Inviscid-Viscous Interaction Analysis of Compressor Cascade Performance

[+] Author and Article Information
M. Barnett

Theoretical and Computational Fluid Dynamics, United Technologies Research Center, East Hartford, CT

D. E. Hobbs

Fan and Compressor Technology, Pratt and Whitney, East Hartford, CT

D. E. Edwards

Applied Computational Fluid Dynamics, United Technologies Research Center, East Hartford, CT

J. Turbomach 113(4), 538-552 (Oct 01, 1991) (15 pages) doi:10.1115/1.2929113 History: Received January 05, 1990; Online June 09, 2008


An inviscid-viscous interaction technique for the analysis of quasi-three-dimensional turbomachinery cascades has been developed. The inviscid flow is calculated using a time-marching, multiple-grid Euler analysis. An inverse, finite-difference viscous-layer analysis, which includes the wake, is employed so that boundary layer separation can be modeled. This analysis has been used to predict the performance of a transonic compressor cascade over the entire incidence range. The results of the numerical investigation in the form of cascade total pressure loss, exit gas angle, and blade pressure distributions are compared with existing experimental data and Navier–Stokes solutions for this cascade, and show that this inviscid-viscous interaction procedure is able to predict cascade loss and airfoil pressure distributions accurately. Several other aspects of the present interaction analysis are examined, including transition and wake modeling, through comparisons with data.

Copyright © 1991 by The American Society of Mechanical Engineers
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