A Design Method for the Profiling of End Walls in Turbines

Author:

Hartland Jonathan1,Gregory-Smith David2

Affiliation:

1. Jaguar Cars, Ltd., Coventry, UK

2. University of Durham, England, UK

Abstract

The profiling of end walls in turbines has proved to be effective in reducing secondary flows and losses in turbines, both in cascades and in a turbine representative rig. This paper presents a simple method for the design of end walls using the philosophy that the blade (or rather flow) curvature causes the cross passage pressure gradient, so that mirroring the blade curvature on the end-wall should assist in canceling this effect. Three alternative end-wall profiles have been designed based on the camber line of the blades. From a CFD investigation into the effects of these profiles, they should all be effective in reducing the secondary flow within the cascade. The best profile extended upstream and downstream of the blades to attempt to overcome the problems associated with sharp curvature at inlet and exit from the blade row. For the best profile the CFD predicts a 6% reduction in secondary loss and a 61% reduction in secondary kinetic energy. Whilst the loss predictions are not expected to be accurate, the reduction in secondary kinetic energy is likely to be similar to that achieved if the profile were tested experimentally. Experience with testing of an earlier end wall (Hartland et al [1]) suggests that there is likely to be a substantial reduction in secondary loss accompanying this level of reduction in secondary kinetic energy.

Publisher

ASMEDC

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3