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research-article

The effect of non-equilibrium boundary layers on compressor performance

[+] Author and Article Information
Andrew P S Wheeler

Whittle Laboratory, Department of Engineering, Cambridge University, Cambridge, UK
aw329@cam.ac.uk

Anthony Dickens

Whittle Laboratory, Department of Engineering, Cambridge University, Cambridge, UK
amjd2@cam.ac.uk

Robert Miller

Whittle Laboratory, Department of Engineering, Cambridge University, Cambridge, UK
rjm76@cam.ac.uk

1Corresponding author.

ASME doi:10.1115/1.4040094 History: Received March 12, 2018; Revised April 13, 2018

Abstract

The paper investigates the effect of non-equilibrium behaviour of boundary layers on the profile loss of a compressor. The investigation is undertaken using both high fidelity simulations of a mid-height section of a compressor blade and a reduced order model, MISES. The solutions are validated using experimental measurements made in the embedded stage of a multistage low speed compressor. The paper shows that up to 35% of the suction surface boundary layer of the compressor blade exhibits non-equilibrium behaviour. The size of this region reduces as the Reynolds number is increased. The size of this region reduces as the Reynolds number is increased. The non-equilibrium behaviour was found to reduce profile loss in cases of attached transition and raise loss where transition occurs through separation.

Copyright (c) 2018 by ASME
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