【作者】 许辉；

【导师】 邹早建；

【作者基本信息】 武汉理工大学 ， 船舶与海洋结构物设计制造， 2004， 硕士

【摘要】 小水线面双体船(Small Waterplane Area Twin Hulls，SWATH)是近三十年逐渐发展起来的具有独特船型的高性能船舶。和传统船型相比，SWATH具有更多的优势，特别由于其优良的耐波性，目前已被大多数有造船及海洋探测优势的国家广泛采用。我国作为世界上的海洋大国之一，面临着人口的膨胀，土地的减少，能源的短缺等困难，在21世纪这个海洋的世纪，开发和利用海洋对我国尤为重要。在军事应用方面，SWATH也具有着无可比拟的优越性。因此，我国很有必要拥有自己的SWATH。自然而然，我们要对SWATH进行一系列的开发研究。 现在，计算流体动力学(Computational Fluid Dynamics，CFD)已经发展得相当成熟，各种CFD商业软件如雨后春笋般涌现出来，而且涉及的范围越来越广。CFD商业软件以其模拟复杂流动现象的强大功能、人机对话的界面操作以及直观清晰的流场显示得到了人们的广泛关注，其发展在西方国家得到了工业界和政府部门的大力支持。借助CFD商业软件这一开发平台，研究人员可以避免编程方面的重复性劳动，减轻繁琐沉重的编程工作量，有望加快自身工作的进度和提高自身工作的质量和水平。因此，我们完全可以利用商业软件来协助对SWATH的研究，加快我国开发SWATH这一高性能船型的步伐。 本文即利用商业软件FLUENT对SWATH的粘性流场进行了数值模拟。首先对一SWATH数学船型做了研究，得到不同航速下的物面总压力、物面切应力分布及相应的粘性阻力系数等结果，并将各航速下的粘性阻力计算结果和经验公式估算结果做了比较，吻合得较好。随后对一真实SWATH的粘性流场进行数值模拟。由各点的型值来建立模型，除了得到阻力方面的结果，还对该船型桨盘处的伴流分布做了研究。通过对这些例子的计算，进一步验证了利用FLUENT计算SWATH粘性流场的有效性和实用性。 本文是将商业软件用于SWATH粘性流场计算的一个尝试和探讨，随着今武汉理工大学硕士学位论文后工作的深入，将会取得更加令人满意的结果。随着我国对造船的日益重视，对CFD科研力量投入的日益增加，相信在不久的将来，我国对SWrA’1，H这类高性能船型的研究将会上一个新的台阶。更多还原

【Abstract】 Small Waterplane Area Twin Hulls (SWATH) is a kind of high performance ship with special shape which has been developed during last decades. Compared with conventional ships SWATH has more advantages. Especially because of its excellent seakeeping performance, SWATH has been accepted by some countries accomplished in shipbuilding and ocean exploration. China is one of the greatest ocean countries in the world, meanwhile it faces many difficulties such as population expanding, soil decreasing and energy sources reducing. It is very important for our country to exploit and use ocean resource in the 21 century. SWATH also has enormous advantages in aspect of military application. Therefore it is much necessary for us to possess our own SWATH and we must carry out a series of research into SWATH.Nowadays, Computational Fluid Dynamics (CFD) has developed quite mature. Many CFD commercial softwares appear and the scope related to becomes wider and wider. CFD commercial softwares receive extensive attention for their strong function to simulate complicated flow phenomena, man-machine conversation interfacial operation, intuitionistic and clear flow field visualization. The development of the softwares gains powerful sustainment from industry and government in West countries. In virtue of CFD commercial software workbench, researchers can avoid repeating work of programme, lighten heavy programme workload, accelerate work speed and enhance work quality. So we can completely make use of commercial softwares to help studying and developing SWATH.In this paper the viscous flows around SWATH are simulated based on the commercial software FLUENT. Firstly a mathematical SWATH in full scale is studied. The numerical results of total pressure, wall shear stress, corresponding viscous resistance coefficient at different velocity and so on are obtained. The computational viscous resistance coefficients are compared with the estimated ones using empirical formula and the results are found to be in good agreement.Then the numerical simulation of the flow around a real full-scale SWATH ship is conducted. The full-scale SWATH model is established through every offsets. In addition to resistance results the wake distribution at propeller plan is also obtained. In conclusion, the validity and practicability of the software FLUENT to predict the three-dimensional viscous flow field of SWATH are proved by these examples.This paper is an attempt to use commercial software in simulating viscous flow field of SWATH. More satisfying results would be achieved along with further study. As we put emphasis on shipbuilding and invest more in CFD research, it is believed that the research of our country on high performance ship like SWATH would rise to a new stage in future.更多还原