一级半轴流式透平级内部若干非定常流动现象的试验研究

被引：2

作者：

石䶮

丰镇平

机构：

[1] 西安交通大学能源与动力工程学院叶轮机械研究所

来源：

热力透平 | 2012年 / 41卷 / 02期

关键词：

一级半透平级; 非定常流动; 试验研究; 时序效应;

D O I：

10.13707/j.cnki.31-1922/th.2012.02.009

中图分类号：

TK261 [理论];

学科分类号：

080704 ;

摘要：

设计研制了具有亚音速透平高压级气动特性的一级半轴流式试验透平,采用试验方法对时序效应、叶栅壁面非定常静压幅频特性以及动叶出口非定常速度场进行了研究。结果表明:时序效应具有改善轴流式透平气动性能的潜力;动、静叶排压力有势场干涉引发的基频信号和上游静叶尾迹片段引发的两阶倍频信号,构成了第二列静叶壁面静压非定常分量的基本频率特征,其间还伴随高达六阶的倍频信号,主要由动叶尾缘高频脱落的涡街扰动产生;尚未完成掺混的第一列静叶尾迹片段出现在动叶出口,由其引发的负射流显著改变了动叶出口局部位置处的气流偏转角。

引用

页码：106 / 115

页数：10

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