Effect of rib on suddenly expanded supersonic flow

Abstract

The base pressure field and the wall pressure distribution along the newlineenlarged duct for subsonic correctly underexpanded sonic and supersonic newlineflow at different expansion have been studied experimentally For generation newlineof subsonic Mach number and correctly underexpanded sonic flows a newlineconvergent nozzle was used and for supersonic flow generation a convergent newlinedivergent nozzle of suitable area ratio was employed The flow from these newlineaxisymmetric nozzles was suddenly expanded into a straight tube of larger newlinecross section area than the nozzle exit area The ratio of enlarged duct area to newlinenozzle exit area was 484 in the present investigation For all the experimental newlineruns the flow through enlarged duct was discharged into the ambient atmosphere newline newline