流速对尾流激励的叶片气动力降阶模型的影响

Impact of Flow Speed on Aerodynamic Reduced Order Model for Blade to Upstream Wake

介绍了基于Volterra级数的尾流激励叶片气动力降阶模型,用于上游尾流激励下叶片气动载荷的快速计算。用一个叶片的算例验证了该降阶模型,通过不同流速的算例对比发现:该降阶模型可以快速准确地描述尾流激励引起的叶片气动力,流速或流场结构不是影响该气动力降阶模型精度的关键,而上游尾流扰动是否满足小扰动假设是保证该气动力降阶模型精确的关键。

A Volterra reduced order model(ROM)for blade to upstream wake is introduced to calculate blade aerodynamic forces due to upstream wake excitation.A blade example is used to verify the proposed ROM.By test cases of different maximum flow speeds,it is found that the proposed ROM can accurately describe the aerodynamic forces due to upstream wakes at all speed,only if the wake perturbation satisfy small perturbation requirement.