FLOW PROCESSES IN OVEREXPANDED CHEMICAL ROCKET NOZZLES. PART 1: FLOW SEPARATION

摘要

In the design of a rocket motor to be operated in alternating counter-pressure, the condition "no flow separation" plays an important role. This requires a corresponding specification of the nozzle wall-pressure distribution. In order to do this, several effects of multi-dimensional nozzle flow are treated and the various phenomena of flow separation in nozzles are described and compared.nAn investigation of the various published flow separation data permits the specification of various parameters which affect the separation condition. A comparison of experimental data with empirical and theoretical separation prediction methods leads to the choice of suitable equations for the separation criterion. The results are applied to the flow separation prediction of the space shuttle main engine.