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Application of a lower-upper implicit scheme and an interactive grid generation for turbomachinery flow field simulationsA finite-volume lower-upper (LU) implicit scheme is used to simulate an inviscid flow in a tubine cascade. This approximate factorization scheme requires only the inversion of sparse lower and upper triangular matrices, which can be done efficiently without extensive storage. As an implicit scheme it allows a large time step to reach the steady state. An interactive grid generation program (TURBO), which is being developed, is used to generate grids. This program uses the control point form of algebraic grid generation which uses a sparse collection of control points from which the shape and position of coordinate curves can be adjusted. A distinct advantage of TURBO compared with other grid generation programs is that it allows the easy change of local mesh structure without affecting the grid outside the domain of independence. Sample grids are generated by TURBO for a compressor rotor blade and a turbine cascade. The turbine cascade flow is simulated by using the LU implicit scheme on the grid generated by TURBO.
Document ID
19890005706
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Choo, Yung K.
(NASA Lewis Research Center Cleveland, OH., United States)
Soh, Woo-Yung
(Sverdrup Technology, Inc., Cleveland OH., United States)
Yoon, Seokkwan
(MCAT Inst. Moffett Field, CA., United States)
Date Acquired
September 5, 2013
Publication Date
January 1, 1989
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-101412
NAS 1.15:101412
E-4374
Meeting Information
Meeting: International Gas Turbine and Aeroengine Congress and Exposition
Location: Toronto, Ontario
Country: Canada
Start Date: June 4, 1989
End Date: June 8, 1989
Sponsors: American Society of Mechanical Engineers
Accession Number
89N15077
Funding Number(s)
PROJECT: RTOP 505-62-21
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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