Accession Number:

AD0770571

Title:

Investigation of Two-Dimensional Cavity Diffusers,

Descriptive Note:

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:

1973-10-01

Pagination or Media Count:

18.0

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 13 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