CUED Publications database

Effect of blade tip geometry on the tip leakage flow in axial turbine cascades

Heyes, FJG and Hodson, HP and Dailey, GM (1992) Effect of blade tip geometry on the tip leakage flow in axial turbine cascades. Journal of Turbomachinery, 114. pp. 643-651. ISSN 0889-504X

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Abstract

The phenomenon of tip leakage has been studied in two linear cascades of turbine blades. The investigation includes an examination of the performance of the cascades with a variety of tip geometries. The effects of using plain tips, suction side squealers, and pressure side squealers are reported. Traverses of the exit flow field were made in order to determine the overall performance. A method of calculating the tip discharge coefficients for squealer geometries is put forward. In linking the tip discharge coefficient and cascade losses, a procedure for predicting the relative performance of tip geometries is developed. The model is used to examine the results obtained using the different tip treatments and to highlight the important aspects of the loss generation process.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Turbomachinery
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:22
Last Modified: 22 Dec 2014 01:15
DOI: