Numerical Investigation of Electrohydrodynamic (EHD) Flow Control in an S-shaped Duct

An electrohydrodynamic(EHD) method, which is based onglow discharge plasma, is presented forflow control in an S-shaped duct.The research subject is an expanding channelwith a constant width anda rectangular cross section.An equivalentdivergence angle and basic function are introduced to build the three-dimensional model. Subsequently, the plasma physical models are simplified as the effects of electricalbody force and work (done by the force) on the fluid near the wall. With the aid of FLUENT software, the source terms of momentum and energy are added tothe Navier-Stokes equation. Finally,the original performance of three models (A, B and C) is studied, in which model A demonstratesbetter performance. Then EHD control basedon model A is discussed.The results show that the EHD method is an effective way of reducing flow loss and improvinguniformity at the duct exit. The innovation in this study is the assessment of the EHD control effect on the flow in anS-shaped duct. Both the parametricmodeling of the S-shaped duct and the simplified models of plasma provide valuableinformation for futureresearch on aircraft inlet ducts.