Scale effects of incipient cavitation for high-speed flows

The scale effects of incipient cavitation in high-speed flows have been studied in experiments, in which series of sudden enlargements in pipes with different expansion ratios, are employed. The relationship between the incipient cavitation and flow velocity is also investigated and shows that the s...

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Bibliographic Details
Published in:Proceedings of the Institution of Civil Engineers. Water management 2013-07, Vol.166 (7), p.402-408
Main Authors: ZHANG, Jian-Min, WANG, Yu-Rong, QING YANG, XU, Wei-Lin, LIN, Peng-Zhi
Format: Article
Language:English
Subjects:
Atmospheric pressure
Cavitation
Dimensional analysis
Empirical analysis
Exact sciences and technology
Expansion
Experiments
Flow velocity
Fluid dynamics
Fundamental areas of phenomenology (including applications)
High speed
Hydraulic structures
Instrumentation for fluid dynamics
Nonhomogeneous flows
Physics
Pipe
Scale effect
Studies
Water management
Water quality
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Summary:The scale effects of incipient cavitation in high-speed flows have been studied in experiments, in which series of sudden enlargements in pipes with different expansion ratios, are employed. The relationship between the incipient cavitation and flow velocity is also investigated and shows that the scale effect indeed exists. Based on the test data, an empirical formula for incipient cavitation that takes scale effects into account is derived and validated. The formula has been validated with corresponding experimental data and good agreement has been obtained. The proposed formula can be used to forecast incipient cavitation of hydraulic structures in prototype with high-speed flow.
ISSN:1741-7589
1751-7729
DOI:10.1680/wama.11.00085