Modeling Turbulence Seen by Multibladed Rotors for Predicting Rotorcraft Response with Three-Dimensional Wake
Modeling Turbulence Seen by Multibladed Rotors for Predicting Rotorcraft Response with Three-Dimensional Wake
复制标题
对多叶旋翼所见的湍流进行建模，以预测旋翼机的三维尾流响应
DOI：
10.4050/jahs.42.337
复制
发表时间：
1996
影响因子：
1.5
通讯作者：
G. Gaonkar
中科院分区：
文献类型：
--
作者：
Ying Y. Dang;S. Subramanian;G. Gaonkar
在时域（相关矩阵）和频-时域（谱密度矩阵）中开发了多叶片转子的连续输入矩阵，并将早期研究的湍流模型作为特例恢复。然后将该矩阵应用于具有一个和三个叶片执行扑动运动的孤立转子;使用具有3D有限状态尾流模型的线性翼型理论。预测了扑翼和桨毂剪切的二阶响应统计量。统计数据表明，虽然站到站的互相关对响应的影响可以忽略不计，但叶片到叶片的互相关和动态尾流的影响是明显的。此外，尾流建模与至少三个谐波是收敛的结果所需要的。（作者）
A turbulence-input matrix for multibladed rotors is developed in the time domain (correlation matrix) and in the frequency-time domain (spectral density matrix), and earlier-studied turbulence models are recovered as special cases. The matrix is then applied to isolated rotors with one and three blades executing flapping motion; a linear airfoil theory with a 3D finite-state wake model is used. The second-order response statistics of flapping and hub shear are predicted. The statistics show that while the station-to-station cross-correlation effects on response are negligible, the effects of blade-to-blade cross-correlation and dynamic wake are appreciable. Moreover, wake modeling with at least three harmonics is required for converged results. (Author)