MHD控制微电离等离子体射流

为了研究磁流体动力学(MHD)控制低温微电离等离子体射流,实现推力矢量的可行性,提出了一种基于MHD控制等离子体流动理论的试验方法,建立了种子(碱金属盐)诱导燃气电离的MHD流动控制试验台,研究了不同温度和不同磁场方向条件下射流偏转向量角,并用用户自定义函数(UDF)加载MHD模型求解三维N-S方程,探究了数值研究MHD控制的可行性.结果表明:向燃烧室内注入低电离能种子能够诱导燃气电离,形成磁流体,在磁场作用下实现推力矢量控制;等离子体射流偏转的数值模拟结果与试验结果在一定程度上是一致的,说明数值模拟MHD流动控制具有一定的可信度.

MHD control of weakly ionized plasma jet flows

In order to study the feasibility of the thrust vectoring using magnetohydrodynamic(MHD) control weakly ionized plasmas at low temperature, the experimental method based on the MHD control plasma flow theory was put forward. We established a MHD flow control experiment platform of seeds (alkali metal salts) induced gas ionization to research jet deflection vector angle under the condition of different temperature and different magnetic direction, and explored the feasibility of the numerical study MHD control by user defined function (UDF)loading the MHD model to solve the three-dimensional Navier-Stokes equations. It is demonstrated that injecting low ionization energy seed into the combustor can induce gas ionization, forming magnetic liquid and achieving thrust vector control under magnetic field; the numerical simulation results and experimental results of plasma flow deflection are consistent, meaning numerical simulation MHD flow control has a certain credibility.