Streamwise-body-force-model for rapid simulation combining internal and external flow fields

• 作 者: Cui Rong Li Qiushi Pan Tianyu Zhang Jian
• 机 构: National Key Laboratory on Aero-Engines, Beihang University,Collaborative Innovation Center of Advan
• 出 处: Chinese Journal of Aeronautics
• 发表日期: 2016年05期
• 关键词: Aircraft Blended wing body Boundary layer ingestion Distributed propulsion sys-t

A streamwise-body-force-model(SBFM) is developed and applied in the overall flow simulation for the distributed propulsion system, combining internal and external flow fields. In view of axial stage effects, fan or compressor effects could be simplified as body forces along the streamline. These body forces which are functions of local parameters could be added as source terms in Navier-Stokes equations to replace solid boundary conditions of blades and hubs. The validation of SBFM with uniform inlet and distortion inlet of compressors shows that pressure performance characteristics agree well with experimental data. A three-dimensional simulation of the integration configuration, via a blended wing body aircraft with a distributed propulsion system using the SBFM, has been completed. Lift coefficient and drag coefficient agree well with wind tunnel test results. Results show that to reach the goal of rapid integrated simulation combining internal and external flow fields, the computational fluid dynamics method based on SBFM is reasonable.

A streamwise-body-force-model (SBFM) is developed and applied in the overall flow simulation for the distributed propulsion system, combining internal and external flow fields. In view of axial stage effects, fan or compressor effects could be simplified as body forces along the streamline. These body forces which are functions of local parameters could be added as source terms in Navier-Stokes equations to replace solid boundary conditions of blades and hubs. The validation of SBFM with uniform inlet and distortion inlet of compressors shows that pressure performance A three-dimensional simulation of the integration configuration, via a blended wing body aircraft with a distributed propulsion system using the SBFM, has been completed. Lift coefficient and drag coefficient agree well with wind tunnel test results. show that to reach the goal of rapid integrated simulation combining internal and external flow fields, the computat ional fluid dynamics method based on SBFM is reasonable.