Radiation characteristics of noise generated from a wind turbine

被引：5

作者：

Okada, Yasuaki ^{[1
]}

Yoshihisa, Koichi ^{[1
]}

Higashi, Kazuki ^{[2
]}

Nishimura, Naoto ^{[3
]}

机构：

[1] Meijo Univ, Fac Sci & Technol, Tempaku Ku, 1-501 Shiogamaguchi, Nagoya, Aichi 4688502, Japan

[2] Japan Weather Assoc, Toshima Ku, Tokyo 1706055, Japan

[3] Kansai Elect Power Co Ltd, Energy Use R&D Ctr, Amagasaki, Hyogo 6610974, Japan

来源：

ACOUSTICAL SCIENCE AND TECHNOLOGY | 2015年 / 36卷 / 05期

关键词：

Wind turbine noise; Sound directivity; Output power; Rotor rotational speed; Noise propagation;

D O I：

10.1250/ast.36.419

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

In Japan, the development of large-scale wind power generation facilities has been promoted since about 2000. Nationwide investigations of the acoustic characteristics of wind turbine noise have been conducted at various wind farms. In this study, to examine the horizontal and vertical radiation characteristics of noise generated from wind turbines, field measurements of noise from a single wind turbine with a rated power of 1.5MW have been performed. Some receiving points were set circularly around the wind turbine and mounted on a nearby lightning tower. Meteorological and associated wind turbine operational data were collected at 1 s intervals along with corresponding acoustic data. In addition, the sound pressure level distributions at distances of 50m to 200m from the wind turbine were investigated. Results revealed distinguishable horizontal directivity of wind turbine noise. The A-weighted sound pressure levels in the crosswind direction are almost 5 dB lower than those in the up- and downwind directions. Furthermore, it has been found that the sound directivity around the wind turbine could be expressed by a simple empirical formula, assuming the wind turbine to be a point source with combined bi- and omnidirectional patterns.

引用

页码：419 / 427

页数：9

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