2012 Fiscal Year Final Research Report
Establishment of CFD method for the hydrodynamic design of high-speed cavitating water jet nozzle
| Project/Area Number |
22560177
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Nihon University |
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Principal Investigator |
PENG Guoyi 日本大学, 工学部, 教授 (90295527)
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| Co-Investigator(Kenkyū-buntansha) |
SHIMIZU Seiji 日本大学, 工学部, 教授 (80154293)
FUJIKAWA Shigeo 北海道大学, 大学院・工学研究院, 名誉教授 (70111937)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 気液混相流 / ウォータージェット / キャビテーション / 数値シミュレーション / 可視化計測 |
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| Research Abstract |
This work has been performed on purpose to establish a practical CFD method for the numerical simulation of high-speed submerged water jets as well as the hydrodynamic design of jet nozzles. The main results can be summarized as follows: (1) A compressible mixture flow method based a simplified estimation of bubble cavitation is established. (2) A modification on the eddy viscosity of cavitating flow is proposed considering the effect of bubble expanding and contracting. (3) Numerical simulation of turbulent activating jets issuing form submerged orifice nozzle were carried out and the reliability of present method has been verified experimentally. (4) A new sheathed orifice nozzle is developed and its property has been evaluated via visualization experiment.
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