格拉管线浅层冻土温度变化对0号柴油输送温降的影响

摘要

Based on thehydro⁃thermal coupling model of frozen earth temperature and the meteorological data of the Feng⁃huoshan area, the temperature changes caused by the atmosphere are simulated using ANSYS. Thus the temperatures of the operat⁃ing environment are given. Results show that, the simulations coincide with the measured values approximately, and the temperature changes more gently through a year as it becomes deeper. Then the drops of the temperature during 0# diesel transportation in mid⁃dle July is simulated with Fluent, and the results show that the temperature of the 0# gasoline drops from 11℃to 5.5℃during its transportation in 48 m pipeline. And the values accord well with which calculated through the formula. The temperature rises caused by viscous heating of 0# diesel is also simulated with a boundary of 0℃. The results show that the temperature rises 0.000 8℃dur⁃ing its transportation in a 48 m pipeline.%以水热耦合模型为基础，依据风火山地区的气象资料，用ANSYS软件模拟一年中大气温度变化对浅层冻土的影响，确定格拉管线运行的自然地温环境。结果表明模拟值与实测数据基本吻合，且温度月变化随深度增加而渐趋平缓。继而以7月中旬的自然地温为边界条件，运用Fluent软件模拟0号柴油输送过程中的温降变化。结果表明：温度为11℃的0号汽油流经48 m长的管路，最大温降约为5.5℃，且沿程温降模拟值与轴向温降计算式的计算结果基本相符；以0℃为边界温度，模拟了入口温度为0℃柴油的黏性增温效应，结果显示，流经48 m长的管路，油流的黏性温升约为0.0008℃。