中文摘要：

使用欧拉-拉格朗日方法研究了功能热流体中单个相变微胶囊颗粒在湍流场中的运动和融化特性，获得了相变颗粒在湍流场中运动轨迹以及温度沿轴线分布情况。结果表明，相变颗粒的粒径、密度以及入口位置对其运动和融化特性有较大影响。颗粒较小时跟随性好，但吸收能量能力较小，相变段较短；颗粒较大时跟随性差，但吸收能量能力较大，相变段增长；靠近圆管中心处颗粒温度较低，相变段较长且靠后，靠近壁面处颗粒温度高，相变段较短且靠前。

英文摘要：

The movement and melting characteristic of a microencapsulated phased-change material （MCPCM） particle in latent functionally thermal fluid were researched using the method of Euler-Lagrange. The movement track and distribution of temperature were obtained. It is shown that the diameter, density and entrance position of phased-change particle has a great effect on the movement and melting characteristics. Small particle has better follow behaviors, but can absorb little energy and the phase-change section is short. Big particle has worse follow behaviors, but can absorb more energy and the phase-change section is long. The temperature of particle close with center of tube is lower and the phase-change section is longer and close to the end. The temperature of particle close with wall is higher and the phase-change section is shorter and close to the entrance.