搅拌釜内气液动态相对稳定状态及雷诺数计算

Dynamic relative steady state of turbulent gas-liquid system in stirred vessel and its application in Reynolds number calculation

设计了一种全新的测量搅拌釜内动态体系温度、压力的设备及方案,以CO2-H2O体系为特征体系,对搅拌状态下气液二相动态相对稳定状态进行了研究。搅拌釜内流体发生湍动,达到相平衡的气液二相的传质极限发生偏移。在不同温度(288.15—307.15 K)和转速(190—520 r/min)下进行实验,温度一定时,动态平衡偏移率随湍动程度的增大而增大。温度为307.15 K、转速为520 r/min时,动态平衡偏移率高达27%。利用动态平衡偏移率反算搅拌釜内的雷诺数ReD,将其与传统计算得出的雷诺数ReT进行比较拟合得到关联式。

A stirred vessel which is capable of measuring dynamic temperature and pressure of the system was designed to study the dynamic relative steady state of turbulent CO2-H2O system. The mass transfer limitation deviates when gas-liquid system of static mass transfer equilibrium begins to flow. The experiments at different temperatures （288.15--307.15 K） and speeds （190--520 r/min） show that strengthening turbulence of fluid can increase the deviation. When temperature is 307.15 K, speed is 520 r/min, the dynamic equilibrium deviation rate r is as high as 27%. Processing data and Re_D can be calculated by the relationship of Re and r. The correlation of ReD and ReT is gained by fitting experimental data.