The Prediction and Analysis of Helicopter Rotor Rotation Noise in Hover

Da Wei Liu; Pei Lin Huang; Jin Zu Ji

doi:10.4028/www.scientific.net/AMM.397-400.291

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 397-400The Prediction and Analysis of Helicopter Rotor...

The Prediction and Analysis of Helicopter Rotor Rotation Noise in Hover

Abstract:

A prediction program for analysis of helicopter rotor rotation noise was developed based on Farassat1A formulation. The acoustic prediction program was validated by the comparison with the WOPWOP program results in the literature.The loads input for the acoustic calculation are obtained from CFD calculation. The directional characteristic analysis was conducted by this program. Some calculations were conducted for evaluating the influence of rotor parameters including rotor speed , blade pitch ,and blade dihedral for the helicopter rotor rotation noise in hover. The results show that some proper changes of rotor parameters can bring benefit in thickness and loading noise of helicopter rotor. Several conductive conclusions were summarized for the helicopter rotor noise reduction.

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Periodical:

Applied Mechanics and Materials (Volumes 397-400)

Pages:

291-294

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.397-400.291

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Online since:

September 2013

Authors:

Da Wei Liu, Pei Lin Huang, Jin Zu Ji

Keywords:

Directivity, Farassate1A, FW-H Equation, Rotation Noise, WOPWOP

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References

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