摘要
通过对非平衡态湍流边界层壁面脉动压力的数值模拟研究,建立有压力梯度下的湍流边界层壁面脉动压力数值模拟方法。通过对不同厚度分布的翼型表面的湍流边界层模拟,获得不同压力梯度模型的壁面脉动压力特征。采用湍流边界层参数对脉动压力频谱进行归一化处理,其频谱特征与试验结果吻合较好。对湍流壁面脉动压力的频率-波数谱进行分析,获得了显著的湍流传输特征。随着不同模型压力梯度的增加,在波数峰脊附近的谱级增加幅值为3 dB。此数值模拟方法可为复杂工况下的湍流边界层壁面脉动压力的数值研究提供技术支撑。
A numerical simulation method of turbulent boundary layer wall pulsation pressure with pressure gradient is established by studying the pressure fluctuation on the wall of non-equilibrium turbulent boundary layer.By simulating the turbulent boundary layer on the airfoil surface with different thickness distributions,the characteristics of wall fluctuating pressure in different pressure gradient models are obtained.The turbulent boundary layer parameters are used to normalize the spectrum of fluctuating pressure,and the spectrum characteristics are in good agreement with the experimental results.The frequency-wave number spectrum of fluctuating pressure on a turbulent wall is analyzed,and the significant characteristics of turbulent transmission are obtained.With the increase of pressure gradient in different models,the spectral level near the crest of wave number peak increases by 3 dB.The numerical simulation method in this paper can provide a technical support for the numerical study of the fluctuating pressure on the turbulent boundary layer wall under complex working conditions.
作者
舒礼伟
翟树成
SHU Li-wei;ZHAI Shu-cheng(Naval Major Projects Management Center,Beijing 100071,China;China Ship Scientific Research Center,National Key Laboratory on Ship Vibration and Noise,Wuxi 214082,China)
出处
《舰船科学技术》
北大核心
2022年第11期40-43,共4页
Ship Science and Technology
基金
国家自然科学基金资助项目(51706211)
国家自然科学基金资助项目(51706211)。
关键词
压力梯度
湍流边界层
湍流脉动压力
频率-波数谱
pressure gradient
turbulent boundary layer
turbulent pulsating pressure
frequency-wave number
