Effects of Transverse Ribs on Pressure Recovery in Two-Dimensional Subsonic Diffusers.
Final rept. Jul-Nov 71,
AIR FORCE AERO PROPULSION LAB WRIGHT-PATTERSON AFB OHIO
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An experimental investigation was conducted to evaluate the performance of two-dimensional ribbed diffusers. Static pressure recovery of a straight wall diffuser and a corresponding ribbed diffuser was obtained over a wide range of diffuser total angles and subsonic Mach numbers for three diffuser length-to-throat width ratios. At selected geometries, total pressure recovery and distortion index were obtained. In addition to an optimum rectangular rib design, obtained from earlier water table flow visualization test, a chamfered rib and a roughened surface insert were also tested. A high response pressure transducer was used to detect pressure fluctuations occurring within one of the inter-rib cavities.
- Fluid Mechanics