旋翼低噪声双掠桨尖优化设计方法研究

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• 英文论文题名：Optimization Design Method for Rotor Noise Reduction with Double-swept Blade
• 论文作者：董琦 ; 丁存伟 ; 陈宝 ; 周国成
• 英文论文作者：DONG Qi ; DING Cunwei ; CHEN Bao ; ZHOU Guocheng ; AVIC Aerodynamics Research Institute
• 年：2016
• 作者机构：中国航空工业哈尔滨空气动力研究所;
• 论文关键词：旋翼 ; 噪声抑制 ; 桨尖外形 ; 优化设计 ; 数值模拟
• 英文论文关键词：rotor ; blade-tip shape ; noise reduction ; optimization ; numerical simulation
• 会议召开时间：2016-11-04
• 会议录名称：2016年度全国气动声学学术会议论文摘要集
• 语种：中文
• 分类号：V275.1
• 学会代码：LTLX
• 会议名称：2016年度全国气动声学学术会议
• 会议地点：中国北京
• 主办单位：中国航空学会航空声学专业委员会、中国航空学会气动声学专业委员会、中国商飞上海飞机设计研究院、北京航空航天大学
• 学会名称：北京航空航天大学流体力学教育部重点实验室
• 页数：10
• 文件大小：1034k
• 原文格式：D
• 会议级别：全国

摘要

旋翼噪声是直升机最主要的噪声源,开展旋翼降噪技术研究具有重要意义。首先,采用遗传算法对旋翼桨叶气动布局进行降噪优化设计,为提高遗传算法的优化效率,采用Kriging模型来代替费时的数值模拟过程,并以气动性能为约束,噪声值最小为目标,进行旋翼桨尖的降噪优化设计,获得气动性能和声学性能俱佳的桨叶形状。然后,利用混合计算方法计算降噪优化设计出的优化桨叶和基准桨叶在悬停和前飞状态下的气动噪声,流场计算采用滑移网格方法,噪声计算采用FW-H方法,数值模拟结果显示优化后的桨叶气动外形可以在保证旋翼气动性能的同时降低旋翼气动噪声,降噪量约为1.9dB,表明了优化桨叶具有良好的降噪效果,验证了优化设计程序的有效性。
The rotor noise is the main noise source of helicopter and the research on rotor noise reduction is of great significance.The optimization of the blade shape to improve the acoustic and aerodynamic performances is based on the genetic algorithm.To improve the efficiency of GA, the Kriging model is selected, where the GA conducts the optimization based on the surrogate model rather than on the CFD analysis module.Under the constraint of aerodynamic performance, the value of the minimum acoustic pressure is set as the target of the optimization.And finally obtain the blade shape which has superb behavior on both aerodynamic and acoustic performance.The noise of the optimization blade and the reference blade in hover and forward flight are calculated by employing the hybrid computation method; that is, the flow field is computed using sliding mesh method and the noise is using the FW-H method.The result of numerical simulation indicates that the optimized blade has a good noise reduction effect about 1.9dB decrease which verifies the validity of the optimization code.

引文

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