期刊
JOURNAL OF HYDRODYNAMICS
卷 21, 期 6, 页码 750-757出版社
SPRINGER
DOI: 10.1016/S1001-6058(08)60209-7
关键词
water entry; Smoothed Particle Hydrodynamics (SPH); non-reflection boundary
类别
资金
- National Natural Science Foundation of China [10802049]
- Shanghai Leading Academic Discipline Project [B206]
- Research Found of State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University [GKZD010806]
The hydrodynamic problem of a two-dimensional wedge entering water is studied based on Smoothed Particle Hydrodynamics (SPH) model. A non-reflection boundary treatment for SPH method is proposed to reduce the reflection of sound waves. The boundary pressure is obtained using an improved coupling boundary treatment approach, which is validated by comparing the simulation results with experimental and analytical results in literature. A series of cases with different initial entering velocities are simulated. The maximum force on the wedge and the corresponding time required to reach it for the different cases of initial entering velocities of the wedge are chained and fitted into formulas against the initial entering velocity of the wedge. The maximum drag coefficients of the wedge for the different cases with Froude number greater than 2 are all near the value of 0.91.
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