Accession Number:

ADA248458

Title:

Ehplicit Navier-Stokes Computation of Turbomachinery Flows

Descriptive Note:

Final rept. 1 Aug 1986-31 Dec 1991,

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK TURBOMACHINERY LAB

Report Date:

1992-01-01

Pagination or Media Count:

23.0

Abstract:

A new three-dimensional explicit Navier-Stokes procedure was developed for computation of turbulent turbomachinery flows. Several numerical strategies and modelling techniques were developed and incorporated which enable convergent and accurate predictions of high Reynolds number flow fields across a wide range of Mach numbers. These include incorporation of a compressible low Reynolds number form of the k-e turbulence model in a fully explicit fashion, appropriate stability bound treatment of the transport turbulence model and other physical and solution parameters, eigenvalue and local velocity artificial dissipation scalings, a compact flux evaluation procedure and a hybrid low Reynolds number k-e algebraic Reynolds stress model. This report provides a summary of this research. In what follows, primary research findings are summarized details provided in cited references by the present authors, and several sample turbomachinery application results are provided. Specifically, two-dimensional results are provided for a supersonic compressor cascade operating at unique incidence condition. Three-dimensional validation is provided by a high Reynolds number axial rotor flow, for which extensive experimental data is available. This large scale computation is shown to capture rotational inviscid, blade and endwall boundary layer and wake flow physics, including spanwise mixing effects, with good accuracy. Finally, a backswept transonic centrifugal compressor flow, for which L2F meridional passage velocity measurements are available, was computed. Such flows are the most complex that exist in turbomachines.

Subject Categories:

  • Hydraulic and Pneumatic Equipment
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE