高速叶栅在低速状态下的叶型设计及差异研究  

Redesign LP high speed blade at low speed condition by genetic algorithm method

作　　者：刘海建[1] 姚伍平[1] 华如南 鲁民月[1] 曹为午[1] 

机构地区：[1]武汉第二船舶设计研究所,湖北武汉430064

出　　处：《舰船科学技术》2016年第7期54-59,共6页Ship Science and Technology

摘　　要：基于试验成本等原因,常需要把工作在高马赫数下的叶片放到低速风洞进行吹风试验获得叶型的基本气动参数,这样就需要对叶型进行重新设计来弥补由于高低速气体压缩性改变导致的变化。本文对具有高升力系数的低压涡轮叶片T106A进行重新设计,使其在低速状态下能够匹配在高速流场中的载荷分布。在进行叶片的再设计过程中,采用改进全局优化遗传算法。在获得叶片中径位置匹配的同时,对叶顶间隙处的高低速流场进行对比分析,提出对于叶顶间隙处匹配的相关方法。Generally speaking, in order to determine the cascades performance easily and reduce the costs of experiments, it is convenient to carry out tests in low speed tunnels with modified and scaled shape in order to compensate the compressibility. The low pressure turbine airfoil T 106A has been studied in low speed conditions in this paper, and the airfoil has been modified to match the loading distribution at the low speed with high speed by optimization procedure based on genetic algorithm method. In order to matching the leakage flow between the low speed with the high speed, the nonsmooth blade top profile has been proposed.

关 键 词：涡轮叶片 模化 叶顶间隙 

分 类 号：TK472[动力工程及工程热物理—动力机械及工程]