蒸发表面温度的数值模拟研究

摘要

Based on the one-dimensional heat conduction differential equations to establish a thermal equilibrium equations contain the evaporation process, and adopted the use of outside surface of total heat transfer coefficient simplified model and the latent heat of evaporation model of two different methods for numerical simulation of the temperature of the evaporation surface. The simulation results compared with Thermal climatic wind tunnel laboratory analysis found: two models are wel consistent with the test result, no delays. The simulation results with measured values when using a simplified model of the outer surface of the overall heat transfer coefficient is very close, the maximum relative error is 3.4%. While the use of the latent heat in vaporization models vary greatly, the maximum relative error is 18.1%.%本文在一维导热微分方程的基础上建立了包含蒸发过程的热平衡方程组，并采用了使用外表面总换热系数的简化模型与蒸发潜热模型两种不同的方法对蒸发表面温度进行数值模拟。将模拟结果与热湿气候风洞实验室所得实测值进行对比分析发现：两种模型均能很好的与实测结果趋势一致，没有延迟现象。当采用外表面总换热系数的简化模型时模拟结果与实测值很接近，最大相对误差为3.4%。而采用蒸发潜热模型则差别较大，最大相对误差达到18.1%。