浮式风电缩比实验一般采用传统的推力系数相似理论进行模型设计。模型机组可再现原型机组平均推力，但功率性能偏低，且动态气动相似性难以保证。本文提出一种基于最优叶尖速比映射关系的新型动态气动相似理论，并以NREL 5-MW 为原型机组，分别设计了传统理论和新理论下的两款模型机组。与传统模型机组相比，新模型机组除了满足推力系数相似，功率系数也可通过增加某常数与原型机组近似。纵荡–纵摇组合运动下的计算结果表明：相同的叶尖速比变化下，新模型机组的动态推力、动态功率及其系数与原型机组的相似性明显优于传统模型机组。本工作适用于风洞实验研究，可在一定程度上解决水池实验中模型机组气动性能不够准确的问题。

Traditional thrust coefficient similarity theory is generally used for modeling in scale experiments of floating offshore wind turbines. Model wind turbines can reproduce the average thrust of the prototype wind turbine, but the power performance is insufficient and the dynamic aerodynamic similarity is difficult to ensure. In this paper, a newly dynamic aerodynamic similarity theory based on the mapping of the optimal tip speed ratio is proposed, and two model wind turbines are designed respectively under the traditional and new theories using the NREL 5-MW prototype wind turbine. Compared with the traditional wind turbine, not only the thrust coefficient but also the power coefficient of the new wind turbine can be approximated with the prototype wind turbine by increasing a certain constant. Simulation results under combined surge-pitch motions show that the similarities of the dynamic thrust, power and their coefficients between the prototype and new wind turbines are significantly better than that between the prototype and traditional wind turbines in the same change in tip speed ratios. This work is more applicable to wind tunnel experimental studies, which can solve the problem of insufficiently accurate aerodynamics of model wind turbines in wave basin experiments to a certain extent.