面向大涵道比涡扇发动机的风扇纯音噪声经验预测模型  

Empirical prediction model of fan tone noise for high bypass ratio turbofan engine

作　　者：洪志亮 赵北星 李旦望 HONG Zhiliang;ZHAO Beixing;LI Danwang(College of Safety Science and Engineering,Civil Aviation University of China,Tianjin 300300,China;China Special Vehicle Research Institute,Jingmen 448035,China;AECC Commercial Aero Engine Co.,Ltd,Shanghai 201108,China)

机构地区：[1]中国民航大学安全科学与工程学院,天津300300 [2]中国特种飞行器研究所,湖北荆门448035 [3]中国航发商用航空发动机有限责任公司,上海201108

出　　处：《推进技术》2024年第6期90-99,共10页Journal of Propulsion Technology

基　　金：中央高校基本科研业务费(3122021087)。

摘　　要：随着涡扇发动机涵道比的不断提高,风扇噪声对于发动机总噪声的贡献量越来越大,因此准确地预测风扇噪声对发动机的降噪设计和适航符合性评估具有重要的意义。在现有风扇噪声半经验预测模型架构的基础上,利用某型号大涵道比涡扇发动机的噪声试验数据,适应性地发展了风扇纯音噪声预测模型,将预测模型中的转/静间距函数与叶片后掠角及工况相关联,并提出考虑不同工况影响的指向性函数,预测精度较现有模型有大幅提升。与试验数据的对比表明,本模型的预测误差在5 dB之内,验证了新开发模型的准确性。With the continuous improvement of the bypass ratio of turbofan engines,the contribution of fan noise to the total engine noise is increasing.Therefore,accurate prediction of fan noise is of great significance for low-noise engine design and airworthiness compliance assessment.Based on the existing semi-empirical prediction architecture of fan noise,a tone noise prediction model has been developed using measured data of a high bypass ratio turbofan engine.The model associates the rotor/stator spacing function with the vane sweep angle and operating conditions,and the directivity function is improved with various operating conditions.The prediction accuracy has been remarkably improved compared to existing models.Comparing with the experimental data,the prediction error is within 5 dB,illustrating the accuracy of the newly developed model.

关 键 词：航空器噪声适航审定 涡扇发动机 大涵道比 风扇噪声 噪声预测 经验模型 

分 类 号：V232.4[航空宇航科学与技术—航空宇航推进理论与工程]