Superstructure Aerodynamics of the Type 26 Global Combat Ship
Superstructure Aerodynamics of the Type 26 Global Combat Ship
复制标题
26型全球战斗舰上层建筑空气动力学
DOI：
10.24868/issn.2515-818x.2018.038
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
M. White
中科院分区：
文献类型：
--
作者：
R. Mateer;S. A. Scott;I. Owen;M. White
26型城市级全球战斗舰是英国最新设计的护卫舰。第一艘舰HMS格拉斯哥号于2017年7月开始建造，预计将于2020年代中期服役，作为皇家海军23型杜克级护卫舰的替代品。设计和建造该船的主要承包商是BAE系统公司海事-海军船舶。26型上层建筑的特点是其光滑的倾斜表面是连续的沿着船舶从前甲板到飞行甲板。该tumblehome设计减少了船舶的雷达横截面，尽可能减少曲面和内部角落。26型也有一个庞大的桅杆，也有平坦的倾斜侧面，而围绕燃气涡轮机排气口的漏斗外壳位于主桅杆的后部，相对较低的上层建筑。相比之下，早期的23型有一个更分散的上层建筑，几乎没有几何特征来减少雷达反射;它也有一个更细长的桅杆，风速计从桅杆上安装，排气口更高。总体而言，隐形的26型护卫舰的空气动力学将与以前的23型护卫舰有很大不同，这将影响该舰直升机的作战范围。认识到上层建筑空气动力学对船舶设计的重要性，利物浦大学一直与BAE的同事密切合作，以确保随着上层建筑设计的发展，船舶上方的气流得到考虑。本文将介绍如何在设计周期内，计算流体动力学（CFD）已被用于分析非定常流的全尺寸船。它将展示如何使用CFD以及直升机飞行动力学建模来为着陆甲板前面的上层建筑几何形状提供设计选项。计算流体动力学还被用于为定位船舶风速计提供信息，并被用于预测船舶发动机废气的扩散和飞行甲板附近的空气温度分布。
The Type 26 City class Global Combat Ship is the latest design of UK frigate. Construction of the first ship, HMS Glasgow, began in July 2017 and the expectation is that it will enter service in the mid-2020s as a replacement for the Royal Navy’s Type 23 Duke class frigates. The main contractor for the design and construction of the ship is BAE Systems Maritime – Naval Ships. The Type 26 superstructure is characterised by its smooth sloping surfaces that are continuous along the ship from the fore deck to the flight deck. The tumblehome design reduces the ship’s radar cross-section, as does the minimisation of curved surfaces and internal corners. The Type 26 also has a bulky mast, also with flat sloping sides, while the funnel casing around the gas turbine exhaust uptake is located aft of the main mast and relatively low on the superstructure. In comparison, the earlier Type 23 has a much more fragmented superstructure with few geometric features for reduced radar reflection; it also has a more slender mast from which the anemometers are mounted, and the exhaust uptakes are higher. Overall the aerodynamics of the stealthy Type 26 frigate will be very different to the previous Type 23, and this will affect the operational envelope of the ship’s helicopters. Recognising the importance of superstructure aerodynamics to the ship design, the University of Liverpool has been working closely with colleagues from BAE to ensure that the air flow over the ship was considered as the superstructure design evolved. The paper will describe how, within the design cycle, Computational Fluid Dynamics (CFD) has been used to analyse the unsteady flow over the full-scale ship. It will show how CFD, together with helicopter flight dynamics modelling, was used to inform design options for the superstructure geometry ahead of the landing deck. CFD was also used to inform options for locating the ship’s anemometers and has been used to predict the dispersion of the ship’s engine exhaust gases and the air temperature distribution in the vicinity of the flight deck.