Effect of wall suction on the stability of compressible subsonic flows over smooth two-dimensional backward-facing stepsThe effect of suction on the stability of compressible flows over backward-facing steps is investigated. Mach numbers up to 0.8 are considered. The results show that continuous suction stabilizes the flow outside the separation bubble, but it destabilizes the flow inside it. Nevertheless, the overall N factor decreases as the suction level increases due to the considerable reduction of the separation bubble. For the same suction flow rate, properly distributed suction strips stabilize the flow more than continuous suction. The size of the separation bubble, and hence its effect on the instability can be considerably reduced by placing strips with high suction velocities in the separation region.
Document ID
19890043124
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Al-Maaitah, Ayman A. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Nayfeh, Ali H. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)
Ragab, Saad A. (Virginia Polytechnic Institute and State University Blacksburg, United States)