基于壅塞理论的CNG加气管流量计算分析  

The Calculation &Analysis of Mass Flow of the Hose in CNG Refueling System Based on the Chocked Flow

作　　者：王磊[1] 田贯三[1] 丁国玉[2] 张明光[1] 

机构地区：[1]山东建筑大学热能工程学院,山东济南250101 [2]北京市城市规划设计研究院,北京100045

出　　处：《管道技术与设备》2011年第1期9-11,34,共4页Pipeline Technique and Equipment

基　　金：国家科技支撑计划项目(2006BAJ03B02)

摘　　要：为了计算CNG加气系统的高压胶管的流量,以气体动力学为基础,建立等截面一维定常绝热摩擦流动的数学模型。利用VC++语言编制界面计算程序对模型进行编程求解,对壅塞状态和非壅塞状态下流量以及出口压力进行计算和拟合。当天然气汽车储瓶内的压力小于临界压力时,加气流量最大,且与胶管两端的压差无关,并计算出最大流量与胶管管长的关系;当车内压力大于等于临界压力时,出口燃气处于非壅塞区,加气流量将减小。通过对60 m处加气管燃气参数的计算分析,拟合出了在非壅塞状态下胶管出口压力与胶管流量的关系式,区别于由两端压差决定的流量计算公式。In order to calculate the mass flow of CNG refueling system,a mathematical model of one-dimensional unsteady adiabatic friction flow has been established and based on gas dynamics.Visual C＋＋ programming language is used to solve the model,as a result,the region of choked flow and unchoked flow is established.When the packet pressure is less than the critical pressure,the chocked mass flow is obtained.An analysis for the gas in the 60-meter-long cross section is taken to fit the relationship between the outlet pressure and the mass flow for hose,which can guide the gas flow measurement and the design operating of the gas-filling system.

关 键 词：壅塞 CNG加气站 高压胶管 马赫数 

分 类 号：TE832[石油与天然气工程—油气储运工程]