Abstract
Experimental investigation were conducted into the pressure recovery of a two-dimensional short subsonic diffuser with passive boundary-layer control, to determine the effectiveness of such a control at high inlet turbulence. The passive control configuration consisted of a porous surface made of normal or inclined slots (located on the diverging walls of the diffuser) which were connected by a breather passage. The results showed that passive control improves pressure recovery and postpones flow separation (stall) in the diffusers and the effectiveness of the passive control was enhanced by the inlet turbulence. Nomenclature AR aspect ratio, L/W; B, inlet blockage, 28*AV; cp pressure coefficient, (p-pj)/qi cPR pressure recovery, (Pe-ft)^2 L length of the diverging walls, m p static pressure, N/m2
Published Version
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