Numerical Research on the Simulation Nacelle of Ejector Engine

Abstract

Abstract The numerical simulation research of single-nozzle center ejector and double-ducted multi-nozzle ejection nacelle was carried out to study the dynamic simulation nacelle under variable working conditions required by advanced aero-engine test technology. The shock wave structure and blocking effect in the supersonic central ejector are analyzed in detail, and the internal flow field characteristics of the ejector under the condition of non-central axisymmetric supersonic ejection were examined. The aerodynamic characteristics of the single-ducted and double-ducted ejector nacelles are studied; and the flow field simulation with analyzation of the inner and outer ducts under the condition of variable duct ratio was carried out. The relevant conclusions obtained from the research can provide theoretical guidance and reference for the analysis of the multi-condition test run of the aero-engine test cell.