【摘要】 为研究喷雾油束碰撞高温壁面发生膜态沸腾时,油滴的形态变化及与热壁面之间的换热,改进了油滴碰撞高温壁面的碰撞模型,碰壁换热模型源于相关实验的经验模型。Kiva-3V程序结合此碰撞模型和换热模型,对喷雾油束垂直碰撞高温壁面进行数值计算,计算结果表明,此碰撞模型和换热模型能够预测出油滴碰壁发生膜态沸腾时,油滴运动轨迹的变化及油滴与热壁面之间的换热。为检验数值模型的合理性,针对文献中的实验条件进行了相应的数值计算,计算结果与实验结果吻合得很好。更多还原

【Abstract】 To study the change in configuration of oil droplets and their heat exchange with high-temperature wall surfaces when film boiling occurs as a result of spray-mist oil beam impinging on the high-temperature wall surfaces, the authors have improved an impingement model featuring oil droplet impingement on hot wall surfaces. The wall-impingement heat exchange model has been derived from an empirical model of relevant experiments. After Kiva-3V program has been combined with this wall-impingement and heat exchange model, a numerical calculation was conducted of the spray-mist oil beam perpendicularly impinging on the high-temperature wall surfaces. The calculation results show that the above model could successfully simulate the impingement process between the oil mist and the high-temperature wall surfaces. To verify the rationality of a numerical model, a corresponding numerical calculation was performed under the experimental conditions given in relevant literature. The calculation results are in good agreement with the experimental ones.更多还原