超临界压力下吸热型碳氢燃料的对流给热系数测定  

Measurements of coefficient of convective heat transfer for endothermic hydrocarbon fuel up to supercritical pressures.

作　　者：赵祖亮[1] 方文军[1] 郭永胜[1] 林瑞森[1] 

机构地区：[1]浙江大学化学系,浙江杭州310027

出　　处：《浙江大学学报（理学版）》2006年第1期71-75,共5页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(20403015)(;20573096);国家"863"高技术项目;浙江省自然科学基金(Y404329);浙江省教育厅资助项目(20030345)

摘　　要：建立了一套测量液体燃料传热性质的装置和方法,适用压力5 MPa,温度800℃.用电传热法测定了吸热型碳氢燃料在常压至超临界压力下流过内径为1.0 mm不锈钢管的传热数据.结果表明:对流给热系数随燃料汽化和裂解程度加深而增大,在燃料开始汽化和开始裂解时数值较低,表现出明显的极值;超临界压力下,极值不明显.除相变段外,压力越高,对流给热系数越大.Apparatus and method for the determination of heat transfer characteristics of liquid fuel at supercritical condition were set up in this laboratory, which can be used up to the pressure of 5 MPa and to the temperature of 800 ℃. Heat transfer data of an endothermic hydrocarbon fuel flowing inside a stainless steel tube with an internal diameter of 1.0 mm at the pressure range from atmosphere to supercritical condition were obtained by the electrical heat transfer method. The test showed that the value of coefficient of convective heat transfer increases with increasing degree of evaporation and cracking of the fuel. There exist maximum and minimum values because of the vaporization and cracking of the fuel. Under the supercritical pressure, the maximum or minimum values could not be observed obviously. Except for the region of phase transition, the higher the pressure is, the bigger the value of heat transfer coefficient was.

关 键 词：吸热型碳氢燃料 超临界压力 对流给热系数 电传热 

分 类 号：O642.4[理学—物理化学] TE624.4[理学—化学]