Installation Effects of a Propeller Mounted on aHigh-Lift Wing with a Coanda Flap. Part I:Aeroacoustic Experiments

Installation Effects of a Propeller Mounted on aHigh-Lift Wing with a Coanda Flap. Part I:Aeroacoustic Experiments
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安装在带有附壁襟翼的高升力机翼上的螺旋桨的安装效果。

DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Daniela Almoneit
Daniela Almoneit
中科院分区：
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文献类型：
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作者：
R. Akkermans;M. Pott;H. Buchholz;J. Delfs;Daniela Almoneit

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在这篇文章中，我们提出了有关螺旋桨安装效果的气动声学实验。这样的安装效果是重要的，因为与孤立的螺旋桨相比，它们可以显著地改变声辐射。为此，在布伦瑞克，德国的NWB航空声学风洞中进行了详细的实验。所考虑的几何形状是一个九叶螺旋桨安装在前面的高升力 机翼（采用柯恩达襟翼）。结果表明，螺旋桨转速、桨距角、风洞速度和攻角的变化对声辐射的影响。此外，与源定位技术的洞察力是在占主导地位的声源，并揭示了周期性的重要性，以及宽带噪声所考虑的几何形状。
In this contribution, we present aeroacoustic experiments concerning installation effects of propellers. Such installation effects are important as they can significantly alter the sound radiation as compared to an isolated propeller. For this purpose, detailed experiments have been conducted in the NWB aeroacoustic wind tunnel in Braunschweig, Germany. The considered geometry is a nine-bladed propeller installed in front of a high-lift wing (employing a Coanda flap). The results illustrate the influence of propeller rotational speed, blade pitch angle, wind tunnel velocity, and angle of attack variations on the sound radiation. Furthermore, with a source localisation technique insight is gained in the dominant sound sources, and reveals the importance of periodic as well as broadband noise for the considered geometry.