Open rotor interaction noise reduction through front rotor wake modification
Open rotor interaction noise reduction through front rotor wake modification
复制标题
通过前旋翼尾流修改降低开式旋翼相互作用噪音
DOI：
10.1177/1475472x16643461
复制
发表时间：
2016
影响因子：
1
通讯作者：
L. Jacquin
中科院分区：
文献类型：
--
作者：
G. Delattre;F. Falissard;L. Vion;L. Jacquin
在反向旋转的开放式旋翼的前叶片的前缘上放置单个优化的凸块被设想为被动装置，以减少在低速和大推力条件下（例如起飞）的干扰噪声。该降噪装置可作为后叶片修剪及其对巡航条件下效率的不利影响的替代方案。修改后的前旋翼叶片提供了与前旋翼尾流特性变化相关的声学增益。前桨叶改型对起飞和巡航工况的气动性能影响不大。
The use of a single optimized bump placed on the leading edge of the front blade of a counter rotating open rotor is envisaged as passive device to reduce the interaction noise at low-speed and high-thrust condition, such as takeoff. This noise reduction device is to be considered as an alternative to rear blade cropping and its penalizing effect on efficiency in cruise condition. The modified front rotor blades provide an acoustic gain that has been linked to the changes on the characteristics of the front rotor wake. The front blade modification has no strong impact on the aerodynamic performance for both takeoff and cruise operating points.