LAPSE:2020.0285
Published Article
LAPSE:2020.0285
CFD-Based Study of Nozzle Section Geometry Effects on the Performance of an Annular Multi-Nozzle Jet Pump
March 12, 2020
Abstract
CFD simulation and analysis of the internal flow field of the annular multi-nozzle jet pump are carried out to study the effects of nozzle section geometries on performance of the pump based on the finite volume method and realizable k-ε model. The results show that the square nozzle peak efficiency is 3% higher than that of the circular nozzle and 4.1% higher than that of the triangular nozzle. According to the simulation results, the mixing mechanism of the working fluid and second fluid is analyzed on the basis of the vortex dynamics. The results show the following: the recirculation area and the friction loss of the non-circular nozzle are reduced, and the mixing effect is improved; the streamwise vortex plays a major role in the mixing process and decays to an extremely small value at the end of the throat after attenuating rapidly in the suction chamber; compared with the streamwise vortex, the strength of the spanwise vortex is relatively stronger; the spanwise vortex still fluctuates after developing to a certain extent in the throat; the maximum streamwise vorticity peak value of the square nozzle is 31% more than that of the circular nozzle and 39% more than that of the triangular nozzle; the maximum spanwise vorticity peak value of the square nozzle is 19% less than that of the circular nozzle and 12% less than that of the triangular nozzle.
CFD simulation and analysis of the internal flow field of the annular multi-nozzle jet pump are carried out to study the effects of nozzle section geometries on performance of the pump based on the finite volume method and realizable k-ε model. The results show that the square nozzle peak efficiency is 3% higher than that of the circular nozzle and 4.1% higher than that of the triangular nozzle. According to the simulation results, the mixing mechanism of the working fluid and second fluid is analyzed on the basis of the vortex dynamics. The results show the following: the recirculation area and the friction loss of the non-circular nozzle are reduced, and the mixing effect is improved; the streamwise vortex plays a major role in the mixing process and decays to an extremely small value at the end of the throat after attenuating rapidly in the suction chamber; compared with the streamwise vortex, the strength of the spanwise vortex is relatively stronger; the spanwise vortex still fluctuates after developing to a certain extent in the throat; the maximum streamwise vorticity peak value of the square nozzle is 31% more than that of the circular nozzle and 39% more than that of the triangular nozzle; the maximum spanwise vorticity peak value of the square nozzle is 19% less than that of the circular nozzle and 12% less than that of the triangular nozzle.
Record ID
Keywords
annular multi-nozzle jet pump, numerical calculation, spanwise vortex, streamwise vortex
Subject
Suggested Citation
Xu K, Wang G, Wang L, Yun F, Sun W, Wang X, Chen X. CFD-Based Study of Nozzle Section Geometry Effects on the Performance of an Annular Multi-Nozzle Jet Pump. (2020). LAPSE:2020.0285
Author Affiliations
Xu K: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Wang G: College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China [ORCID]
Wang L: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Yun F: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Sun W: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Wang X: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Chen X: College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China; College of Mechanical and Electrical Engineering, Heilongjiang Institute of Technology, Harbin 150050, China
Wang G: College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China [ORCID]
Wang L: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Yun F: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Sun W: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Wang X: College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China
Chen X: College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China; College of Mechanical and Electrical Engineering, Heilongjiang Institute of Technology, Harbin 150050, China
Journal Name
Processes
Volume
8
Issue
2
Article Number
E133
Year
2020
Publication Date
2020-01-21
ISSN
2227-9717
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Original Submission
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PII: pr8020133, Publication Type: Journal Article
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Published Article
LAPSE:2020.0285
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External Link
https://doi.org/10.3390/pr8020133
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[v1] (Original Submission)
Mar 12, 2020
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Mar 12, 2020
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https://psecommunity.org/LAPSE:2020.0285
Record Owner
Calvin Tsay
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