Magnetohydrodynamic Control of Hypersonic Flows and Scramjet Inlets Using Electron Beam Ionization
Magnetohydrodynamic Control of Hypersonic Flows and Scramjet Inlets Using Electron Beam Ionization
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DOI：
10.2514/2.1616
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发表时间：
2002
期刊：
影响因子：
2.5
通讯作者：
S. Macheret;M. Shneider;R. Miles
中科院分区：
文献类型：
--
作者：
S. Macheret;M. Shneider;R. Miles
研究了在非设计状态下通过在进气道上游操纵近表面磁流体动力学（MHD）系统来控制超燃冲压发动机进气道的可能性。空气中所需的导电性应该是由电子束从飞行器沿沿着磁场线注入空气中产生的。一个简单的模型的束产生的电离剖面的开发和耦合等离子体动力学，MHD方程，和二维无粘流方程。计算表明，当飞行马赫数高于进气道优化马赫数时，具有合理参数的MHD系统可以将激波带回到前缘。磁流体动力学效应并不只是因为j × B力的功是总效应的一个重要部分而被简化为加热。电离电子束的功率要求可能低于用MHD提取的电功率，使得将在船上产生净功率。与高霍尔场的问题进行了讨论
The possibility of controlling scramjet inlets in off-design conditions by operating a near-surface magnetohydrodynamic (MHD) system upstream of the inlet is examined. The required electrical conductivity in air is supposed to be created by electron beams injected into the air from the vehicle along magnetic field lines. A simple model of a beam-generated ionization profile is developed and coupled with plasma kinetics, MHD equations, and two-dimensional inviscid flow equations. Calculations show that an MHD system with reasonable parameters could bring shocks back to the cowl lip when flying at Mach numbers higher than those for which the inlet was optimized. The MHD effect is not reduced to heating only because the work by j X B forces is a substantial part of the overall effect. Power requirements for ionizing electron beams could be lower than the electrical power extracted with MHD, so that a net power would be generated onboard. Problems associated with high Hall fields are discussed