Accession Number : AD0693037

Title :   A CRITICAL ANALYSIS OF NUMERICAL TECHNIQUES: THE PISTON-DRIVEN INVISCID FLOW

Descriptive Note : Research rept.

Corporate Author : POLYTECHNIC INST OF BROOKLYN FARMINGDALE NY DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Moretti, Gino

PDF Url : AD0693037

Report Date : Jul 1969

Pagination or Media Count : 73

Abstract : A critical analysis of well-known procedures for the computation of one-dimensional shocked flows is made, in order to show the inconveniences of computing finite differences across a discontinuity and to prove that the use of the equations of motion in conservation form does not make the results any more accurate. A technique is developed to treat one-dimensional inviscid problems and it is applied to the problem of an accelerating piston. Practical and safe ways to predict the formation of a shock and to follow it up in its evolution are given.

Descriptors :   *SHOCK WAVES, ACCELERATION, EQUATIONS OF MOTION, NUMERICAL ANALYSIS, ONE DIMENSIONAL FLOW, PISTONS

Subject Categories : Aerodynamics
      Numerical Mathematics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE