Theoretical and Experimental Investigation of the Flow at the Inlet of the Vaned Diffuser: For a High Pressure Ratio Centrifugal Compressor |
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1.5/1 Shock position adiabatic efficiency blockage factor blockage variation boundary layer interaction change in throat choking conditions choking element choking mass flow compressor diffuser CPCH decreases CPCH FIG Cptot D-101 diffuser Di-A Di-B Di-C diffuser geometry diffuser outlet diffuser throat divergent channel figure finite difference flow undergoes Fluid mechanics Fort Eustis Freon front fuser increase inlet region inviscid flow M₁ Mach number distribution Mach number evolution mass flow range measured Mach number obtained overall compressor characteristics parameters position Schlieren Pressure pressure ratio centrifugal ratio centrifugal compressor schlieren pictures Schlieren Pressure measurement semi-vaneless space shock boundary layer shock has moved Shock position Schlieren shock strength shock system side walls speed line static pressure coefficient static pressure holes subsonic suction side shape TABLE theoretical and experimental thermocouples throat blockage throat dimensions throat Mach number throat section transonic vane setting angle vaneless and semi-vaneless velocity distribution VERDONK wheel