【摘要】 为研究灯泡贯流式水轮发电机定子的温度变化和通风系统的流体流动规律,以保持水轮发电机内部良好的散热效果,在建立型号为SFWG24-88/7820灯泡贯流式水轮发电机定子和通风系统的三维模型基础上,采用热电耦合原理,根据定子的特点,做相应的假设,建立计算定子温度场的三维计算域,对定子的温度场进行直接耦合仿真计算,然后应用计算流体力学技术模拟了灯泡贯流式水轮发电机通风沟的流场,并和实际运行中真机实验所测得定子温度的数据进行了对比,最终验证运用耦合场分析方法的正确性。研究表明在合理的简化条件下,采用数值模拟能准确的模拟灯泡贯流式水轮发电机定子的温度变化规律以及通风系统流场及散热情况,对于灯泡贯流式水轮发电机通风系统与定子之间因多场耦合产生的热效应所引起的结构设计和优化具有重要的参考价值。更多还原

【Abstract】 In order to study the fluid flow pattern of light bulb tubular turbine stator temperature and ventilation system to keep the turbine generator internal cooling effect in the establishment of a SFWG24-88/7820 bulb tubular type water wheel three-dimensional model of the generator stator and the ventilation system on the basis of the principle of thermoelectric coupling, according to the characteristics of the stator, the corresponding assumptions are given, and three-dimensional computational domain of calculating the stator temperature field is established, and computational fluid dynamics technology is applied to simulate flow field of the light bulb tubular Hydro-generating machine ventilation groove. The temperature field of the stator direct coupling of simulation and the actual operation of the central plains machine experiment measured stator temperature data were compared, and final verification of the correctness of the use of coupled field analysis method was given. Studies show that in the simplified conditions, the use of numerical simulation accuratly simulates bulb tubular turbine generator stator temperature variation as well as the ventilation system fluid flow and heat dissipation for the light bulb tubular turbine ventilation system; the structural design and optimization caused by the thermal effects due to the multi-field coupling between the stator has an important reference value.更多还原