Yan Jia, Shu Yuetong, Jiang Jing, Wen Huaqin
School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China.
School of Artificial Intelligence, Yantai Institute of Technology, Yantai 264003, China.
Entropy (Basel). 2022 Dec 21;25(1):7. doi: 10.3390/e25010007.
The ejector performance varies with the mixing chamber length which is largely dependent on the fluid liquid volume fraction at the inlet. In this study, numerical simulations are conducted to optimize two mixing chamber lengths of a two-phase ejector under varied liquid volume fractions of 0-0.1 in two inlet fluids. The main findings are as follows: (1) The two optimal lengths of constant-pressure and constant-area mixing chambers are identified within 23-44 mm and 15-18 mm, respectively, when the primary inlet fluid is in two-phase; (2) the two optimal lengths are 2-5 mm and 9-15 mm, respectively, when the secondary inlet fluid is in two-phase; (3) when both inlets are in two-phase, the two optimal lengths are ranged in 5-23 mm and 6-18 mm; (4) little liquid within inlet fluid has a significant influence on ejector performances; and (5) optimal constant-pressure mixing chamber length and the sum of the two optimal lengths increase with the primary flow inlet liquid volume fraction but decrease with that of the secondary flow inlet.
喷射器的性能随混合室长度而变化，混合室长度在很大程度上取决于入口处的流体液体体积分数。在本研究中，进行了数值模拟，以优化两相喷射器在两种入口流体中液体体积分数为0 - 0.1变化时的两种混合室长度。主要研究结果如下：(1)当一次入口流体为两相时，恒压和恒面积混合室的两个最佳长度分别在23 - 44毫米和15 - 18毫米范围内；(2)当二次入口流体为两相时，两个最佳长度分别为2 - 5毫米和9 - 15毫米；(3)当两个入口均为两相时，两个最佳长度分别在5 - 23毫米和6 - 18毫米范围内；(4)入口流体中少量液体对喷射器性能有显著影响；(5)最佳恒压混合室长度以及两个最佳长度之和随一次流入口液体体积分数增加而增加，但随二次流入口液体体积分数增加而减小。
