Title

Purge And Mainstream Flow Interaction Control By Means Of Platform Circumferential Contouring

Abstract

This study presents an attempt to reduce the losses produced by the purge flow in a turbine stage by incorporating circumferential platform contouring. Two contours are proposed and compared against a baseline at different levels of swirl. The computational simulations were performed using a RANS three-dimensional Computational Fluid Dynamics code with the Shear Stress Transport turbulence model. The results of steady simulations demonstrate that for the first contour, when the flow is swirled to 50% of the rim speed, the purge flow exits the cavity with less cross flow. This in turn reduces the strength of the passage vortex. However, at swirl extremes of 0% and 100% the baseline has the best perfomance. The results show that a carefully desgined platform could reduce losses when the operating condition is in the proximity of 50% swirl. © 2011 by Siemens Energy, Inc.

Publication Date

12-1-2011

Publication Title

47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and Exhibit 2011

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84880672006 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84880672006

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