摘要
采用有限体积法对周期性地表温度边界条件下埋地管道传热规律进行了数值模拟,对比分析了有、无保温层对埋地管道传热规律的影响;分析了保温层导热系数、土壤导热系数、土壤比热容及地表温度波动参数等因素对土壤平均温度及管壁平均热流密度变化的影响。研究表明,保温层、土壤的导热系数及比热容的增加均有利于埋地管道的保温,此外,比热容对时均传热状况无影响;地表温度波振幅及频率的变化对管壁平均热流密度的振幅具有一定的影响,但不影响管壁时均热流密度。
Numerical simulation on heat transfer law for buried pipeline at cyclical ground temperature boundary condition is made with finite volumetric method,influence of insulating layer or free of insulating layer on heat transfer law of buried pipeline is compared and analyzed and influences of soil mean temperature and variation of pipe wall mean heat flow density on thermal conductivity factor of insulating layer,thermal conductivity factor of soil,specific heat capacity of soil and ground temperature wave parameters are analyzed.Study results indicate that the parameters'increase in insulating layer,thermal conductivity(actor of soil and specific heat capacity is beneficial to insulation of buried pipeline,and moreover,the specific heat capacity has not influence on time-mean heat transfer condition;the variation of ground temperature wave amplitude and frequency has a certain influence on the amplitude of mean heat flow density of pipe wall,however has not influence on time-mean heat flow density of pipe wall.
出处
《油气储运》
CAS
北大核心
2009年第10期26-29,共4页
Oil & Gas Storage and Transportation
基金
西安石油大学科技基金项目(Z07013)
关键词
埋地管道
周期性边界条件
传热规律
数值模拟
huried pipeline.cyclical boundary condition.heat transfer law.numerical simulation
