摘要
对微重力下内嵌矩形或三角形翅片的蓄热腔体中正十八烷融化过程的相界面演化、流场和温度分布特征等进行了数值研究,并与常重力下的数值模拟结果进行对比,分析翅片形状和重力对融化传热的影响;通过常重力下数值模拟与实验测试结果的对比验证了数值方法的准确性。结果表明:微重力下内嵌翅片的蓄热腔体中导热和热毛细对流共同影响融化传热过程;翅片的存在显著提升了融化速率,内嵌矩形和三角形翅片情况下融化时间分别比无翅片情况减少51.3%和44.9%;微重力和常重力下矩形翅片的传热性能优于三角形翅片。
An idea of embedding fins in the thermal energy storage cavity to enhance melting heat transfer is proposed.The evolution of solid-liquid interface and streamline profile as well as temperature distribution during melting of n-octadecane in cavity with rectangular or triangular fins under microgravity are numerically investigated,and compared with those under normal gravity,to analyze the effects of fin shape and gravity on melting heat transfer.The accuracy of numerical method is verified by the comparison between numerical predictions and experimental results under normal gravity.The results show that the melting heat transfer process is affected by heat conduction and thermocapillary convection under microgravity.The presence of fins significantly increases the melting rate,and the total melting time in cavities with rectangular and triangular fins are 51.3% and 44.9% less than that in cavity without fins.The enhancement effects of rectangular fins on melting heat transfer under microgravity and normal gravity are better than those of triangular fins.
作者
甘玉娟
彭浩
王一峰
GAN Yu-juan;PENG Hao;WANG Yi-feng(Engineering Research Center of Shipping Simulation(Ministry of Education),Shanghai Mtirilime University,Shanghai,China,Post Code:201306)
出处
《热能动力工程》
CAS
CSCD
北大核心
2020年第12期108-114,共7页
Journal of Engineering for Thermal Energy and Power
基金
上海市自然科学基金(19ZR1422300)。
关键词
微重力
融化传热
相变材料
热毛细对流
翅片
microgravity
melting heat transfer
phase change material
thermocapillary convection
fin
作者简介
甘玉娟(1995-),女,安徽宣城人,上海海事大学硕士研究生;通讯作者:彭浩(1982-),男,安徽颍上人,上海海事大学副教授,E-mail:hpeng@shmtu.edu.cn.
