Tip clearance in pump induces tip leakage vortex (TLV), which interacts with the main flow and leads to instability of flow pattern and decrease in pump performance. In this work, a closed-loop experimental rig with high-speed observation for a mixed flow pump is established, and the numerical simulation on tip leakage cavitation is conducted with experimental validation. A new double-hump pattern of tip leakage cavitation is first observed in the mixed flow pump. Results show that primary tip leakage vortex cavitation develops from a linear pattern to a banded pattern and, finally, to a double-hump pattern. The spatial–temporal evolution of tip leakage cavitation with double-hump can be classified into four stages: incepting stage, growing stage, merging stage, and propagating stage. The inception of the front hump is found to correspond to the periodic evolution of the specific passage vortex-tip leakage vortex (PV-TLV) pair. Affected by the propagation of the high-pressure area at the passage outlet, the PV wanders in the downstream passage, which greatly affects the intensity of tip leakage flow. The away motion of the PV from the tip clearance brings stronger tip leakage flow and results in the intensified TLV and the lower core pressure. As a result, the front hump incepts, grows, and travels downstream. Finally, it merges with the rear hump and together propagates to the downstream passage.
Skip Nav Destination
Article navigation
April 2023
Research Article|
April 27 2023
Spatial-temporal evolution of tip leakage cavitation with double-hump in a mixed flow pump with tip clearance
Special Collection:
Cavitation
Han Yadong (韩亚东)
;
Han Yadong (韩亚东)
(Conceptualization, Investigation, Methodology, Software, Validation, Visualization, Writing – original draft, Writing – review & editing)
State Key Laboratory of Hydroscience and Engineering, Department of Energy and Power Engineering, Tsinghua University
, Beijing 100084, China
Search for other works by this author on:
Tan Lei (谭磊)
Tan Lei (谭磊)
a)
(Conceptualization, Funding acquisition, Investigation, Methodology, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing)
State Key Laboratory of Hydroscience and Engineering, Department of Energy and Power Engineering, Tsinghua University
, Beijing 100084, China
a)Author to whom correspondence should be addressed: tanlei@mail.tsinghua.edu.cn. Tel.: +86-10-6278-0605
Search for other works by this author on:
a)Author to whom correspondence should be addressed: tanlei@mail.tsinghua.edu.cn. Tel.: +86-10-6278-0605
Note: This paper is part of the special topic, Cavitation.
Physics of Fluids 35, 045152 (2023)
Article history
Received:
February 07 2023
Accepted:
April 08 2023
Citation
Yadong Han, Lei Tan; Spatial-temporal evolution of tip leakage cavitation with double-hump in a mixed flow pump with tip clearance. Physics of Fluids 1 April 2023; 35 (4): 045152. https://doi.org/10.1063/5.0145676
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Pay-Per-View Access
$40.00
Citing articles via
On Oreology, the fracture and flow of “milk's favorite cookie®”
Crystal E. Owens, Max R. Fan (范瑞), et al.
A unified theory for bubble dynamics
A-Man Zhang (张阿漫), 张阿漫, et al.
Fluid–structure interaction on vibrating square prisms considering interference effects
Zengshun Chen (陈增顺), 陈增顺, et al.
Related Content
Numerical investigations on the mechanisms of the tip leakage vortex cavitation development in a cryogenic inducer with large eddy simulation
Physics of Fluids (July 2023)
Role of wall roughness on interaction of leakage flow and main flow in a mixed flow pump with tip clearance
Physics of Fluids (January 2024)
Energy performance and flow characteristics of a slanted axial-flow pump under cavitation conditions
Physics of Fluids (March 2022)
On cavitation caused by tip clearance of a flat-plate hydrofoil
Physics of Fluids (November 2024)
Numerical investigation of how gap size influences tip leakage vortex cavitation inception using a Eulerian – Lagrangian method
Physics of Fluids (January 2023)