【摘要】 本文对负载情况下液态金属磁流体(Liquid Metal Magnetohydrodynamic,LMMHD)发电机发电通道内的电磁、流场进行了三维数值模拟;在此基础上,计算出不同流速和负载系数下LMMHD发电机的输出电流、输出电压、输出功率以及发电机效率并和实验结果进行对比,进而研究了液态金属磁流体发电机的输出特性。研究结果表明:样机的计算结果和实验结果较为一致;当负载系数为0.66、通道内流速为1.8m/s时,获得34.5%的最大发电机效率;当负载系数为0.44、通道内流速为3.6m/s时,获得209.4W的最大输出功率。另外,本文研究了通道内绝缘板的作用,研究结果表明,绝缘板能有效地减少端电流,同时也能改变输出效率的峰值和最大的输出功率更多还原

【Abstract】 The electromagnetic and flow fields of a liquid-metal magnetohydrodynmaic(LMMHD) generator with different load parameters are calculated by means of three-dimensional numerical simulation.Based on the 3D simulations,performance characteristics of a LMMHD generator,such as the output electric current,output electric voltage,output electric power and efficiency with velocities of the channel and load parameters are calculated.By Comparison with the experimental results,they have similar trends.The maximum efficiency of 34.5% is obtained with a load parameter of 0.66 and inlet velocity of 1.8m/s and maximum output electric power of 209.4 Wt are got with a load parameter of 0.44 and inlet velocity of 3.6m/s.In addition,the influence of insulation panel is investigated.It shows that end current decreases afterwards,at the same time peak efficiency and max power output change as well.更多还原