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Research and optimization for flow loss of a small partial admission subsonic turbine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2017年01期
Page:
32-37
Research Field:
研究与设计
Publishing date:

Info

Title:
Research and optimization for flow loss of a small partial admission subsonic turbine
Author(s):
ZHENG Xiaoyu; LIN Qiyan; WANG Lei
Beijing Aerospace Propulsion Institute, Beijing 100076, China
Keywords:
subsonic turbine; partial admission; flow field; optimization
PACS:
V430-34
DOI:
-
Abstract:
In order to expand the application of a small partial admission subsonic turbine,its aerodynamic performance is required to be improved further.The commercial use CFD software Numeca is used to build an entire annular domain grid of the prototype partial admission turbine flow path and conduct a viscid numerical simulation of flow field.In contrast with the flow field of the full admission turbine with the same blade profile,the flow loss distribution and flow mechanism of the partial admission subsonic turbine were revealed.On the basis of research on flow field,the moving blade of the prototype turbine was remodeled and optimized,changing it from impulse shape to slight reaction shape.The result of the flow field simulation indicates that the turbine efficiency is increased by 5％.The comparison and analysis of aerodynamic parameter distributions of the two partial admission turbines show that the blade shape of the slight reaction can reduce backflow loss in the flow path in non-admission fan-type area of the partial admission turbine,which is beneficial to improvement of turbine performance.This study can offer a reference for the aerodynamic design of the same kind of turbines.

References:

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