Blade Row Interaction in a Multistage Low-Pressure Turbine
Blade Row Interaction in a Multistage Low-Pressure Turbine
复制标题
多级低压涡轮机叶片排相互作用
DOI：
10.1115/91-gt-283
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
N. Arndt
中科院分区：
文献类型：
--
作者：
N. Arndt
这项工作的目的是加强对多级低压涡轮机中非定常流动现象的理解。为此，在五级低压涡轮机的每个转子叶片排的下游进行热膜探针测量。转子-转子相互作用和定子-转子相互作用被观察到对通过低压涡轮机的流动具有深远的影响。不同涡轮机级的转子之间的相互作用是由于一个转子叶片排排出的尾流对通过下一个下游转子叶片排的流动的影响而发生的。这种尾流诱导的转子-转子相互作用导致每个转子叶片排（最上游的除外）下游的强烈调幅周期性和湍流速度波动。在不同的周向位置，在每个转子叶片排下游测得的明显不同的尾流深度和湍流水平证明了周向不均匀定子出口流对下一个下游转子叶片排的影响。定子-转子相互作用也强烈地影响转子尾流的翻转和欠转，转子尾流由转子二次流引起，在转子端壁区域。低转子尾流翻转和欠转，即，减少转子二次流的影响，观察到与低转子尾流湍流度相关。版权所有© 1991年，ASME
The objective of this work was to enhance the understanding of unsteady flow phenomena in multistage low-pressure turbines. For this purpose, hot-film probe measurements were made downstream of every rotor blade row of a five-stage low-pressure turbine. Rotor-rotor interaction and stator-rotor interaction were observed to have a profound influence on the flow through the low-pressure turbine. Interaction of rotors of different turbine stages occurred owing to the influence of the wakes shed by one rotor blade row upon the flow through the next downstream rotor blade row. This wake-induced rotor-rotor interaction resulted in strongly amplitude-modulated periodic and turbulent velocity fluctuations downstream of every rotor blade row with the exception of the most upstream one. Significantly different wake depths and turbulence levels measured downstream of every rotor blade row at different circumferential positions evidenced the effect of the circumferentially nonuniform stator exit flow upon the next downstream rotor blade row. Stator-rotor interaction also strongly influenced the overturning and the underturning of the rotor wakes, caused by the rotor secondary flows, in the rotor endwall regions. Low rotor wake overturning and underturning, i.e., reduced rotor secondary flow influence, were observed to correlate well with low rotor wake turbulence levels.Copyright © 1991 by ASME