A Zonal CFD Approach for Fully Nonlinear Simulations of Two Vessels in Launch and Recovery Operations

用于两艘船舶发射和回收操作完全非线性仿真的分区 CFD 方法

• 批准号: EP/N008847/1
• 负责人: Deborah Greaves
• 金额: $ 56.83万
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FN008847%2F1
• 关键词: Zonal; CFD; Approach; Fully; Nonlinear

Launch and recovery of small vehicles from a large vessel is a common operation in maritime sectors, such as launching and recovering unmanned underwater vehicles from a patrol of research vessel or launching and recovering lifeboats from offshore platforms or ships. Such operations are often performed in harsh sea conditions. The recent User Inspired Academic Challenge Workshop on Maritime Launch and Recovery, held in July 2014 and coordinated by BAE systems, identified various challenges associated with safe launch and recovery of off-board, surface and sub-surface assets from vessels while underway in severe sea conditions. One of them is the lack of an accurate and efficient modelling tool for predicting the hydrodynamic loads on and the motion of two floating bodies, such as vessels of different size which may be coupled by a non-rigid link, in close proximity in harsh seas. Such a tool may be employed to minimise the risk of collisions and unacceptable motions, and to facilitate early testing of new concepts and systems. It may also be used to estimate hydrodynamic loads during the deployment of a smaller vessel (for example, a lifeboat) and during recovery of a smaller vessel from the deck of a larger vessel. The difficulties associated with development of such tools lie in the following aspects: (1) the water waves in harsh sea states have to be simulated; (2) the motion of the small vehicle and change in its wetted surface during launch or recovery can be very large, possibly moving from totally dry in air to becoming entirely submerged; (3) the viscous effects may play an important role and cannot be ignored, and will affect the coupling between ocean waves and motion of the vehicles. Existing methods and tools available to the industry cannot deal with all of these issues together and typically require very high computational resources. This project will develop an accurate and efficient numerical model that can be applied routinely for the analysis of the motion and loadings of two bodies in close proximity with or without physical connection in high sea-states, which of course can be employed to analyse the launch and recovery process of a small vehicle from a large vessel and to calculate the hydrodynamics during the process. This will be achieved building upon the recent developed numerical methods and computer codes by the project partners and also the success of the past and ongoing collaborative work between them. In addition, the project will involve several industrial partners to ensure the delivery of the project and to promote impact.

从大型船舶上发射和回收小型车辆是海事部门的常见操作，例如从巡逻研究船上发射和回收无人潜水器或从海上平台或船舶上发射和回收救生艇。这些作业通常在恶劣的海况下进行。2014年7月举行的由BAE系统公司协调的关于海上发射和回收的用户启发学术挑战研讨会确定了与在恶劣海况下航行时从船上安全发射和回收船外、水面和水下资产相关的各种挑战。其中之一是缺乏准确和有效的建模工具来预测两个浮体的水动力载荷和运动，例如在恶劣的海洋中，可以通过非刚性连接件连接的不同大小的船只。这种工具可用于最小化碰撞和不可接受的运动的风险，并促进新概念和系统的早期测试。它也可用于在部署较小船舶（例如救生艇）期间以及在从较大船舶的甲板上回收较小船舶期间估计水动力载荷。研制这类工具的困难在于：（1）必须模拟恶劣海况下的水波;（2）小型飞行器在发射或回收过程中的运动及其湿表面的变化可能很大，可能从完全干燥的空气变成完全淹没;（3）粘性效应对波浪与航行体运动的耦合有着不可忽视的影响。行业现有的方法和工具无法同时处理所有这些问题，并且通常需要非常高的计算资源。该项目将开发一个准确和有效的数值模型，可例行用于分析两个物体在高海况下的运动和载荷，这两个物体在有或没有物理联系的情况下非常接近，当然也可用于分析从大型船只上发射和回收小型飞行器的过程，并计算这一过程中的流体动力学。这将在项目合作伙伴最近开发的数值方法和计算机代码以及他们之间过去和正在进行的合作工作的成功基础上实现。此外，该项目将涉及多个工业合作伙伴，以确保项目的交付并促进影响。

项目成果

Investigation of wave-driven hydroelastic interactions using numerical and physical modelling approaches

• DOI: 10.1016/j.apor.2022.103363
• 发表时间: 2022-12
• 期刊: Applied Ocean Research
• 影响因子: 4.3
• 作者: S. Brown;N. Xie;M. Hann;D. Greaves

Investigations of Offshore breaking Wave Impacts on a large offshore Structure

• DOI: 10.1016/j.jfluidstructs.2017.08.005
• 发表时间: 2017-11
• 期刊: Journal of Fluids and Structures
• 影响因子: 3.6
• 作者: Zhengjun Hu;T. Mai;D. Greaves;A. Raby

Numerical wave tank study of extreme waves and wave-structure interaction using OpenFoam®

• DOI: 10.1016/j.oceaneng.2016.09.017
• 发表时间: 2016-11
• 期刊: Ocean Engineering
• 影响因子: 5
• 作者: Zhengjun Hu;D. Greaves;A. Raby

Numerical investigation of air enclosed wave impacts in a depressurised tank

• DOI: 10.1016/j.oceaneng.2016.06.044
• 发表时间: 2016-09
• 期刊: Ocean Engineering
• 影响因子: 5
• 作者: Zhihua Ma;D. Causon;L. Qian;C. Mingham;P. M. Ferrer

A numerical and experimental investigation of the effect of side walls on hydrodynamic model testing in a wave flume

• DOI: 10.1016/j.oceaneng.2019.06.013
• 发表时间: 2019-08
• 期刊: Ocean Engineering
• 影响因子: 5
• 作者: N. Xie;M. Hann;R. Pemberton;G. Iglesias;D. Greaves