摘要
随着自动化技术的发展,风帆助航系统在以下方向发展成为可能:①利用计算机实现对风帆的自适应操纵;②风帆与主动力装置的优化配合,以经济航速航行;③复杂型线风帆的操纵、应用和推广成为可能。风帆的型线设计在近代有着较大的改进,机翼形、组合翼型、圆弧形、圆筒型、百叶窗型、多翼面高升力型等。我校在前期针对圆弧型风帆的设计,通过对其流体动力特性的数值分析和风洞试验结果,在型线方面进行改进,分析了贝壳式迎风面中部卸载,并在卸载区域假设风轮机增加风帆在特殊风向攻角下的综合性能。采用Pro\E进行风帆的三维曲面设计,并利用有限元分析软件Ansys对贝壳式风帆迎风面上的压力分布、风帆产生的升力和阻力等流体动力特性进行了数值分析。贝壳式风帆中部的风轮机在风向大攻角下,类似圆筒风帆起到辅推作用。该款复合型线设计风帆的分析结果,可为开发商用风帆助航节能船舶提供一定的指导。
Along with the development of automation technology, there are three possible development directions. First, adaptive control to sail would be realized by computer. Second, sail and power plant＇s combination would be optimized for economic speed. Third, the factors of manipulation, line sail application and promotion would be possible .The type line of sail in modern design has great improvement, just like wing shape, combination wing type, circular arc form of cylinder type, shutters, and the wing of high lift. In the design of circular arc sail, by taking the fluid dynamic characteristics of the numerical analysis and wind tunnel test results, we have improved the type line and analyzed the windward central unloading. We use the ProkE to sail of 3d surface design. By the analysis software we analyze shells on the wind pressure type sail distribution of numerical analysis. The results of numerical analysis coincide with test results in wind tunnel, which can be the guidance for the development of sail assisted propulsion.
出处
《广东造船》
2011年第6期36-39,49,共5页
Guangdong shipbuilding
基金
上海市科委重点项目(08210511800)
