Detailed formulation of the detached-eddy simulation （DES） based on shear stress transport model （SST） was deduced. Based on finite volume method, detached-eddy simulation of super- sonic turbulent flow over rearw...Detailed formulation of the detached-eddy simulation （DES） based on shear stress transport model （SST） was deduced. Based on finite volume method, detached-eddy simulation of super- sonic turbulent flow over rearward facing step was conducted. Multi-block structured non-conform grid was designed. The obtained distribution of wall pressure coefficient along the downstream of the step was in good agreement with experiment. The structure of supersonic flow over rearward facing step is complicated and contains boundary layer-shock interaction, shock-shock interaction and sec- ondary flow separation. The predictions of the corner pressure and location of the reattachment shock are more exact than the Reynolds-averaged method. Results show that detached-eddy simulation can simulate the supersonic separated flows exactly and has advantages over Reynolds-averaged method. The partition of the detached-eddy simulation can be easily achieved by using multi-block non-conform grid, which reduces the requirement of the computational resources as well.展开更多
Results of numerical calcultions for viscous incompressible laminar flow over a rearwardfacing step on circular cylinder are presented. The domainsubdividing and matching method and the simplify SOLA solution are enga...Results of numerical calcultions for viscous incompressible laminar flow over a rearwardfacing step on circular cylinder are presented. The domainsubdividing and matching method and the simplify SOLA solution are engaged in the simulation. The effects of the step’s height,installed position and the Reynolds number on the flow field are obtained and discussed.展开更多
文摘Detailed formulation of the detached-eddy simulation （DES） based on shear stress transport model （SST） was deduced. Based on finite volume method, detached-eddy simulation of super- sonic turbulent flow over rearward facing step was conducted. Multi-block structured non-conform grid was designed. The obtained distribution of wall pressure coefficient along the downstream of the step was in good agreement with experiment. The structure of supersonic flow over rearward facing step is complicated and contains boundary layer-shock interaction, shock-shock interaction and sec- ondary flow separation. The predictions of the corner pressure and location of the reattachment shock are more exact than the Reynolds-averaged method. Results show that detached-eddy simulation can simulate the supersonic separated flows exactly and has advantages over Reynolds-averaged method. The partition of the detached-eddy simulation can be easily achieved by using multi-block non-conform grid, which reduces the requirement of the computational resources as well.
文摘Results of numerical calcultions for viscous incompressible laminar flow over a rearwardfacing step on circular cylinder are presented. The domainsubdividing and matching method and the simplify SOLA solution are engaged in the simulation. The effects of the step’s height,installed position and the Reynolds number on the flow field are obtained and discussed.
