Three-dimensionality and Instabilities of Leading-Edge Vortices

飞机经常受到湍流和阵风的影响，这增加了空气动力，并成为机翼可控性的问题。气流分离和在机翼上形成“涡流”也发生在具有扑翼、风力涡轮机和旋转叶片的无人驾驶飞行器（UAV）上。这个项目的主要目的是实现一个完整的理解的启动和分离流的三维性的增长。第二个目标是通过激励或延迟不稳定性的启动来开发流动/涡流控制方法。拟议的项目将利用最先进的设施和方法，通过实验（巴斯大学）和计算（伦敦帝国理工学院伦敦）相结合的方法来解决这些问题。其中包括通过使用力、变形和流动测量以及数值模拟进行的水洞实验。预期的成果包括更好地理解非定常流中从机翼脱落的流动分离和涡流，并开发可用于减轻机翼上的极端载荷的新型流动控制方法。这可能对轻型飞机、无人机和风力涡轮机的设计产生主要影响，并有助于提高安全性。

Aircraft is often subject to turbulence and gusts, which increase the aerodynamic forces and become a concern for the controllability of wings. Flow separation and formation of a "vortex" over the wing also occurs for unmanned air vehicles (UAVs) with flapping wings, wind turbines and rotating blades. The main aim of this project is to achieve a complete understanding of the initiation and growth of the three-dimensionality of the separated flow. The second aim is to develop flow/vortex control methods by means of excitation or delay of the initiation of instabilities. The proposed project will address these aspects through a combined experimental (University of Bath) and computational (Imperial College London) approach using state of the art facilities and methods. These include water tunnel experiments by using force, deformation and flow measurements as well as numerical simulations. Expected outcomes include better understanding of the flow separation and vortices shed from the wings in unsteady flows and developing novel flow control methods which could be used for alleviation of extreme loads on wings. This could have main impact on the design of lighter aircraft, UAVs and wind turbines as well as help with improved safety.