Vertical Axis Wind Turbine Design and Certification Software (Axsym Ltd)

随着全球对风力发电的需求日益增加，以及世界各国政府为促进风电行业的发展而制定的激励计划，大量的风力涡轮机概念正在被制造出来。一般来说，这些概念分为两类：水平轴风力涡轮机(HAWT)和垂直轴风力涡轮机(VAWT)，水平轴风力涡轮机(HAWT)绕轴旋转指向风力，垂直轴风力涡轮机(VAWT)绕垂直轴旋转。该行业进行的绝大多数研究和开发工作都集中在两个和三个大型叶片HAWT上。因此，已有分析工具可用于旋转气动机械性能的大多数方面和HAWT的负荷分析，但没有可用于VAWT或具有四个或更多叶片的微型和小型HWAT的旋转气动力学分析方法。目前VAWT和小型HAWT的设计工作多采用解析近似，一般忽略非定常气动影响。为了正确预测载荷和性能，需要建立非定常空气动力学模型，这在HAWT研究界得到了很好的确立。这一能力对VAWT系统中的负载和性能的准确预测也是至关重要的。本项目旨在开发和验证旋转气动力学分析程序，以模拟VAWT和微型和小型HAWT的性能、负载和振动，以支持设计、认证和选址分析要求。

With the increasing global appetite for wind power and worldwide government incentive schemes to promote wind industry growth a plethora of wind turbine concepts are being manufactured. Generally the concepts are split into two classes: horizontal axis wind turbines (HAWT) with rotation about a shaft pointing into wind and vertical axis wind turbines (VAWT) with rotation about a vertical shaft. The vast majority of research and development work undertaken in this industry has focused on large two and three bladed HAWTs. As a result there are analytical tools available for most aspects of rotary aeromechanic performance and loads analysis of HAWTs but there are no rotary aeromechanics analytical methods available for VAWTs or for mirco and small HWATs with four blades or more. Currently design work of VAWT and small HAWT must use analytical approximations, generally neglecting unsteady aerodynamic effect. The need to model unsteady aerodynamics, in order to correctly predict loads and performance is well establish in the HAWT research community. This capability is also vital for the accurate prediction of loads and performance in VAWT systems.This project seeks to develop and validate a rotary aeromechanics analysis code to simulate the performance, loads and vibration of VAWTs and micro and small HAWTs to support design, certification and siting analysis requirements.