Reduction of tip and end-wall losses in compressors using macro/micro surface structures

为了追求更高的效率、更宽的工作范围和更紧凑的部件，人们一直在寻找能够减少透平机械压力损失的方法。该研究项目旨在利用仿生的微/宏观表面结构来显著降低压气机的端壁损失和尖端泄漏损失。表面特征将借助数值模拟进行设计，并使用先进的激光制造技术进行制造。然后，将在线性叶栅中进行一系列精心设计的实验，以研究改变图案几何形状对端壁损失和尖端损失的影响，确定给定来流条件下的最佳几何形状，并检验起作用的物理流动机制。根据实验结果，还将制定设计适合实际环境的表面结构的指导方针。EPSRC研究领域：流体动力学

In pursuit of higher efficiency, wider operating range and more compact components, methods capable of reducing pressure losses in turbomachines are constantly being sought. This research project aims to achieve a significant reduction of end-wall loss and tip leakage loss in compressors using bio-inspired micro/macro surface structures. The surface features will be designed with the aid of numerical simulations and manufactured using advanced laser manufacturing techniques. A series of carefully designed experiments will then be carried out in a linear cascade to investigate the effect of changing pattern geometry on end-wall losses and tip losses, to identify the optimal geometry for given incoming flow conditions and to examine the physical flow mechanisms at play. Based on the experimental results, guidelines for designing suitable surface structures for practical settings will be also developed.EPSRC research areas: Fluid dynamics