| 一种螺旋桨的气动声学设计与实验验证 |
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| 引用本文： | 李晓东,孙晓峰,胡宗安.一种螺旋桨的气动声学设计与实验验证[J].航空动力学报,1991,6(4):317-319,375. |
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| 作者姓名： | 李晓东 孙晓峰 胡宗安 |
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| 作者单位： | 北航螺旋桨研究发展中心 |
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| 摘 要： | 就螺桨而言 ,其性能优劣的主要标志是高效率与低噪声 ,而以螺桨推进的飞机 ,螺桨为主要噪声源 ,为满足 CAAR36及 FAA36等国内外有关航空声学适航条例 ,要求在设计阶段就能准确地预测远场噪声特性 ,另一方面 ,从旅客舒适性角度考虑 ,以及从结构完整性和安全性角度考虑 (即防止声疲劳 ) ,则要求能准确地预测近场噪声。这样 ,在当代螺旋桨设计体系中包括螺旋桨声学设计子系统是完全必要的。本文针对某螺旋桨 ,从声学设计子系统角度出发讨论如何对其进行改型设计 ,主要技术指标要求在桨叶数、轮毂不变而只允许改变桨叶形状和直径条件下 ,大幅…
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AEROACOUSTICAL MODIFICATION OF A PROPELLER |
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| Li Xiaodong,Yang Xiaodong and Hu Zongan.AEROACOUSTICAL MODIFICATION OF A PROPELLER[J].Journal of Aerospace Power,1991,6(4):317-319,375. |
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| Authors: | Li Xiaodong Yang Xiaodong and Hu Zongan |
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| Institution: | APRDC,BUAA;APRDC,BUAA;APRDC,BUAA |
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| Abstract: | An aeroacoustical modification of a propeller is considered with the aim of great enhancement of its takeoff efficioncy and appropriate cutdown of its noise level when its blade number,blade hub and cruise efficiency are kept unchanged.A time domain method is applied to predicting near and far the sound field.From iterative aeroacoustical and aerodynamical optimization an optimum design scheme has been obtained.And two 1/3 scaled model propellers were made to simulate the original and modified propellers respectively.The results of comparative ground experiments show that the OASPL(Overall Sound Pressure Level)decreases by 1 to 1 5 dB while other technical spesifications are met. |
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