Preliminary Experimental Investigation on the Divergent Wall Cooling of Two Dimensional C-D Nozzles at High Speed and Hot Jet Conditions

At high speed and hot exhaust flow conditions,a preliminary experimental investigation on the divergent wall cooling of Two Dimensional C D Nozzle had been conducted.There were three film cooling schemes used,namely,slot,discrete hole and wiggle strip.In the experiment,the infrared radiation and axial distribution of wall temperature and near wall flow pressure were measured with and without film cooling.The results showed:The cooling had significant influence on the near wall flow pressure,and the influence was different with cooling schemes.The infrared radiation and wall temperature were obviously decreased by cooling.There were better benefits through cooling by slot and wiggle strip film cooling.