0
research-article

THE EFFECTS OF COMBUSTOR COOLING FEATURES ON NOZZLE GUIDE VANE FILM COOLING EXPERIMENTS

[+] Author and Article Information
Nicholas Holgate

Department of Engineering Science, University of Oxford, Oxford, United Kingdom
nicholas.holgate@eng.ox.ac.uk

Peter Ireland

Department of Engineering Science, University of Oxford, Oxford, United Kingdom
peter.ireland@eng.ox.ac.uk

Eduardo Romero

Rolls-Royce plc, Bristol, United Kingdom
eduardo.romero@rolls-royce.com

1Corresponding author.

ASME doi:10.1115/1.4041467 History: Received August 21, 2018; Revised September 05, 2018

Abstract

Recent advances in experimental methods have allowed researchers to study nozzle guide vane film cooling in the presence of combustor dilution ports and endwall films. The dilution injection creates nonuniformities in temperature, velocity, and turbulence, and an understanding of the vane film cooling performance is complicated by competing influences. In this study, dilution port temperature profiles have been measured in the absence of vane film cooling and compared to film effectiveness measurements in the presence of both films and dilution, illustrating the effects of the dilution port turbulence on film cooling performance. It is found that dilution port injection can create significant effectiveness benefits at the difficult-to-cool vane stagnation region due to the more turbulent hot mainstream enhancing the mixing of film coolant jets that have left the airfoil surface. Also explored are the implications of endwall film cooling for infrared vane surface temperature measurements. The reduced endwall temperatures reduce the thermal emissions from this surface, so reducing the amount of extraneous radiation reflected from the vane surface where measurements are being made. The results of a detailed calibration show that the maximum local film effectiveness measurement error could be up to 0.05 if this effect were to go unaccounted for.

Rolls-Royce plc
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In