Accession Number : ADA299900

Title :   Pseudo-Time Method for Optimal Shape Design Using the Euler Equations.

Descriptive Note : Contract rept.,

Corporate Author : INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Personal Author(s) : Iollo, Angelo ; Kuruvila, Geojoe ; Ta'asan, Shlomo

PDF Url : ADA299900

Report Date : AUG 1995

Pagination or Media Count : 24

Abstract : In this paper we exploit a novel idea for the optimization of flows governed by the Euler equations. The algorithm consists of marching on the design hypersurface while improving the distance to the state and costate hypersurfaces. We consider the problem of matching the pressure distribution to a desired one, subject to the Euler equations, both for subsonic and supersonic flows. The rate of convergence to the minimum for the cases considered is 3 to 4 times slower than that of the analysis problem. Results are given for Ringleb flow and a shockless recompression case.

Descriptors :   *OPTIMIZATION, *SHAPE, *EULER EQUATIONS, COMPRESSION, ALGORITHMS, RATES, TIME, SHOCK, CONVERGENCE, FLOW, SUBSONIC FLOW, SUPERSONIC FLOW, RANGE(DISTANCE), MATCHING, PRESSURE DISTRIBUTION, PSEUDO RANDOM SEQUENCES.

Subject Categories : Numerical Mathematics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE