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首页> 外文期刊>International journal of aerospace engineering >A Novel Aerodynamic Noise Reduction Method Based on Improving Spanwise Blade Shape for Electric Propeller Aircraft
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A Novel Aerodynamic Noise Reduction Method Based on Improving Spanwise Blade Shape for Electric Propeller Aircraft

机译：基于改善电动螺旋桨飞机的枝条叶片形状的新型空气动力降噪方法

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摘要

Aiming at the problem of excessive propeller noise in a new type of electric aircraft, in order to ensure the propeller aerodynamic characteristics simultaneously, a noise reduction method for improving the shape of the blade along the spanwise is proposed. The FW-H model, the unsteady slip mesh, and the large eddy simulation method are investigated to obtain the aerodynamic noise spectrum. Initially, through propeller aerodynamic noise numerical simulation, we obtain the sound pressure and aircraft aerodynamic noise in frequency domain. Subsequently, the effectiveness of our method is verified by comparing the experimental data and numerical results. Based on the established calculation model and method, under three different rotation speeds, the distribution law of the sound pressure level of the propeller with different shapes along the spanwise is analyzed, and the influence of the blade shape on the aerodynamic noise of the propeller is obtained. The research shows that the aerodynamic noise of the new blade compared to the original blade is significantly reduced at the same rotation speed higher than 1000?rpm, indicating that the blade load noise plays a dominant role in the aerodynamic noise and can be effectively reduced by changing the blade shape along the spanwise, thus reducing the aerodynamic noise of the blade.
机译：针对一种新型电气飞机的螺旋桨噪声过度的问题，为了确保螺旋桨空气动力学特性同时，提出了一种用于改善沿翼展的叶片形状的降噪方法。研究了FW-H模型，不稳定的滑动网和大涡模拟方法，获得了空气动力学噪声谱。最初，通过螺旋桨空气动力学噪声数值模拟，我们获得频域中的声压和飞机空气动力学噪声。随后，通过比较实验数据和数值结果来验证我们的方法的有效性。基于所建立的计算模型和方法，在三种不同的旋转速度下，分析了沿跨度沿后的不同形状的螺旋桨声压水平的分布规律，并且叶片形状对螺旋桨的空气动力噪声的影响是获得。该研究表明，与原始刀片相比，新叶片的空气动力学噪声在高于1000°的旋转速度下显着降低，表明刀片负载噪声在空气动力学噪声中起着主导作用，并且可以有效地减少沿着翼展改变叶片形状，从而降低了刀片的空气动力学噪声。

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