An application of the parabolic equation method to long-range propagation of wind turbine noise

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

This paper describes the initial development of the parabolic equation (PE) method for the long-range propagation of wind turbine noise. The PE method has been used extensively for underwater propagation, but to a lesser extent for atmospheric noise propagation. The PE method is attractive because it is efficient computationally. In this paper the Crank-Nicholson Parabolic Equation (CNPE) is used to solve the PE equation numerically although the Green's Function Parabolic Equation (GFPE) method is discussed. The CNPE method is demonstrated for axisymmetric noise propagation in both homogeneous and inhomogeneous atmospheres. In order to reduce the total computational time further, an adjoint or reciprocal version of the CNPE method has been developed. The effects of irregular and absorbing terrain are modeled through the use of the Impedance Mismatch Method (IMM), which has been applied to the PE method for the first time. This technique replaces the actual irregular surface with a region of different acoustic properties. This greatly simplifies the modeling of complex terrain because the computation grid does not have to be "fitted" to the ground. Example computations are presented.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference
Pages450-465
Number of pages16
Volume1
StatePublished - 2005
EventCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference - Monterey, CA, United States
Duration: Mar 23 2005Mar 25 2005

Other

OtherCollection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference
CountryUnited States
CityMonterey, CA
Period3/23/053/25/05

Fingerprint

Wind turbines
Acoustic properties
Green's function

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Cheng, R., Morris, P. J., & Brentner, K. S. (2005). An application of the parabolic equation method to long-range propagation of wind turbine noise. In Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference (Vol. 1, pp. 450-465)
Cheng, Rui ; Morris, Philip John ; Brentner, Kenneth Steven. / An application of the parabolic equation method to long-range propagation of wind turbine noise. Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference. Vol. 1 2005. pp. 450-465
@inproceedings{b079dc55f2e84650b254ef21603cce21,
title = "An application of the parabolic equation method to long-range propagation of wind turbine noise",
abstract = "This paper describes the initial development of the parabolic equation (PE) method for the long-range propagation of wind turbine noise. The PE method has been used extensively for underwater propagation, but to a lesser extent for atmospheric noise propagation. The PE method is attractive because it is efficient computationally. In this paper the Crank-Nicholson Parabolic Equation (CNPE) is used to solve the PE equation numerically although the Green's Function Parabolic Equation (GFPE) method is discussed. The CNPE method is demonstrated for axisymmetric noise propagation in both homogeneous and inhomogeneous atmospheres. In order to reduce the total computational time further, an adjoint or reciprocal version of the CNPE method has been developed. The effects of irregular and absorbing terrain are modeled through the use of the Impedance Mismatch Method (IMM), which has been applied to the PE method for the first time. This technique replaces the actual irregular surface with a region of different acoustic properties. This greatly simplifies the modeling of complex terrain because the computation grid does not have to be {"}fitted{"} to the ground. Example computations are presented.",
author = "Rui Cheng and Morris, {Philip John} and Brentner, {Kenneth Steven}",
year = "2005",
language = "English (US)",
isbn = "1563477300",
volume = "1",
pages = "450--465",
booktitle = "Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference",

}

Cheng, R, Morris, PJ & Brentner, KS 2005, An application of the parabolic equation method to long-range propagation of wind turbine noise. in Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference. vol. 1, pp. 450-465, Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference, Monterey, CA, United States, 3/23/05.

An application of the parabolic equation method to long-range propagation of wind turbine noise. / Cheng, Rui; Morris, Philip John; Brentner, Kenneth Steven.

Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference. Vol. 1 2005. p. 450-465.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - An application of the parabolic equation method to long-range propagation of wind turbine noise

AU - Cheng, Rui

AU - Morris, Philip John

AU - Brentner, Kenneth Steven

PY - 2005

Y1 - 2005

N2 - This paper describes the initial development of the parabolic equation (PE) method for the long-range propagation of wind turbine noise. The PE method has been used extensively for underwater propagation, but to a lesser extent for atmospheric noise propagation. The PE method is attractive because it is efficient computationally. In this paper the Crank-Nicholson Parabolic Equation (CNPE) is used to solve the PE equation numerically although the Green's Function Parabolic Equation (GFPE) method is discussed. The CNPE method is demonstrated for axisymmetric noise propagation in both homogeneous and inhomogeneous atmospheres. In order to reduce the total computational time further, an adjoint or reciprocal version of the CNPE method has been developed. The effects of irregular and absorbing terrain are modeled through the use of the Impedance Mismatch Method (IMM), which has been applied to the PE method for the first time. This technique replaces the actual irregular surface with a region of different acoustic properties. This greatly simplifies the modeling of complex terrain because the computation grid does not have to be "fitted" to the ground. Example computations are presented.

AB - This paper describes the initial development of the parabolic equation (PE) method for the long-range propagation of wind turbine noise. The PE method has been used extensively for underwater propagation, but to a lesser extent for atmospheric noise propagation. The PE method is attractive because it is efficient computationally. In this paper the Crank-Nicholson Parabolic Equation (CNPE) is used to solve the PE equation numerically although the Green's Function Parabolic Equation (GFPE) method is discussed. The CNPE method is demonstrated for axisymmetric noise propagation in both homogeneous and inhomogeneous atmospheres. In order to reduce the total computational time further, an adjoint or reciprocal version of the CNPE method has been developed. The effects of irregular and absorbing terrain are modeled through the use of the Impedance Mismatch Method (IMM), which has been applied to the PE method for the first time. This technique replaces the actual irregular surface with a region of different acoustic properties. This greatly simplifies the modeling of complex terrain because the computation grid does not have to be "fitted" to the ground. Example computations are presented.

UR - http://www.scopus.com/inward/record.url?scp=29244437564&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=29244437564&partnerID=8YFLogxK

M3 - Conference contribution

SN - 1563477300

SN - 9781563477300

VL - 1

SP - 450

EP - 465

BT - Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference

ER -

Cheng R, Morris PJ, Brentner KS. An application of the parabolic equation method to long-range propagation of wind turbine noise. In Collection of Technical Papers - 11th AIAA/CEAS Aeroacoustics Conference. Vol. 1. 2005. p. 450-465