液态金属磁流体发电通道特性分析

Characteristic analysis of liquid metal magnetohydrodynamic power generation channel

为了研究影响液态金属磁流体发电通道发电性能的因素,文章对5个不同负载系数下的发电通道的流场、电场等进行了三维数值模拟分析。利用仿真分析得到的数据来研究发电通道参数对感应电动势的影响,以及发电通道在不同负载系数下的输出电压和输出功率等的变化规律。在此基础上对发电通道的设计进行优化,以提高液态金属磁流体发电机的发电效率。研究结果表明:当负载系数为0.5~0.7时,发电通道的输出功率和发电效率取得最大值;随着入口速度、磁感应强度和通道宽度的增大,发电通道的感应电动势均有增大的趋势,但增大的趋势逐渐减小;优化后的通道参数为入口速度为7 m/s,磁感应强度为0.8 T,通道宽度为0.9 m。

In order to study the factors affecting the power generation performance of the liquid metal magnetohydrodynamic(MHD)power generation channel,the flow field and electric field of the power generation channel under five different load coefficients were simulated and analyzed.The influence of generation channel parameters on induced electromotive force and the variation of output voltage and output power of generation channel under different load coefficients are studied.The design of the generation channel is optimized to improve the generation efficiency of the MHD generator.The results show that when the load factor is between 0.5〜0.7,the output power and generation efficiency reach the maximum value.With the increase of inlet velocity,magnetic induction intensity and channel width,the induced electromotive force has an increasing trend,but the increasing trend gradually decreases.The optimized channel parameters are as follows:The inlet velocity is 7m/s,the magnetic induction intensity is 0.8T,and the channel width is 0.9m.