基于BWI辐射效率的低气动噪声共轴对转螺旋桨的设计研究
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吕昌昊,男,博士。主要研究方向:螺旋桨气动噪声机理及降噪研究。E-mail:by1705169@buaa.edu.cn

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V211.7

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国家自然科学基金(12072016, 11772033, 1217021666 和 11721202)


Low noise counter rotating propellers design based on BWI radiation efficiency
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    摘要:

    将共轴对转螺旋桨气动噪声快速预测理论与气动载荷快速预测方法相结合,对共轴对转螺旋桨远场气动噪声进行预测。分析了BWI辐射效率对共轴对转螺旋桨BWI干扰噪声的主控影响。对从低至高的(单排6-12)前后等桨叶数对转桨进行了研究。结果表明虽然低桨叶数与高桨叶数对转桨的气动噪声特性不同,但是总体上前后指向性的高声压区仍然是由BWI噪声控制。同时等桨叶数的设计只是使高声压区更集中,却无法对其进行降低。随后,对比了不同桨叶数共轴对转螺旋桨远场气动噪声的表现,认为不等桨叶数对转桨气动噪声普遍优于等桨叶数情况。得出了总桨叶数相同情况下对转桨前后桨叶数的搭配方案。对近场噪声高精预测方法将在未来的研究中对辐射效率的具体机理进行研究。

    Abstract:

    In this paper, the far-field aerodynamic noise of coaxial counter rotating propeller was predicted by combining the rapid prediction theory of aerodynamic noise and the rapid prediction method of aerodynamic load. The influence of BWI radiation efficiency on the main control of BWI interference noise of coaxial counter rotating propeller was analyzed. The counter rotating propeller with equal number of front and rear blades from low to high (single row 6-12) was studied. The results show that although the aerodynamic noise characteristics are different between low blade number and high blade number, the high sound pressure region at front and behind region is still dominated by BWI noise. At the same time, the design of equal blades number only makes the high sound pressure region more concentrated, but it can not be reduced. It is considered that non-equal blade number CRPs have better acoustics performance than equal one after the comparison between several non-equal configurations. The matching scheme is obtained for the number of blades before and after CRPs with same total blade numbers. High accuracy method will be used to study the nearfield acoustic in the future to get more characteristic of radiation efficiency.

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吕昌昊,胡天翔,孙韬,等.基于BWI辐射效率的低气动噪声共轴对转螺旋桨的设计研究[J].民用飞机设计与研 究,2022(1):83-89LYU Changhao, HU Tianxiang, SUN Tao, et al. Low noise counter rotating propellers design based on BWI radiation efficiency[J]. Civil Aircraft Design and Research,2022,(1):83-89. ( in Chinese)

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  • 在线发布日期: 2022-04-17
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