基于多流路体积力模型的翼身融合布局飞机计算方法

In view of the simulation method for blended wing body (BWB) aircraft integration with distributed propulsion system that has the problem of costly computing resources, a simulation method for BWB aircraft based on streamwise body force model with multiple flow paths was presented. Through replacing the force of blade on the airflow by the source term, the streamwise body force model was established. Considering the coupling between the distributed propulsion system and BWB aircraft, each compressor system area was replaced by the body force source term. Thus, the multi-flow path streamwise body force model was proposed. It was applied to the numerical simulation for a large-scale BWB aircraft with distributed propulsion system, and the result showed that compared with the traditional full cycle numerical simulation, the multi-flow path streamwise body force method could greatly save computing resource and improve calculation efficiency by more than 10 times under the condition of acceptable simulation accuracy.