The coupling between the bleed system and the flowfield of a downstream compressor stage is studied using two approaches. In the first approach, three-dimensional, full annulus, unsteady computations simulate the flow in a low-speed research compressor with nonuniform bleed extraction. Comparisons with experimental data show that the flow prediction in the main annulus is accurate to within 0.005 of flow coefficient and of flow angle. The computational fluid dynamics (CFD) is then used to provide a description of flow within the bleed system itself. In the second approach, a two-dimensional mean radius model, similar to that adopted by Hynes and Greitzer in the previous work on compressor stability, is used to simulate the response of the compressor to nonuniform bleed. This model is validated against experimental data for a single-stage compressor, and despite the inherent assumptions (two-dimensional flow and simplified compressor response), provides a satisfactory prediction of the flow for preliminary design purposes with orders of magnitude less computational cost than full 3D CFD. The model is then used to investigate the effect of different levels of bleed nonuniformity and of varying the axial distance between the bleed and the downstream stage. Reducing bleed nonuniformity and moving the stage away from the bleed slot are predicted to reduce the circumferential nonuniformity of the flow entering the stage.
Skip Nav Destination
Article navigation
September 2016
Research-Article
Modeling Nonuniform Bleed in Axial Compressors
S. D. Grimshaw,
S. D. Grimshaw
Whittle Laboratory,
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
e-mail: sdg33@cam.ac.uk
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
e-mail: sdg33@cam.ac.uk
Search for other works by this author on:
G. Pullan,
G. Pullan
Whittle Laboratory,
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
Search for other works by this author on:
T. P. Hynes
T. P. Hynes
Whittle Laboratory,
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
Search for other works by this author on:
S. D. Grimshaw
Whittle Laboratory,
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
e-mail: sdg33@cam.ac.uk
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
e-mail: sdg33@cam.ac.uk
G. Pullan
Whittle Laboratory,
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
T. P. Hynes
Whittle Laboratory,
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
University of Cambridge,
1 JJ Thomson Avenue,
Cambridge CB3 0DY, UK
Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the JOURNAL OF TURBOMACHINERY. Manuscript received January 29, 2016; final manuscript received February 15, 2016; published online April 12, 2016. Editor: Kenneth C. Hall.
J. Turbomach. Sep 2016, 138(9): 091010 (11 pages)
Published Online: April 12, 2016
Article history
Received:
January 29, 2016
Revised:
February 15, 2016
Citation
Grimshaw, S. D., Pullan, G., and Hynes, T. P. (April 12, 2016). "Modeling Nonuniform Bleed in Axial Compressors." ASME. J. Turbomach. September 2016; 138(9): 091010. https://doi.org/10.1115/1.4032845
Download citation file:
Get Email Alerts
Evaluating Thin-Film Thermocouple Performance on Additively Manufactured Turbine Airfoils
J. Turbomach (July 2025)
Thermohydraulic Performance and Flow Structures of Diamond Pyramid Arrays
J. Turbomach (July 2025)
Related Articles
Loss and Deviation in Windmilling Fans
J. Turbomach (October,2016)
Experimental and Numerical Investigation of a Circumferential Groove Casing Treatment in a Low-Speed Axial Research Compressor at Different Tip Clearances
J. Turbomach (December,2017)
High Resolution RANS Nonlinear Harmonic Study of Stage 67 Tip Injection Physics
J. Turbomach (May,2015)
Related Chapters
Boundary Layer Analysis
Centrifugal Compressors: A Strategy for Aerodynamic Design and Analysis
Pulsation and Vibration Analysis of Compression and Pumping Systems
Pipeline Pumping and Compression Systems: A Practical Approach, Second Edition
Pulsation and Vibration Analysis of Compression and Pumping Systems
Pipeline Pumping and Compression System: A Practical Approach, Third Edition