Bixler Barry, Pease David, Fairhurst Fiona
Honeywell Aerospace, Phoenix, AZ 85226, USA.
Sports Biomech. 2007 Jan;6(1):81-98. doi: 10.1080/14763140601058581.
The aim of this study was to build an accurate computer-based model to study the water flow and drag force characteristics around and acting upon the human body while in a submerged streamlined position. Comparisons of total drag force were performed between an actual swimmer, a virtual computational fluid dynamics (CFD) model of the swimmer, and an actual mannequin based on the virtual model. Drag forces were determined for velocities between 1.5 m/s and 2.25 m/s (representative of the velocities demonstrated in elite competition). The drag forces calculated from the virtual model using CFD were found to be within 4% of the experimentally determined values for the mannequin. The mannequin drag was found to be 18% less than the drag of the swimmer at each velocity examined. This study has determined the accuracy of using CFD for the analysis of the hydrodynamics of swimming and has allowed for the improved understanding of the relative contributions of various forms of drag to the total drag force experienced by submerged swimmers.
本研究的目的是建立一个精确的基于计算机的模型，以研究人体处于水下流线型姿势时其周围的水流以及作用于人体的阻力特性。对实际游泳者、该游泳者的虚拟计算流体动力学（CFD）模型以及基于虚拟模型的实际人体模型之间的总阻力进行了比较。测定了1.5米/秒至2.25米/秒速度范围内的阻力（这代表了精英比赛中展示的速度）。发现使用CFD从虚拟模型计算出的阻力与人体模型实验测定值的误差在4%以内。发现在所检测的每个速度下，人体模型的阻力比游泳者的阻力小18%。本研究确定了使用CFD分析游泳流体动力学的准确性，并有助于更好地理解各种形式的阻力对水下游泳者所受总阻力的相对贡献。
