Accession Number : ADP001929

Title :   Time-Dependent Finite-Difference Simulation of Unsteady Interactive Flows,

Corporate Author : NATIONAL AERONUATICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER

Personal Author(s) : Diewert,George S. ; Bailey,Harry E.

Report Date : 1982

Pagination or Media Count : 13

Abstract : The solution of the time-dependent, Reynolds-averaged, Navier Stokes equations for unsteady, interacting flows by finite-difference algorithms is discussed. Specific examples include 1) unsteady transonic flow over a thick biconvex airfoil, 2) determination of buffet boundaries for a transonic lifting airfoil, 3) the simulation of aileron buzz and 4) dynamic stall. Algorithms considered include explicit methods, mixed (or hybrid) methods, and fully implicit methods. Consideration of time scales for computational stability, computational accuracy, and physical accuracy and the use of time-dependent adaptive meshing to realize computational efficiency are also discussed. (Author)

Descriptors :   *Unsteady flow, Transonic flow, Solutions(General), Algorithms, Navier Stokes equations, Finite difference theory, Transonic airfoils, Time dependence, Interactions, Computerized simulation

Distribution Statement : APPROVED FOR PUBLIC RELEASE