Study of Noise Control from an Industrial Jet

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (8) : 106-108.

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Study of Noise Control from an Industrial Jet

Huanglei Jiang Weikang Yan Weihua Ma Jianping

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Abstract

On controlling the jet noise, the most effective way is to reduce the noise aiming at the acoustic sound source. Based on the principle of the producing of jet noise, this paper theoretically analyzes the influence of the nozzle’s shape on the noise. Properly changing the shape of the nozzle can reduce the velocity of flow along the jet’s axis direction on the vertical grads, and thus weaken the intensity of the turbulence which results in the reduction of the jet noise. Numerical computation indicates that the improved nozzle could obviously reduce the velocity of the flow field. The experiment verifies that the jet noise can be effectively inhibited by changing the flow field, and the sound level can be reduced by 3~4 dB (A).

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jet noise / jet flow field / turbulence / noise control

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Huanglei Jiang Weikang Yan Weihua Ma Jianping . Study of Noise Control from an Industrial Jet[J]. Journal of Vibration and Shock, 2009, 28(8): 106-108