Accession Number:

ADA214848

Title:

Influence of Variation of Aspect Ratio on the Pressure Recovery in Super Sonic Diffusers

Descriptive Note:

Final rept. no. 8, 1 Jan 1977-31 Dec 1978

Corporate Author:

YALE UNIV NEW HAVEN CT DEPT OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s):

Report Date:

1979-02-01

Pagination or Media Count:

21.0

Abstract:

A systematic investigation was made of the gasdynamics of supersonic diffusers, in particular, diffusers applicable to gasdynamic or other types of flow lasers. The main conclusion was that almost all the research on supersonic diffusers was performed with specific application, namely a specific wind tunnel installation or an engine, in mind. Systematic studies on the gasdynamics of diffusers even of simple geometries were scarce, making it difficult, if not impossible, to extend existing work to other configurations. Despite the fact that some of the high Mach number wind tunnels operated with known unequilibrated internal modes, there was no research on nonequilibrium flow effects in diffusers in the literature consulted. Moreover, in most conventional wind tunnels, the cross-section of the test section is either circular or squarish. Consequently, most diffuser studies were concerned with circular, square, or rectangular cross-sections with comparable widths and heights, characterized by an aspect ratio, defined as the width to height ratio, of unity or close to unity.

Subject Categories:

  • Lasers and Masers
  • Hydraulic and Pneumatic Equipment
  • Test Facilities, Equipment and Methods
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE