壁铸成一体。在运行时，通过弦向平台间间隙会产生泄漏流。对此泄漏流对涡轮性能的影响进行了研究。报告了来自低速研究涡轮的效率测量和NGV出口面积遍历数据。测试表明，这种泄漏流量会对涡轮机性能产生重大影响，但在阈值泄漏分数以下时，此损失不会随着泄漏流量的增加而增加。还研究了各种密封间隙的影响。提出了使用三维多块RANS求解器的稳态仿真结果，并特别强调了主流/泄漏相互作用和损耗的产生。

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