圆柱形混合室截面直径对喷射系数影响的实验研究  

Experimental Study on the Effect of Cross-Section Diameter of Cylindrical Mixing Chamber on Ejection Coefficient

作　　者：何丽娟[1] 王淑旭 吴夏梦 王飒 HE Li-juan;WANG Shu-xu;WU Xia-meng;WANG Sa(College of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou,China,Post Code:014010)

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010

出　　处：《热能动力工程》2020年第1期159-163,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51566014,51106068)。

摘　　要：依据索科洛夫等学者提出喷射器计算的经验公式对喷射器进行优化设计加工,并自行搭建测量喷射器性能实验台。采用N_2、CO2、R2903种自然工质,研究了当扩压室直径为定值,实验压力为高压(10 MPa≤P≤100 MPa)状态时圆柱形混合室截面直径变化对喷射器性能的影响规律。实验结果表明:当喷射器背压为3.9 MPa、工作流体温度为90℃、工作流体压力变化范围为8.0~10.0 MPa或引射流体压力变化范围为2.4~2.9 MPa、混合室截面直径在1.7~2.1 mm范围变化时,喷射器的喷射系数均随圆柱形混合室截面直径的增大而升高,且在实验工况范围内,以N2为工质的喷射系数随圆柱形混合室截面直径变化趋势相对平缓。Based on the empirical formula of the ejector proposed by E.Я.Coкoлов,an ejector is optimized and machined,and the experimental platform for measuring the performance of the ejector is built.Three kinds of natural working fluids of N2,CO2,and R290 were used to study the influence of the cross-sectional diameter change of the cylindrical mixing chamber on the performance of the ejector,with constant diameter of the diffuser chamber and high experimental pressure.The experimental results show that when the back pressure of the ejector is 3.9 MPa,the working fluid temperature is 90℃,the working fluid pressure is 8.0~10.0 MPa or ejector fluid pressure is 2.4~2.9 MPa,and the cylindrical mixing chamber cross-sectional diameter variation range from 1.7 to 2.1 mm,the ejection coefficient increases with the increase of cylindrical mixing chamber cross-sectional diameter.In a certain experimental range,the ejection coefficient changes relatively slowly with the cross-sectional diameter of the cylindrical mixing chamber when N2 is used as the working medium.

关 键 词：喷射器 混合室截面直径 自然工质 喷射系数 实验研究 

分 类 号：TB657[一般工业技术—制冷工程]