翼身融合布局机体对发动机进气品质影响

In order to evaluate whether the body has an adverse effect on the engine inflow after the engine is installed, the influence of the BWB300 body on the engine inflow quality at high and low speeds is studied by using the numerical simulation. The results show that at high speed, the influence of the BWB300 body on the engine inlet flow quality is very small, because of the high speed flow at the front of the engine can fully meet the BWB300 intake demand; while at low speed, due to the large engine mass flow inlet demand and the airflow speed is low at the front of engine, if there is flow separation on the surface of the body, the separated flow will be more easy sucked in by the engine, thus reducing its inlet flow quality. Therefore, for the upper mounted engine layout aircraft like BWB300, the engine-airframe integration design should try to avoid the flow separation on its upper surface occurring near the engine location.