Time-Resolved PIV Measurements and Numerical Study of Water Entry of a Wedge

doi:10.16183/j.cnki.jsjtu.2019.065

Abstract

Abstract:

In order to study the wedge water entry problem and the feasibility of indirect evaluation of the slamming pressure based on particle image velocimetry (PIV), tests were conducted on the water entry of wedges at different deadrise angles using time-resolved PIV (TR-PIV). A numerical simulation was performed, and the transient pressure was reconstructed based on the PIV results. The motion response and flow field structure in the process of entering the water were analyzed in detail, and the accuracy and applicability of the pressure reconstruction scheme based TR-PIV were discussed. The results show that a good agreement is observed in TR-PIV measurements of the water entry and the numerical results. For different grid spacings and time steps, the pressure reconstruction scheme always has a good accuracy. The results of the slamming pressure field reconstruction of the wedges at different deadrise angles based on TR-PIV agree well with the numerical results, so do the evaluation results of the slamming load.

Key words: wedge, water entry, time-resolved PIV (TR-PIV), pressure reconstruction

CLC Number:

U661.31

SHE Wenxuan, GUO Chunyu, ZHOU Guangli, WU Tiecheng, XU Peng. Time-Resolved PIV Measurements and Numerical Study of Water Entry of a Wedge[J]. Journal of Shanghai Jiaotong University, 2020, 54(8): 839-848.

Figures/Tables 12

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