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International Journal of Turbo & Jet-Engines

Ed. by Sherbaum, Valery / Erenburg, Vladimir


IMPACT FACTOR 2018: 0.863

CiteScore 2018: 0.66

SCImago Journal Rank (SJR) 2018: 0.211
Source Normalized Impact per Paper (SNIP) 2018: 0.625

Online
ISSN
2191-0332
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Volume 36, Issue 3

Issues

Design and Numerical Analysis of a Forepart Rotation Vane for a Variable Nozzle Turbine

Dengfeng Yang / Dazhong Lao / Ce Yang / Leon Hu / Harold Sun
Published Online: 2017-02-09 | DOI: https://doi.org/10.1515/tjj-2016-0076

Abstract

The influence of nozzle clearance on the flow field for a variable nozzle turbine, and moreover on the turbine stage performance was numerically investigated. Meanwhile, unsteady calculations were also performed to capture the shock waves which were induced by excessive acceleration of the exhaust gas. Aiming at improving the turbine stage performance and mitigating the shock waves, a forepart rotation vane was proposed and investigated in this work. The results indicated that by using the forepart rotation vane, the stage efficiency is increased by 6 % and the shock waves were eliminated successfully at small nozzle openings. Additionally, the intensity of pressure fluctuation that acts on the rotor blades was reduced by mitigation of clearance leakage flow and shock waves, which is beneficial for the reliability of rotor blades.

Keywords: nozzle clearance; shock waves; stage efficiency; shrinkage degree; pressure fluctuation

PACS: 47.85.Gj

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About the article

Received: 2017-01-03

Accepted: 2017-01-29

Published Online: 2017-02-09

Published in Print: 2019-08-27


National Natural Science Foundation of China, (Grant/Award Number: ‘51276017’).


Citation Information: International Journal of Turbo & Jet-Engines, Volume 36, Issue 3, Pages 233–244, ISSN (Online) 2191-0332, ISSN (Print) 0334-0082, DOI: https://doi.org/10.1515/tjj-2016-0076.

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