Influence of Inlet Duct Length on the Hydraulic Performance of the Waterjet Propulsion Device

This study uses a combination of computational fluid dynamics (CFD) and experimental research to explore the influence of the length of the inlet duct on the hydraulic performance of the water jet propulsion pump device. By extending the oblique, straight, and long pipe section of the inlet duct, si...

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Bibliographic Details
Published in:Shock and vibration 2021, Vol.2021 (1)
Main Authors: Chen, Xionghuan, Cheng, Li, Wang, Chuan, Luo, Can
Format: Article
Language:English
Subjects:
Accuracy
Cavitation
Computational fluid dynamics
Efficiency
Flow velocity
Fluid dynamics
Hydraulic jets
Hydraulics
Inlet flow
Jet propulsion
Optimization
Pipes
Pressure distribution
Propulsion systems
Simulation
Velocity distribution
Vorticity
Working conditions
Citations: Items that this one cites
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Summary:This study uses a combination of computational fluid dynamics (CFD) and experimental research to explore the influence of the length of the inlet duct on the hydraulic performance of the water jet propulsion pump device. By extending the oblique, straight, and long pipe section of the inlet duct, six sets of schemes were designed. The research results show that as the length of the inlet duct increases, the head, thrust, and inlet duct efficiency of the water jet propulsion pump first increase and then decrease, reaching the maximum value in scheme 4, but it has little effect on the efficiency of the entire water jet propulsion system. In addition, after extending the obliquely straight long pipe section of the inlet flow channel, the velocity distribution of the outlet section of the flow channel is gradually uniform, and the absolute value of the vorticity first increases and decreases, but the uniformity of the velocity distribution and the weighted average angle change little. This research enriches the research theory of the inlet duct and also provides a reference for the selection of inlet duct length and its performance optimization.
ISSN:1070-9622
1875-9203
DOI:10.1155/2021/6676601