Title page for ETD etd-92797-183746


Type of Document Master's Thesis
Author Cahill, Joseph E.
Author's Email Address sboller@vt.edu
URN etd-92797-183746
Title Identification and Evaluation of Loss and Deviation Models for use in Transonic Compressor Stage Performance Prediction
Degree Master of Science
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
O'Brien, Walter F. Jr. Committee Chair
Dancey, Clinton L. Committee Member
Marshall-Baker, Anna Committee Member
Keywords
  • Axial Compressors
  • Deviation
  • Loss
  • Transonic
Date of Defense 1997-09-22
Availability unrestricted
Abstract
The correlation of cascade experimental data is one method for obtaining compressor stage characteristics. These correlations specify pressure loss and flow turning caused by the blades. Current open literature correlations used in streamline curvature codes are inadequate for general application to high-speed transonic axial-flow compressors. The objective of this research was to investigate and evaluate the available correlations and ultimately discover sets of correlations which best fit the empirical data to be used in streamline curvature codes. Correlations were evaluated against experimental data from NASA Rotor 1-B and NASA Stage 35. It was found that no universal set of correlations was valid for minimum-loss point predictions. The Bloch shock loss model showed promising results in the stall regime for supersonic relative inlet Mach numbers. The Hearsey and Creveling off-minimum-loss deviation angle prediction performed consistently better than all other correlations tested.
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