Testing of the drag reduction mechanism of skinsuit materials for design

在许多以速度为基础的运动中，如自行车，空气动力阻力在长距离耐力赛或短距离高速比赛中对运动员的可达到速度起着限制作用。KQS Inc.是一家专门从事高性能运动器材的合同设计和工程公司，总部设在安大略的多伦多。约克大学、多伦多大学和KQS公司的研究人员之间的这一合作研究项目的目标是是建立设计标准的skinsuits杠杆可能的空气动力学性能增强优秀公路自行车运动员的阻力减少。技术改进将进一步支持加拿大在创新体育设备方面的记录，这对加拿大经济具有重要意义。该项目将采用实验方法测量模型几何形状上的阻力和相应的流动拓扑结构，该模型几何形状具有基于织物的表面粗糙度和流动行程（使用螺纹接缝），以确定可能的相互作用以增强减阻。直接力测量结合流场的测量将使用粒子图像测速技术，将用于建立知识的基础上发生的物理机制。将进行粗糙度拓扑结构和接缝几何形状的参数调查，以支持旨在更好地理解现有简单或规则粗糙度和行程几何形状知识之外的减阻机制的分析。这些知识将反过来被用来优化运动员的紧身衣，在这些区域中，流动分离可能会被延迟，以提高空气动力学性能。

In many speed-based sports, such as cycling, aerodynamic drag plays a limiting role in the achievable speed of the athlete over long endurance races or short high-speed events. KQS Inc. is a contract design and engineering company specializing in high-performance sport equipment and is based in Toronto, Ontario. The goal of this collaborative research project between researchers at York University, the University of Toronto and KQS Inc. is to establish design criteria for skinsuits to leverage possible aerodynamic performance enhancements of elite road-cycling athletes by the reduction of drag force. The technological improvements will further support the Canadian track record in innovative sports equipment, which is significant to the Canadian economy. This project will take an experimental approach to the measurement of drag forces and corresponding flow topologies over a model geometry with textile-based surface roughness and flow trips (using threaded seams) to determine possible interaction for enhanced drag reduction. Direct force measurements in conjunction with measurements of the flow field will using particle image velocimetry will be used to build knowledge on the underlying physical mechanisms occurring. A parametric investigation of roughness topology and seam geometry will be performed to support analysis aimed at better understanding the drag reduction mechanism beyond existing knowledge of simple or regular roughness and trip geometries. This knowledge will in turn be leveraged for optimization of athlete skinsuits in regions where flow separation may be delayed for improving aerodynamic performance.