A Novel EHD-Jet System to Achieve High Performance in Terms of Energy Consumption and Heat Transfer
Please login to view abstract download link
In electrohydrodynamic (EHD) jet systems, air undergoes ionization through electric discharge at high voltage (in the kV range), inducing flows such as the corona wind. Despite the elevated applied voltage, the associated current intensity remains low, typically ranging from μA to mA, resulting in almost negligible power consumption. This characteristic renders the corona wind exceptionally energy-efficient [1,2]. In this paper, a numerical investigation was conducted to analyze the impact of the ground collector's shape on gas velocity and, consequently, heat transfer along a heated wall in a wire-plate EHD-jet system. The numerical simulations revealed that the flow characteristics and heat transfer performance of EHD-induced gas flow in a wire-plate electrode system were contingent on the shape of the grounded electrode. Specifically, the numerical results demonstrated that gas velocity in scenarios with a curved grounded electrode exceeded that in cases with flat grounded electrodes, highlighting favorable attributes in terms of cooling and energy consumption. Additionally, gas velocity exhibited an upward trend with increasing applied voltage, underscoring the intricate relationship between electric fields and fluid dynamics in the context of electrohydrodynamics.
