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Automated Calibration of Compressor Loss and Deviation Correlations

Schnoes, Markus and Nicke, Eberhard (2015) Automated Calibration of Compressor Loss and Deviation Correlations. ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, 15-19 June 2015, Montreal, Canada. DOI: 10.1115/GT2015-42644 ISBN 978-0-7918-5663-5

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Abstract

Throughout preliminary design of multistage axial compressors performance prediction is based on fast 2D throughflow codes incorporating models for loss, deviation and secondary flow effects. To achieve high solution quality these models have to be calibrated on experimental or simulation data. Particularly 2D cascade loss and deviation correlations are of major importance. Correlations available in literature are mostly based on data from early cascade wind tunnel tests of NACA-65 and DCA profile families. In general, calibrations for state-of-the-art airfoil shapes are not published. This paper describes a methodology to re-calibrate parameters of well-known empirical loss and deviation correlations to CFD simulations of compressor cascades. Correlations describing choke incidence, on- and off-design loss and deviation are presented, resolving dependencies on inlet flow angle, Mach number, Reynolds number and MVDR. Based on a set of loss and deviation polars, nonlinear least-squares problems are solved to determine the empirical parameters. By including shock losses and choking incidence, the model is suited for subsonic as well as supersonic inlet conditions. Results of the calibration process are shown for two state-of-the-art compressor cascades. The overall model is evaluated on a sub- and a transonic compressor as well as on a transonic fan comparing throughflow results with 3D CFD and experimental data. A high level of automation makes the methodology applicable to arbitrary profile families or in combination with programs for parametric airfoil design.

Item URL in elib:https://elib.dlr.de/100262/
Document Type:Conference or Workshop Item (Speech)
Title:Automated Calibration of Compressor Loss and Deviation Correlations
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schnoes, Markusmarkus.schnoes (at) dlr.deUNSPECIFIED
Nicke, Eberhardeberhard.nicke (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.1115/GT2015-42644
ISBN:978-0-7918-5663-5
Status:Published
Keywords:Compressors, Calibration, Throughflow, Correlations, Empirical
Event Title:ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
Event Location:Montreal, Canada
Event Type:international Conference
Event Dates:15-19 June 2015
Organizer:American Society of Mechanical Engineers
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Fan and Compressor
Deposited By: Schnös, Markus
Deposited On:07 Dec 2015 13:07
Last Modified:10 May 2016 23:36

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