Numerical investigation of heat transfer characteristics for Subsea Xmas tree assembly
Numerical investigation of heat transfer characteristics for Subsea Xmas tree assembly
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DOI：
10.1007/s12206-015-1041-x
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发表时间：
2015-12
影响因子：
1.6
通讯作者：
Biao Hu;Hongwu Zhu;K. Ding;Fangling Xu;Youjiang Zhang
中科院分区：
文献类型：
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作者：
Biao Hu;Hongwu Zhu;K. Ding;Fangling Xu;Youjiang Zhang
本研究的重点是在高空间分辨率下，研究海底水平井采油树组件的传热特性。采用计算流体力学（稳态Reynolds-平均Navier-Stokes）结合低雷诺数模型（LRNM）进行换热分析，并在全尺寸水下闸阀换热实验中进行了验证，结果吻合较好。得到了冷海水流经海底采油树的特性，以及海底采油树与周围冷水之间的对流换热特性。典型的“热点”具有高对流传热系数（CHTC）并产生大量的热损失，这是数值确定的。在设计水深下，研究了安装方位、海水流速、内油温度对对流换热的影响。这些工作对海底采油树的热设计具有重要意义，可以提高结构可靠性和流动保障水平。
This study focuses on the heat transfer characteristic of a horizontal subsea Xmas tree assembly at a high spatial resolution. Computational fluid dynamics (steady Reynolds-averaged Navier-Stokes) in combination with Low Reynolds number modelling (LRNM) is adopted for heat transfer analysis, which has been validated against a full scale underwater gate valve heat transfer experiment with good agreements. The characteristics of cold sea water flowing through the subsea tree, and of convection heat transfer between the subsea tree and ambient cold water are obtained. The typical “hot spots,” which have high Convection heat transfer coefficient (CHTC) and create great large amounts of heat loss, are numerically determined. Under the designed water depth, the effects of installation orientation, sea water velocity, and inner oil temperature on convection heat transfer are investigated as well. Such work is significant for thermal design of the subsea tree to increase structural reliability and flow assurance level.