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Experimental validation of CFD simulations of free-fall lifeboat launches in regular waves

机译:常规波浪中自由降落救生艇发射的CFD模拟的实验验证

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摘要

This paper presents results from model tests and CFD simulations of lifeboat launches in regular waves. To the authors’ knowledge, this is the first time CFD simulations of lifeboat launches in waves have been validated. The predicted accelerations agreed well with the measured ones. The pitch velocity was slightly overestimated due to a slight difference in the geometric features at the bow between the CFD model and the physical model. The simulations provided in general accurate or conservative estimates of the local pressure at various locations on the hull except on one location on top of the canopy where the pressure was slightly under-predicted. Furthermore, it has been shown that to improve the predictions of the pressure loads on the aft wall of the lifeboat, the compressibility of air has to be taken into account in the simulations in order to capture the behaviour of the air-pocket behind the lifeboat.
机译:本文介绍了常规波浪中救生艇降落的模型测试和CFD模拟的结果。据作者所知,这是首次验证波浪中救生艇发射的CFD模拟。预测的加速度与测得的加速度非常吻合。由于CFD模型和物理模型之间弓形处的几何特征略有差异,因此俯仰速度略有高估。该模拟以一般准确或保守的方式估计了船体上各个位置的局部压力,但顶篷顶部的一个位置的压力略有不足。此外,已经表明,为了改善对救生艇后壁上压力负荷的预测,在仿真中必须考虑空气的可压缩性,以便捕获救生艇后面的气袋的行为。 。

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