含盐液滴运动传热传质特性及其影响因素  

Characteristics of heat and mass transfer in moving salty droplets and its influencing factors

作　　者：唐宇豪 柴得林 马乙楗 刘宇 易贤[1,2] 桂业伟 TANG Yuhao;CHAI Delin;MA Yijian;LIU Yu;YI Xian;GUI Yewei(Key Laboratory of Icing and Anti/De-icing,China Aerodynamics Research and Development Center,Mianyang 621000,China;State Key Laboratory of Aerodynamics,Mianyang 621000,China)

机构地区：[1]中国空气动力研究与发展中心结冰与防除冰重点实验室,绵阳621000 [2]空天飞行空气动力科学与技术全国重点实验室,绵阳621000

出　　处：《空气动力学学报》2024年第4期55-64,I0001,共11页Acta Aerodynamica Sinica

基　　金：国家科技重大专项(J2019-Ⅲ-0017)。

摘　　要：船舶在极地等气候寒冷恶劣的海上环境航行时,海水飞沫易导致其上层结构结冰,严重时对船舶航行及室外环境作业安全造成威胁。准确预测海水飞沫结冰,对确保极地区域安全作业具有重要意义。海水飞沫结冰和纯水飞溅结冰的主要区别在于盐度对结冰的影响,对于结冰问题,通常将海水飞沫简化为含盐的液态水滴(即含盐液滴,简称液滴)。数值模拟是研究含盐液滴结冰的重要手段,含盐液滴运动-传热传质过程是其结冰数值模拟的关键环节,决定了液滴撞击特性及与结冰相关的撞击液滴的物理量。本文在SHIPICE传热模型的基础上,提出了含盐液滴在运动过程中考虑质量损失及盐度变化的传热传质耦合模型;基于NNW-ICE平台,发展了拉格朗日框架下含盐液滴运动-传热传质耦合数值计算方法并开发了相应计算程序,实现了含盐液滴运动-传热传质过程的模拟;探究了含盐液滴运动-传热传质过程中的关键影响因素,系统分析了不同来流速度、温度、相对湿度和液滴粒径条件下的传热传质效应,为进一步发展含盐液滴结冰数值计算方法奠定了基础。When ships sail in cold and harsh maritime environments such as the polar regions,sea spray can easily cause their superstructure to be frozen.Severe ice accumulation can pose a threat to the safety of ship navigation and outdoor environment operations.Accurate prediction of ice accretion due to sea spray is important to ensure safe operations in polar regions.The main difference between sea spray icing and splashing pure water freezing is the effect of salinity,thus sea spray is often simplified as salty liquid water droplets.Numerical simulation is an important means to study the icing of salty liquid water.The movement and heat/mass transfer process of salty liquid water are key factors in the numerical simulation of salty droplet icing,which determine the impingement characteristics of salty droplets and the physical quantity of impacting droplet related to icing.Based on the heat transfer model SHIPICE,we have proposed a coupled model of heat and mass transfer that considers both the loss of mass and the change in salinity during the movement of salty droplets.On the NNWICE platform,we have developed a coupled numerical calculation method and the corresponding program for salty droplet movement and heat/mass transfer process in the Lagrange framework,which realizes the simulation of heat and mass transfer process of moving salty droplets.Key influencing factors in the salty droplet movement and heat/mass transfer process are explored,and the heat and mass transfer effects under different conditions of incoming flow velocity,temperature,relative humidity and salty droplet diameter conditions,are systematically analyzed,laying the foundation for further development of numerical calculation methods for salty droplet icing.

关 键 词：海水飞沫 传热传质 盐度变化 结冰计算 数值模拟 

分 类 号：TB131[理学—物理]