【作者】 李海军； 高洪涛；

【Author】 LI Hai-jun,GAO Hong-tao Dalian Maritime University,Dalian 116026,China

【机构】 大连海事大学；

【摘要】 在以往研究的基础上,采用已经证明适用于蒸汽喷射器模拟计算的模型及计算方法,模拟不同喷嘴结构时,喷射器内部的流动情况,得出喷嘴收缩段长度为2-6倍喷嘴喉口直径、喷嘴扩张段长度为6倍喷嘴喉口直径时,喷射器的性能最佳。并给出喷嘴出口马赫数与喷射器膨胀比和临界压缩比的关系式。膨胀比和临界压缩比两个参数的使用,使得出的结论的适用性更加广泛。更多还原

【Abstract】 In the present work, an improved CFD program, which was proved suitable for simulating flow profile in the steam ejector formerly, is used to study the effect of the nozzle structure on the steam ejector performance. When nozzle converging segment length is 2 to 6 times of nozzle throat diameter, nozzle diverging segment length is 6 times of nozzle throat diameter, the performance of the ejector will be perfect. Two compound parameters, expansion ration and critical compression ratio, are introduced to conclude relationships between Mach number at the nozzle outlet and maximum expansion, and critical compression ratio.更多还原