Influence of Propeller Design Parameters on Far-Field Harmonic Noise in Forward Flight

Hanson, D. B.

doi:10.2514/3.50887

Cited by 97 publications

(38 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since the flow is irrotational, it is convenient to introduce a velocity potential <f> such that v= -V<J> (4) By Eq. (2) the velocity potential is related to the pressure perturbation by = po ---+ Moo ---dt dz (5) Upon eliminating the other variables, it is straightforward to find that O satisfies the convective wave equation:…”

Section: Formulation Of the Propeller Noise Problemmentioning

confidence: 99%

Discretization errors inherent in finite difference solution of propeller noise problems

Tam

1992

AIAA Journal

View full text Add to dashboard Cite

Global errors arising from the use of a finite difference approximation to solve propeller noise problems are investigated. It is found that the calculated waveforms of the finite difference solutions are subjected to severe distortion due to dispersive effects. This is so even when the Fourier amplitudes of the different blade-passage harmonics of the acoustic disturbance of the propeller are adequately predicted. In addition, it is found that finite difference solutions can produce spurious acoustic radiation. The spurious radiation is a form of aliasing error. The relative intensity of the spurious acoustic radiation can become significant at high subsonic flight Mach number and at high subsonic blade-tip rotational Mach number. Also, the relative intensity is higher for the higher order blade-passage harmonics.

show abstract

Section: Formulation Of the Propeller Noise Problemmentioning

confidence: 99%

Discretization errors inherent in finite difference solution of propeller noise problems

Tam

1992

AIAA Journal

View full text Add to dashboard Cite

show abstract

“…Ffowcs Williams and Hawkings (1969) In the early 1970s, most noise prediction methods were in the frequency domain because timedomain methods generally require powerful computers. The analytic solutions were obtained for some significant problems by use of frequency domain analysis (Hanson, 1980a(Hanson, , 1980bZhu et al, 2000) by some approximation. In frequency domain analysis, the blade loading is often distributed on the nothickness surface instead of the true blade boundary surface, and some approximation is also made for the distance between the noise source and the observer.…”

Section: Introductionmentioning

confidence: 99%

Prediction of non-cavitation propeller noise in time domain

Xiong

Xiao

et al. 2011

China Ocean Eng

View full text Add to dashboard Cite

The blade frequency noise of non-cavitation propeller in a uniform flow is analyzed in time domain. The unsteady loading (dipole source) on the blade surface is calculated by a potential-based surface panel method. Then the timedependent pressure data is used as the input for Ffowcs Williams-Hawkings formulation to predict the acoustics pressure. The integration of noise source is performed over the true blade surface rather than the nothickness blade surface, and the effect of hub can be considered. The noise characteristics of the non-cavitation propeller and the numerical discretization forms are discussed.

show abstract

“…In early 1970s，most of people used frequency domain method to forecast the noise of propeller [3][4] ; In 1980s, Farass subtly transformed for FW-H equation and got integral representation in time domain [5][6][7] and provided the corresponding solution.The paper uses CFD method to calculate the wake field behind stern of all-appendage suboff,then predictthe unsteady pressure distribution of propeller surface using method of laminae based onvelocity potential. On this basis,this paper integrates distribution of the noise source on theblade surface directly in order to forecast the low-order frequency noise of the propeller.…”

Section: Introductionmentioning

confidence: 99%

Prediction of low-order blade frequency noise of submarine propeller based on surface panel method

Z¹

2016

Proceedings of the 2016 International Conference on Civil, Transportation and Environment

View full text Add to dashboard Cite

Abstract. The unsteady loading(dipole source) on the blade surface was calculated by a potential-based surface panel method. Then the time-dependent pressure data were used as the input for Ffowcs Williams-Hawkings formulation to predict the acoustics pressure. The blade frequency noise of submarine propeller can be calculated quickly by the method, which can provide a technology support for the noise evaluation and optimization of submarine propeller.

show abstract

Influence of Propeller Design Parameters on Far-Field Harmonic Noise in Forward Flight

Cited by 97 publications

References 1 publication

Discretization errors inherent in finite difference solution of propeller noise problems

Discretization errors inherent in finite difference solution of propeller noise problems

Prediction of non-cavitation propeller noise in time domain

Prediction of low-order blade frequency noise of submarine propeller based on surface panel method

Contact Info

Product

Resources

About