Research on pressure characteristics of panels subjected to collision of compressible jet

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (3) : 178-181.

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Research on pressure characteristics of panels subjected to collision of compressible jet

SUN Long-quan 1 ZHANG Zhong-yu 1 DING Jian-jun 1 LI Gang 1 SUN Shi-li 2

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Abstract

The problem of jet impact on panels has been extensively concerned because collision between compressible jet and panels can cause severely structural damage. The compressibility of liquids dominates on the initial stage of collision. Considering the compressibility and free surface deformation, doubly asymptotic approximation was improved to simulate the pressure distribution of rigid panels. The numerical results are in good agreement with the previous work. Then the method was coupled with FEM method to solve fluid-structure interaction problems, which can successfully applied for elastic panels. The results show that one fifth negative pressure area is founded around the center of rigid panels, and free surface deformation makes pulse width and impulse increased significantly. The elastic vibration has no influence on the peak of pressure, but it can greatly change the pressure distribution, which would restrain negative pressure effectively.

Key words

collision / doubly asymptotic approximation / fluid-structure interaction / free surface deformation / elastic vibration

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SUN Long-quan ZHANG Zhong-yu DING Jian-jun LI Gang SUN Shi-li . Research on pressure characteristics of panels subjected to collision of compressible jet [J]. Journal of Vibration and Shock, 2013, 32(3): 178-181