均匀流场中螺旋桨线谱噪声的频域预报方法  

Frequency-domain method for predicting the tone of noise from a propeller operating in uniform flows

作　　者：谢剑波[1] 周其斗[1] 纪刚[1] 方斌[1] 

机构地区：[1]海军工程大学船舶与海洋工程系,湖北武汉430033

出　　处：《哈尔滨工程大学学报》2010年第5期585-588,共4页Journal of Harbin Engineering University

摘　　要：为研究均匀流场中的螺旋桨远场辐射线谱噪声,在Lighthill声类比理论和FfowcsWilliam-Hawkings方程的基础上,应用带有平均流效果的格林函数,建立了螺旋桨线谱噪声的频域预报理论,突破了现有理论需要假设薄机翼和必须在投影平面对声源进行积分的界限,允许在螺旋桨真实叶表面对声源进行积分.数值计算及与实验结果的比较表明,该频域方法是有效的,并且具有相当高的预报精度.对线谱噪声指向性分析表明,最大值与螺旋桨轴垂直,并且随频率增加主瓣宽度相应减小.This investigation examined the tone of noise from a propeller operating in uniform flows.On the basis of Lighthill＇s acoustic analogy and the Ffowcs William-Hawkings equation,a frequency-domain formulation for predicting far-field tone noise was proposed.Integration in the formula can be evaluated on the real blade surface rather than on a projected disk or the blade＇s mean-chord surface,as has been necessary previously.This avoids the commonly made assumption of flat plate geometry.Numerical calculation and experimental results showed that the frequency-domain formulation was quite effective.Tone noise directivity showed that the maximum value was located in a direction vertical to the propeller axis and the width of the main band decreased as frequency increased.

关 键 词：螺旋桨 线谱噪声 均匀流场 表面积分 

分 类 号：U664[交通运输工程—船舶及航道工程]