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为了更好地揭示洗涤冷却室内气体穿越液池时的气液两相的传热和传质特性,尤其是压力对气泡特性的影响这一至今尚未解决的关键问题,文中运用流体体积(VOF)模型进行了动态数值模拟,详细探讨了在不同压力条件下洗涤室液池内气含率和湿周沿径向的变化。建立了从数值模拟结果中提取湿周和气含率信息的方法,研究结果表明:总湿周随压力的升高而显著加长;下降管管壁附近的平均气含率很高但是平均湿周却很小;随着压力的升高,径向各段气含率和湿周明显升高。通过数值模拟得到了洗涤过程中湿周随压力的变化规律。
In order to better reveal the heat transfer and mass transfer characteristics of gas-liquid two phases during the washing and cooling of the indoor gas passing through the liquid pool, especially the key problems that have not been solved yet, such as the influence of pressure on bubble characteristics, The dynamic numerical simulation of the model was carried out. The gas holdup and radial variation along the wet zone of the scrubbing chamber under different pressures were discussed in detail. The method of extracting information of moisture content and gas content from numerical simulation results was established. The results show that the total wetting period increases significantly with the increase of pressure, and the average gas holdup around the descending pipe wall is very high. However, Small; with the pressure increases, radial gas holdup and wet weeks significantly increased. Through the numerical simulation, the changing law of the wetting period with pressure during the washing process was obtained.