CUED Publications database

A new alternative for reduction of secondary flows in low pressure turbines

Torre, D and De La Rosa Blanco, E and Vázquez, R and Hodson, HP (2006) A new alternative for reduction of secondary flows in low pressure turbines. Proceedings of the ASME Turbo Expo, 6 PART. pp. 883-892.

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Abstract

This paper describes a new flow mechanism for the reduction of secondary flows in Low Pressure Turbines using the benefit of contoured endwalls. The extensive application of contoured endwalls in recent years has provided a deeper understanding of the physical phenomenon that governs the reduction of secondary flows. Based on this understanding, the endwall geometry of a linear cascade of solid-thin profiles typical of Low Pressure Turbines has been redesigned. Experimental data are presented for the validation of this new solution. Based on these data, a reduction of 72% in the SKEH and 20% in the mixed-out endwall losses can be obtained. CFD simulations are also presented to illustrate the effect of the new endwall on the secondary flows. Furthermore, an explanation of the flow mechanism that governs the reduction of the SKEH and the losses is given. Copyright © 2006 by ASME.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Turbomachinery
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 12:15
Last Modified: 27 Nov 2014 05:53
DOI: 10.1115/GT2006-91002