A practical mixture flow approach to the numerical simulation of turbulent cavitating flows is developed by coupling a simplified estimation of bubble cavitation to a compressible mixture flow computation. The mean flow of two-phase mixture is calculated by neglecting the slip between bubbles and surround liquid. Navier-Stokes equations for compressible fluids are used to describe the unsteady mean flow field and the RNG k-ε model is adopted for modeling of the flow turbulence. The intensity of cavitation in a local field is evaluated by the volume fraction of gas phase varying with the mean flow. The flow structure of submerged water jets issuing from an orifice nozzle is investigated numerically. Both non-cavitating and cavitating jets are calculated under different cavitation numbers in order to clarify the cavitation property of submerged water jet. The results demonstrate that the intensity of cavitation denoted by the maximum value of gas volume fraction and the area of strong cavitation indicted by high value of gas volume fraction increase with the decrease of cavitation number. Under the effect of cavitation bubbles the discharge coefficient of orifice nozzle decreases with the cavitation number.
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ASME-JSME-KSME 2011 Joint Fluids Engineering Conference
July 24–29, 2011
Hamamatsu, Japan
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-4441-0
PROCEEDINGS PAPER
Numerical Investigation on the Structure of High-Speed Cavitating Water Jet Issuing From an Orifice Nozzle Available to Purchase
Guoyi Peng,
Guoyi Peng
Nihon University, Koriyama, Fukushima, Japan
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Hideto Ito,
Hideto Ito
Nihon University, Koriyama, Fukushima, Japan
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Seiji Shimizu,
Seiji Shimizu
Nihon University, Koriyama, Fukushima, Japan
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Shigeo Fujikawa
Shigeo Fujikawa
Hokkaido University, Sapporo, Hokkaido, Japan
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Guoyi Peng
Nihon University, Koriyama, Fukushima, Japan
Hideto Ito
Nihon University, Koriyama, Fukushima, Japan
Seiji Shimizu
Nihon University, Koriyama, Fukushima, Japan
Shigeo Fujikawa
Hokkaido University, Sapporo, Hokkaido, Japan
Paper No:
AJK2011-33023, pp. 275-280; 6 pages
Published Online:
May 25, 2012
Citation
Peng, G, Ito, H, Shimizu, S, & Fujikawa, S. "Numerical Investigation on the Structure of High-Speed Cavitating Water Jet Issuing From an Orifice Nozzle." Proceedings of the ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 2, Fora. Hamamatsu, Japan. July 24–29, 2011. pp. 275-280. ASME. https://doi.org/10.1115/AJK2011-33023
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