Space-based laser-driven MHD generator: Feasibility study
Space-based laser-driven MHD generator: Feasibility study
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天基激光驱动 MHD 发生器：可行性研究
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
S. H. Choi
中科院分区：
文献类型：
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作者：
S. H. Choi
研究了激光驱动MHD发生器作为天基激光功率传输系统候选接收机的可行性。在文献中获得合理参数的基础上，建立了激光驱动MHD发生器的模型，并假设其为稳定、湍流的二维流动。这些假设是基于连续波激光束照射产生连续稳定的等离子体，从而产生稳定的背压，使介质稳定流动。这里考虑的模型在发生器的二维几何结构中考虑了等离子体的湍流性质。在这些条件下，等离子体参数定义了等离子体流动的导热系数、粘度、电导率，计算出发生器效率为53.3%。如果考虑湍流效应和非平衡电离，效率为43.2%。研究表明，与其他能量转换循环相比，激光驱动MHD系统具有高能量转换效率、高能量密度和相对简单的机制，具有作为空间激光功率接收器的潜力。
The feasibility of a laser-driven MHD generator, as a candidate receiver for a space-based laser power transmission system, was investigated. On the basis of reasonable parameters obtained in the literature, a model of the laser-driven MHD generator was developed with the assumptions of a steady, turbulent, two-dimensional flow. These assumptions were based on the continuous and steady generation of plasmas by the exposure of the continuous wave laser beam thus inducing a steady back pressure that enables the medium to flow steadily. The model considered here took the turbulent nature of plasmas into account in the two-dimensional geometry of the generator. For these conditions with the plasma parameters defining the thermal conductivity, viscosity, electrical conductivity for the plasma flow, a generator efficiency of 53.3% was calculated. If turbulent effects and nonequilibrium ionization are taken into account, the efficiency is 43.2%. The study shows that the laser-driven MHD system has potential as a laser power receiver for space applications because of its high energy conversion efficiency, high energy density and relatively simple mechanism as compared to other energy conversion cycles.