Experimental and numerical investigation of dual bell nozzle flow under realistic flight conditions (K02*)

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The first funding phases focused on the understanding and predicting of flow phenomena in dual bell noz-zles, first on a fundamental level, then on hot flow combustion and CFD level. For qualification as main stage engine nozzle, the dual bell must be studied under realistic flight conditions. Therefore, cold flow investigations on ambient air pressure fluctuations and contour ovalization effect on transitional behaviour will be conducted and a technology demonstration on hot flow tests of C/C-SiC nozzle realized. Based on the gained insight, contour optimization and flight trajectory calculation will be conducted for future potential Ariane configurations.