
Accession Number : ADA113638
Title : Development of a Locally Mass Flux Conservative Computer Code for Calculating 3D Viscous Flow in Turbomachines.
Descriptive Note : Final contractor rept.,
Corporate Author : THERMO MECHANICAL SYSTEMS CO CANOGA PARK CALIF
Personal Author(s) : Walitt,Leonard
PDF Url : ADA113638
Report Date : Apr 1982
Pagination or Media Count : 118
Abstract : The VANS successive approximation numerical method has been extended to the computation of 3D, viscous, transonic flows in turbomachines. The principal development reported herein is the generation of a crosssectional computer code, which conserves mass flux at each point of the crosssectional surface of computation. In the VANS numerical method, the crosssectional computation follows a bladetoblade calculation. The VANS bladetoblade code was developed earlier. Numerical calculations were made for an axial annular turbine cascade and a transonic, centrifugal impeller with splitter vanes. The subsonic turbine cascade computation was generated in bladetoblade surfaces to evaluate the accuracy of the bladetoblade mode of marching. Calculated blade pressures at the hub, mid, and tip radii of the cascade agreed with corresponding measurements. The transonic impeller computation was conducted to test the newly developed locally mass flux conservative crosssectional computer code. Both bladetoblade and crosssectional modes of calculation were implemented for this problem. A triple point shock structure was computed in the inducer region of the impeller. In addition, timeaveraged shroud static pressures generally agreed with measured shroud pressures. Two principal conclusions are drawn from this research effort: the bladetoblade computation produces a useful engineering flow field in regions of subsonic relative flow, and crosssectional computation, with a locally mass flux conservative continuity equation, is required to compute the shock waves in regions of supersonic relative flow. (Author)
Descriptors : *Three dimensional flow, *Viscous flow, *Turbomachinery, Turbine blades, Cascade structures, Computer programming, Navier Stokes equations, Cascades(Fluid dynamics), Flow fields, Computations
Subject Categories : Fluid Mechanics
Jet and Gas Turbine Engines
Distribution Statement : APPROVED FOR PUBLIC RELEASE