【摘要】 针对液环泵工作过程中复杂的流热耦合问题，采用数值模拟与实验测试相结合的方法研究液环泵内流热特性.搭建液环泵热力学特性测试实验台，采用热电偶测温系统分别对泵腔内液环温度和排气排水口温度进行监测，分析泵启动过程的热平衡特性，研究不同冷却水量和流量的热力学特性，并且结合实验结果对液环泵内非定常流热耦合数值进行模拟.结果表明：在泵启动后300秒左右系统达到热平衡状态，泵出口气温和水温趋于稳定；随着冷却水量增大，泵腔内各监测点温度逐渐下降；随着液环泵吸气流量增大，出口气温和水温均逐渐下降，而液环温度先下降后上升；随着吸气流量增大，热损耗功率先减小后增大，与液环温度变化趋势一致；液环泵内压缩功与温度场的分布规律基本一致.更多还原

【Abstract】 Aiming at the complex fluid thermal coupling problem in the working process of the liquid ring pump, the flow and heat transfer characteristics of the liquid ring pump were studied by combining numerical simulation and experimental tests. The experimental tests of thermodynamic characteristics for the liquid ring pump were built, and the temperature of the liquid ring and the outlet were monitored using a thermocouple temperature measuring system. The heat balance behaviors during pump startup were analyzed, and the thermodynamic characteristics under varying cooling water flow rates and operating conditions were studied. Based on the experimental result, the transient simulation for the couple of flow and thermal was carried out. The analysis results show that the system reaches thermal equilibrium about 300 seconds after the pump starts, with outlet gas and water temperatures stabilizing. With the increase of cooling water flow rate, the temperature of each monitoring point in the pump chamber gradually decreases. With the increase of suction flow rate, both outlet air temperature and water temperature of the pump decrease gradually, while the temperature of the liquid ring decreases first and then increases. With the increase of suction flow rate, the heat loss power also decreases first and then increases, which is consistent with the trend of liquid ring temperature. The distribution of compression power in a liquid ring pump is basically consistent with that of the temperature field in a liquid pump.更多还原