ELHIMER, Mehdi; JACQUES, Nicolas; EL MALKI ALAOUI, Aboulghit; GABILLET, Céline

doi:10.1016/j.jfluidstructs.2016.12.012

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ELHIMER, Mehdi
Institut de Recherche Dupuy de Lôme [IRDL]
École Nationale Supérieure de Techniques Avancées Bretagne [ENSTA Bretagne]

JACQUES, Nicolas
Institut de Recherche Dupuy de Lôme [IRDL]
École Nationale Supérieure de Techniques Avancées Bretagne [ENSTA Bretagne]

EL MALKI ALAOUI, Aboulghit
Institut de Recherche Dupuy de Lôme [IRDL]
École Nationale Supérieure de Techniques Avancées Bretagne [ENSTA Bretagne]

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Journal of Fluids and Structures. 2017-04, vol. 70, p. 24-46

Elsevier

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The problem of the impact between a rigid body and a gas-liquid mixture is relevant to various engineering applications, including the design of breakwaters and LNG containers. In the present study, the particular problem of the impact of a rigid cone upon the surface of an aerated liquid is investigated. Numerical simulations of water entry of cones with different deadrise angles (7° and 15°) were performed using an explicit finite element method. The air-water mixture is modelled as a homogeneous fluid with a specific equation of state. In addition, experimental tests of the impact of a cone with a deadrise angle of 7° on the surface of bubbly water were performed. The air volume fraction was measured prior to the impact tests using optical probes, and the instantaneous impact force on the cone was measured using strain gauges. The results highlight a significant reduction of the impact load with the increase of the air volume fraction. Moreover, the numerical results show that this reduction is also dependent on the impact velocity. This phenomenon is found to be related to the nonlinearity of the equation of state of the air-water mixture.< Leer menos

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Water entry

Aerated liquid

Fluid-structure interaction

Impact

Rigid cone

Slamming

Measurement

Modeling

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The influence of aeration and compressibility on slamming loads during cone water entry

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