NUMERICAL AND EXPERIMENTAL ANALYSIS OF THE EFFECT OF VARIABLE BLADE ROW SPACING IN A SUBSONIC AXIAL TURBINE

被引：0
作者：
Restemeier, M. [1 ]
Jeschke, P. [1 ]
Guendogdu, Y.
Gier, J.
机构：
[1] Rhein Westfal TH Aachen, Inst Jet Prop & Turbomachinery, D-52062 Aachen, Germany
来源：
PROCEEDINGS OF THE ASME TURBO EXPO 2011, VOL 7, PTS A-C | 2012年
关键词：
SECONDARY FLOW; AERODYNAMICS;
D O I：
暂无
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Numerical and experimental investigations have been performed to determine the effect of a variation of the inter blade row axial gap on turbine efficiency. The geometry used in this study is the 1.5 stage axial flow turbine rig of the Institute of Jet Propulsion and Turbomachinery at RWTH Aachen University. The influence of the blade row spacing on aerodynamics has been analyzed by conducting steady and unsteady RANS simulations as well as measurements in the cold air turbine test rig of the Institute. Both potential and viscous flow interactions including secondary flow were investigated. The results show an aerodynamic improvement of efficiency and favorable spatial distribution of secondary kinetic energy by reduction of the axial gap. It is shown that this relation tends to become less pronounced for multistage turbines.
引用
收藏
页码：1539 / 1550
页数：12
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