以水为工作介质,在综合考虑液体可压缩性、液体表面张力、液体黏性、气泡内外热交换及气泡内部存在水蒸气的情况下,采用动力学方法对湍流压力场驱动下水力空化气泡内的温度演变及影响因素进行了研究.分析了液体中空化热效应产生的原因及空化泡平衡半径、孔板水力空化反应器运行与结构参数等对空化泡溃灭温度的影响规律,拟合得到了各影响参数与空化泡溃灭温度之间的显著函数关系式.研究结果可为水力空化反应器的优化设计及水力空化技术的发展和应用提供理论指导与技术支撑.
Considering such factors as liquid compressibility, surface tension, liquid viscosity, heat transfer through bubble wall and water vapor inside bubble, the temperature evolution and its influence factors inside a single cavitation bubble driven by turbulent pressure field are investigated by adopting dynamics method and regarding water as work medium. Detailed analysis is conducted to understand the effects of cavitation bubble equilibrium radius, operating and structural parameters of the orifice hydrodynamic cavitation reaction on the bubble collapse temperature. A comprehensive significant fitting equation is obtained to quickly forecast the bubble collapse temperature under various conditions. The achievements obtained may provide theoretical guidance and technical support for optimization design of hydrodynamic cavitation reactor and practical application of hydrodynamic cavitation technology.