摘要
常温成品油管道会影响同沟敷设的加热原油管道的土壤温度场。应用保角变换方法,推导了同沟敷设管道稳态土壤温度场的解析计算公式。以国内某同沟敷设管道为例,分别采用解析公式和数值模拟方法计算稳态土壤温度场,结果表明:在与管道水平距离小于2.5m的范围内,数值模拟结果大于解析公式计算结果;在与管道水平距离大于2.5m的范围内,数值模拟结果小于解析公式计算结果;两者的相对误差最大为5%,因此验证了解析公式的正确性。误差产生原因:一是两种方法的计算区域不同,解析法认为管道截面水平方向无穷远处的土壤自然温度场不受管道影响,而数值模拟法认为管道截面水平方向的计算区域存在边界;二是在公式推导过程中,为简化计算,对一些参数取平均值。
For the pipelines served as crude oil and refi ned oil product laid in one ditch, soil temperature fi eld of hot crude oil pipeline is influenced by the cool refi ned oil product pipeline. Analytic formula of steady-state soil temperature field is deduced by conformal mapping. As an illustration, the static temperature fi eld of the pipelines laid in one ditch in China is respectively calculated by analytic formula and numerical simulation. The result obtained by the numerical simulation is higher than the result calculated by the analytic formula within 2.5 meters of the pipe. Outside of that range, the result computed by the analytic formula is higher than the result obtained by numerical simulation. The relative error by using these two methods is less than 5%. So the analytic formula is validated. The error is caused by the two reasons as follows:in the analytic method, the fi rst reason is that the computed domain for different methods is different, the natural soil temperature is regarded as not influenced by the heated pipeline, i.e., the computed domain is not bounded; While in the numerical simulation, the computed domain is bounded. The second reason is that some parameters are simplify chosen as their mean value during the formula derivation process.
出处
《油气储运》
CAS
2012年第2期103-105,108,共4页
Oil & Gas Storage and Transportation
基金
辽宁省教育厅科技项目"并行埋地管道间热力
水力相互影响规律研究"
2008S137
关键词
同沟敷设
温度场
保角变换
解析公式
数值模拟
pipelines laid in one ditch, temperature f ield, conformal mapping, analytic formula, numerical simulation
