Research of the leading edge separation vortex characteristics due to the inlet velocity shape

3rd International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Chen, Xiao-Ming^1 ; Feng, Xiao-Qing^1 ; Hu, Xiao-Chun^1

China Huadian Engineering Co. LTD, Beijing

100160, China^1

关键词: Adverse pressure gradient;    Boundary layer thickness;    Calculation results;    Inlet boundary layer;    Inverse proportions;    Inverse relationship;    Separation vortex;    Vortex generators;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/61/1/012032/pdf
DOI  :  10.1088/1755-1315/61/1/012032

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The zero adverse pressure gradient plate is taken as the study object, in order to study the leading edge separation vortex characteristics due to the inlet velocity shape. With the CFD method, we classify the study cases into 6 groups (h/δ = 0.1,0.2,0.5,1.0,1.5,2.0(h for vortex generator(VG) height, δ of inlet boundary layer thickness)) to study the inflow boundary layer's influence law to the vortex generator characteristics. Calculation results show that, vortex generator leading separation vortex strength is proportional to fluid average kinetic energy within vortex generator height range. Vortex strength shows essentially inverse relationship with the flow boundary layer thickness, while the vortex generator shape resistance also shows the inverse proportion to the flow boundary layer thickness. Namely, heavier flaw boundary layer thickness leads to lower vortex strength and lower vortex generator shape resistance simultaneously.