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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.
In order to study the MHD control of low temperature micro-ionization plasma jet and to realize the feasibility of thrust vector, a test method based on the MHD plasma flow control theory is proposed, and the seed (alkali metal salt) induced gas ionization MHD flow control test bed was used to study the jet deflection angle under different temperatures and different magnetic field directions. The MHD model was loaded with a user-defined function (UDF) to solve the three-dimensional Navier-Stokes equations, and the feasibility of numerical study on MHD control was explored. : The injection of low ionization seeds into the combustion chamber can induce the gas ionization and form the magnetic fluid, and the thrust vector control can be achieved under the action of magnetic field. The simulation results of the plasma jet deflection are consistent with the experimental results to a certain extent, indicating that the numerical simulation of MHD Flow control has a certain degree of credibility.