V/STOL Oriented Aerodynamic Studies.
Progress rept. 1 Oct 71-30 Sep 72,
ILLINOIS INST OF TECH CHICAGO DEPT OF MECHANICS MECHANICAL AND AEROSPACE ENGINEERING
Pagination or Media Count:
Besides refinements of 71 results, the following advances are noteworthy. A modular approach to complex flow phenomena was developed and illustrated for flows around proturberances and for control of free-stream turbulence. A new, multiply linear and nonlinear mechanism of transition downstream of isolated roughness elements was documented in detail. The previously developed technique for high-Reynolds number simulation was applied to wind-tunnel simulation of atmospheric boundary layers. Adaption of a small water tunnel led to detailed comparisons of two-dimensional unsteady separation and stall phenomena over airfoils oscillating in pitch, airfoils with oscillating flaps, and inclined fixed airfoils in periodically surging streams. Response of flows with locally separated pockets to periodic modulation of the free stream was documented. Author Modified Abstract