Accession Number : AD0770571

Title :   Investigation of Two-Dimensional Cavity Diffusers,

Corporate Author : AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Stull,Frank D. ; Curran,Edward T. ; Velkoff,Henry R.

Report Date : OCT 1973

Pagination or Media Count : 18

Abstract : An investigation was conducted to determine the flow regimes and performance of 2-D cavity diffusers. Water table flow visualization tests were conducted over a wide range of diffuser divergence angles and diffuser length to throat-width ratios. Air flow tests were conducted from Mach numbers of .06 to .6 on a 1/3 scale model to obtain diffuser performance. Results indicate that a single cavity can delay separation in 2-D straight wall diffusers, but that static pressure recovery is reduced. In both tests self-induced resonance was encountered which can be reasonably predicted by a vortex wave interaction model. (Author)

Descriptors :   *Diffusers, *Subsonic flow, *Cavities, *Two dimensional flow, Flow fields, Performance(Engineering), Flow visualization, Model tests, Mathematical prediction

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE