Numerical Simulation Method with Engine Power and Analysis of Jet Interaction

Abstract To explore the effects of engine jet on overall aircraft aerodynamic performance, an numerical simulation method and interference with wing-mounted nacelle were studied. In aspect simulation, based isentropic flow relationship automatic mass-flow matching method, a high-precision / high-efficiency inlet exhaust boundary conditions is achieved. The calculation result in good agreement experimental values, which validates condition treatment. Through it found that ejection can accelerate air flow, reduce lower wing pressure, enhance upper shock wave increase pitch down moment. At same time, effect brings blowing drag loses cruise efficiency. airflow acceleration caused by narrow channel composed engine, pylon may cause strong interference. It be effectively weakened adjusting contraction shape near-field pressure distribution. this way, inner side also eliminated.