深海管道稳态流动非均匀温度场研究

Non-uniform temperature fields of a deep-sea pipeline in steady flow

为了研究深海管道稳态流动非均匀温度场,利用GAMBIT软件建立了单层管道几何模型并划分网格,利用FLUENT软件对管道在稳态流动时的非均匀温度场进行了数值模拟,对网格独立性进行了分析,确定了合理的网格划分方式,得到了管道沿程温度曲线。通过对比数值模拟与理论公式计算得到的原油温度结果,对FLUENT模型进行了验证,最后进行了管道温度场参数化分析。研究结果表明,稳态流动时管道沿程温度逐渐减小,温度梯度也逐渐减小,原油入口温度、入口流速、保温层厚度及保温层外壁与海水的换热系数均影响管道温度场的分布。研究为管道的非均匀温度效应研究提供参考。

To study the non-uniform temperature field of a deep-sea pipeline in steady flow,this paper established a geometric model of a single-layer pipeline and meshed it with GAMBIT . Numerical simulation of the pipeline in steady flow was then conducted under the condition of a non-uniform temperature using FLUENT software. The mesh independence of the system was analyzed,a reasonable method of mesh division was adopted,and the curve of the temperature along the pipeline was obtained. The FLUENT model was verified by comparing the oil temperature re-sults of the numerical simulation with those of the theoretical formula. Finally,parametric analysis of the tempera-ture field of the pipeline was carried out. Study results showed that both the temperature along the pipeline in steady flow and the temperature gradient decreased gradually. The oil inlet temperature, oil inlet velocity, thermal insula-tion layer thickness,and heat transfer coefficient between the thermal insulator and the seawater influenced the dis-tribution of the pipeline temperature field. This paper provides a reliable reference for the study of non-uniform tem-perature effects on the pipeline.