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EFFECT OF SQUEALER GEOMETRY ARRANGEMENT ON GAS TURBINE BLADE TIP HEAT TRANSFER

机译:消音器几何形状布置对燃气轮机叶片尖端传热的影响

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摘要

This study investigates the effect of a squealer tip geometry arrangement on heat transfer coefficient and static pressure distributions on a gas turbine blade tip in a five-bladed stationary linear cascade. A transient liquid crystal technique is used to obtain detailed heat transfer coefficient distribution. The test blade is a linear model of a tip section of the GE E3 high-pressure turbine first stage rotor blade. Six tip geometry cases are studied: 1) squealer on pressure side, 2) squealer on mid camber line, 3) squealer on suction side, 4) squealer on pressure and suction sides, 5) squealer on pressure side plus mid camber line, and 6) squealer on suction side plus mid camber line. The flow condition corresponds to an overall pressure ratio of 1.32 and exit Reynolds number based on axial chord of l.lXl0~6. Results show that squealer geometry arrangement can change the leakage flow and results in different heat transfer coefficients to the blade tip. A squealer on suction side provides a better benefit compared to that on pressure side or mid camber line. A squealer on mid camber line performs better than that on a pressure side.
机译:这项研究调查了五叶片固定线性叶栅中,漏油器叶尖的几何形状布置对燃气涡轮叶片叶尖上的传热系数和静压分布的影响。瞬态液晶技术用于获得详细的传热系数分布。测试叶片是GE E3高压涡轮第一级转子叶片顶端部分的线性模型。研究了六个尖端几何形状情况:1)压力侧上的泄油器,2)中弧度线上的泄油器,3)吸力侧的泄油器,4)压力和吸力侧的泄油器,5)压力侧加中弧度线的泄油器,和6)吸气器上的榨油器加上中弧线。流动条件对应于1.32的总压力比和基于1.1×10-6的轴向弦的出口雷诺数。结果表明,尖叫器的几何结构可以改变泄漏流量,并导致不同的叶尖传热系数。与压力侧或中弧线相比,吸气侧的尖叫器具有更好的优势。中弧线的尖叫声比压力侧的尖叫声表现更好。

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