Vaddi Ravi Sankar, Guan Yifei, Mamishev Alexander, Novosselov Igor
Department of Mechanical Engineering, University of Washington, Seattle, WA, USA.
Department of Mechanical Engineering, Rice University, Houston, TX, USA.
Proc Math Phys Eng Sci. 2020 Sep;476(2241):20200220. doi: 10.1098/rspa.2020.0220. Epub 2020 Sep 30.
Electrohydrodynamic (EHD) thrust is produced when ionized fluid is accelerated in an electric field due to the momentum transfer between the charged species and neutral molecules. We extend the previously reported analytical model that couples space charge, electric field and momentum transfer to derive thrust force in one-dimensional planar coordinates. The electric current density in the model can be expressed in the form of Mott-Gurney law. After the correction for the drag force, the EHD thrust model yields good agreement with the experimental data from several independent studies. The EHD thrust expression derived from the first principles can be used in the design of propulsion systems and can be readily implemented in the numerical simulations.
当电离流体在电场中由于带电粒子与中性分子之间的动量传递而加速时，会产生电流体动力学（EHD）推力。我们扩展了先前报道的解析模型，该模型将空间电荷、电场和动量传递耦合起来，以推导一维平面坐标中的推力。模型中的电流密度可以用莫特-格尼定律的形式表示。在对阻力进行修正后，EHD推力模型与多项独立研究的实验数据吻合良好。从第一原理推导得出的EHD推力表达式可用于推进系统的设计，并可轻松应用于数值模拟。
