Open Access
ARTICLE
Optimization Analysis of the Mixing Chamber and Diffuser of Ejector Based on Fano Flow Model
Lixing Zheng1,*, Weibo Wang2, Yiyan Zhang1, Lingmei Wang3, Wei Lu2
1 School of Electric Power, Civil Engineering and Architecture, Shanxi University, Taiyuan, 030006, China
2 School of Mechanical Engineering, Guangxi University, Nanning, 530004, China
3 Wind Turbine Monitoring and Diagnosis, NTRC of Shanxi Province, Taiyuan, 030006, China
* Corresponding Author: Lixing Zheng. Email:
(This article belongs to the Special Issue: Recent Advance of the Isogeometric Boundary Element Method and its Applications)
Computer Modeling in Engineering & Sciences 2022, 133(1), 153-170. https://doi.org/10.32604/cmes.2022.021235
Received 03 January 2022; Accepted 09 February 2022; Issue published 18 July 2022
Abstract
An improved model to calculate the length of the mixing chamber of the ejector was proposed on the basis of the Fano flow model, and a method to optimize the structures of the mixing chamber and diffuser of the ejector was put forward. The accuracy of the model was verified by comparing the theoretical results calculated using the model to experimental data reported in literature. Variations in the length of the mixing chamber
Lm and length of the diffuser
Ld with respect to variations in the outlet temperature of the ejector
Tc, outlet pressure of the ejector
pc, and the expansion ratio of the pressure of the primary flow to that of the secondary flow
pg/
pe were investigated. Moreover, variations in
Lm and
Ld with respect to variations in the ratio of the diameter of the throat of the motive nozzle to the diameter of the mixing chamber
dg0/
dc3 and ratio of the outlet diameter of the diffuser to the diameter of the mixing chamber
dc/
dc3 were investigated. The distribution of flow fields in the ejector was simulated. Increasing
Lm and
dc3 reduced
Tc and
pc. Moreover, reducing
pg/
pe or
dg0/
dc3 reduced
Tc and
pc. The length of the mixed section
Lm2, which was determined on the basis of the Fano flow model, increased as
pg increased and decreased as
dc3 increased. The mixing length
Lm1, which was considered the primary flow expansion, showed the opposite trend with that of
Lm2. Moreover,
Ld increased as
pg/
pe and
dc/
dc3 increased. When the value of
dc was 1.8 to 2.0 times as high as that of
dc3, the semi-cone angle of the diffuser ranged between 6° and 12°. At a constant
dc/
dc3, decreasing
Tc and
pc increased
Ld.
Keywords
Cite This Article
Zheng, L., Wang, W., Zhang, Y., Wang, L., Lu, W. (2022). Optimization Analysis of the Mixing Chamber and Diffuser of Ejector Based on Fano Flow Model.
CMES-Computer Modeling in Engineering & Sciences, 133(1), 153–170. https://doi.org/10.32604/cmes.2022.021235