Effect of Inlet Flow Distortion on Performance of Vortex Controlled Diffusers

[+] Author and Article Information
R. K. Sullerey

Aerospace Engineering, Indian Institute of Technology, Kanpur, India

V. Ashok, K. V. Shantharam

Vikram Sarabhai Space Center, Trivandrum, India

J. Fluids Eng 114(2), 191-197 (Jun 01, 1992) (7 pages) doi:10.1115/1.2910015 History: Received February 01, 1990; Online May 23, 2008


The present experimental investigations are concerned with diffusers employing the concept of vortex control to achieve high pressure recovery in a short length. Two types of two-dimensional diffusers have been studied, namely, vortex controlled and hybrid diffusers. Investigations have been carried out on such short diffusers with symmetrically and asymmetrically distorted inlet velocity profiles for area ratios 2.0 and 2.5 and divergence angle of 30 and 45 deg at a Reynolds number of 105 . For each of the above configurations, experiments have been carried out for a range of fence subtended angles and bleed rates. The results indicate improvement in diffuser effectiveness up to a particular bleed off for both types of diffusers. It was observed that the nature of exit velocity profiles could be controlled by differential bleed.

Copyright © 1992 by The American Society of Mechanical Engineers
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