复合材料CNG气瓶充气温升的数值模拟  

NUMERICAL SIMULATION OF TEMPERATURE RISE OF CNG CYLINDER FILLED WITH COMPOSITE MATERIAL

作　　者：林玉娟[1] 王志伟 高东 Lin Yujuan;Wang Zhiwei;Gao Dong(College of Mechanical Science and Engineering,Northeast Petroleum University,Daqing,Helongjiang,163318;ZhongKe(Guangdong)Refinery&Petrochemical Company Limited,Zhanjiang,Guangdong,524076)

机构地区：[1]东北石油大学机械科学与工程学院,黑龙江大庆163318 [2]中科(广东)炼化有限公司,广州湛江524076

出　　处：《石油化工设备技术》2021年第5期22-28,I0002,共8页Petrochemical Equipment Technology

摘　　要：为得到复合材料CNG气瓶充气时的温度变化规律,通过Fluent17.0对30 MPa下气瓶的充气过程进行了数值模拟,分析得出充气过程中的内部气体的温度分布及变化规律和壁面温升规律,并对相同条件下外壁面加入导热介质的气瓶进行模拟结果分析。结果表明:气瓶高温区域分布在瓶尾的封头段,低温区分布在进口位置,进口处的温度分布呈现羽流状;气体温度持续上升,但与时间成非线性关系;气瓶的纤维层最高温升的速率有明显的提高,而其平均温升的速率提升幅度较小,但内胆层的温升速率随着充装进行有小幅降低;壁面的温升与充气时间一直不成线性关系;导热胶泥使得气瓶壁面温升保持稳定,且在充气结束时其温度有所降低。In order to obtain the temperature change rules of the composite CNG cylinder during inflation,the inflation process of the cylinder under 30 MPa was numerically simulated by Fluent 17.0.And the temperature distribution and change rules of the internal gas during the inflation process and the wall temperature rise were obtained through analysis.The simulation results were analyzed for the gas cylinder with heat conducting medium added to the outer wall under the same conditions.The results show that the high temperature area of the gas cylinder is distributed in the head section of the bottle tail;the low temperature area is distributed in the inlet position;and the temperature distribution at the inlet presents a plume shape.The gas temperature continues to rise,but it has a nonlinear relationship with time.The highest temperature rise rate of the fiber layer of the gas cylinder has been significantly increased,while the average temperature rise rate of the cylinder has a small increase,but the temperature rise rate of the inner bladder layer slightly decreases as the filling progresses.The temperature rise of the wall has not been linearly related to the inflation time.The thermal conductive paste keeps the temperature rise of the cylinder wall stable,and its temperature is reduced at the end of inflation.

关 键 词：复合材料 CNG气瓶 数值模拟 温升 

分 类 号：U464.13[机械工程—车辆工程] TB33[交通运输工程—载运工具运用工程]