Stationary Wavelet Transform Based Analysis and Simulation of Unsteady Gust

您当前的位置：

首页 >

文章列表页 >

Stationary Wavelet Transform Based Analysis and Simulation of Unsteady Gust

更新时间：2025-07-09

- Stationary Wavelet Transform Based Analysis and Simulation of Unsteady Gust
- Vol. 43, Issue 7, Pages: 74-78(2009)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： X169;O357.5
- Online First：10 July 2009，
  
  Published：2009
- 稿件说明：
移动端阅览
Stationary Wavelet Transform Based Analysis and Simulation of Unsteady Gust[J]. 2009, 43(7): 74-78.
DOI：

Stationary Wavelet Transform Based Analysis and Simulation of Unsteady Gust[J]. 2009, 43(7): 74-78. DOI：

摘要

在塔克拉玛干沙漠风沙环境中进行野外风场定位观测

得到了具有典型非定常特征的输沙阵风.引入静态小波变换分析了阵风小波系数的非高斯分布特征和时间演化规律

针对其时频特征

推导出各尺度小波系数与目标风速谱的能量关系

采用反映湍流间歇性的Log-Poisson级串模型辅助生成小波系数

建立了基于静态小波逆变换的非定常阵风人工生成方法

并可通过调节低频段系数生成任意非定常波动规律.结果表明:自然阵风与Karman风速谱吻合良好

在惯性子区符合湍流-5/3定律

且具有明显的间歇性和局部自相似性; 基于静态小波逆变换法实例模拟人工风速序列

具有与自然阵风类似的湍流统计特征

证实了该方法的有效性.

Abstract

The field measurements were conducted to obtain the unsteady gust with blowing sand in the Taklimakan desert. The stationary wavelet transform is applied to investigate the non-Gaussian distribution characteristics and the temporal evolution of the gust wavelet coefficients. According to the time-frequency characteristics of the signal

the relationship between the wavelet at each scale and the target power spectrum is derived and the Log-Poisson law describing the intermittency of turbulence is employed to yield the wavelet coefficients. A method using the inverse stationary wavelet transform is proposed to generate artificial unsteady gust. Moreover

it is considered that the unsteady fluctuation depends on the wavelet coefficient at the lower frequency section. The results show that the power spectrum of the field gust is in good agreement with the Karman power spectrum and the inertial subrange of-5/3 power law is observed. The gust in the near-surface layer exhibits clearly the intermittency and local self-similarity of turbulence. In addition

the statistic analysis of a simulated example using the inverse stationary wavelet transform and its comparison with natural gust show the validity of the present method.

关键词

Keywords

references

SCHO¨NFELDT H J, VON LO¨WIS S. Turbulence-driven saltation in the atmospheric surface layer [J]. Meteorologische Zeitschrift, 2003, 12(5): 257-268.

LEENDERS J K, VAN BOXEL J H, STERK G. Wind forces and related saltation transport [J]. Geomorphology, 2005, 71(3/4): 357-372.

NEUMAN C M, LANCASTER N, NICKLING W G. The effect of unsteady winds on sediment transport on the stoss slope of a transverse dune, Silver Peak, NV, USA [J]. Sedimentology, 2000, 47(1): 211-226.

DAVIDSON-ARNOTT R G D, MACQUARRIE K, AAGAARD T. The effect of wind gusts, moisture content and fetch length on sand transport on a beach [J]. Geomorphology, 2005, 68(1/2): 115-129.

BUTTERFIELD G R. Transitional behaviour of saltation: wind tunnel observations of unsteady winds [J]. Journal of Arid Environments, 1998, 39(3): 377-394.

SPIES P J, MCEWAN I K, BUTTERFIELD G R. One-dimensional transitional behaviour in saltation [J]. Earth Surface Processes and Landforms, 2000, 25(5): 505-518.

RASMUSSEN K R, SØRENSEN M. Aeolian mass transport near the saltation threshold [J]. Earth Surface Processes and Landforms, 1999, 24(5): 413-422.

NASON G P, SILVERMAN B W. The stationary wavelet transform and some statistical applications [M]∥Lecture Notes in Statistics. Berlin, Germany: Springer-Verlag, 1995: 281-299.

MORFIADAKIS E E, GLINOU G L, KOULOUVARI M J. The suitability of the von Karman spectrum for the structure of turbulence in a complex terrain wind farm [J]. Journal of Wind Engineering and Industrial Aerodynamics, 1996, 62(2): 237-257.

SHE Zhensu, WAYMIRE E C. Quantized energy cascade and log-Poisson statistics in fully developed turbulence [J]. Physical Review Letters, 1995, 74(2): 262-265.

YAMADA M, OHKITANI K. Orthonormal wavelet analysis of turbulence [J]. Fluid Dynamics Research, 1991, 8(1/4): 101-115.

平板微通道壁面粗糙度对流场影响的摄动分析.西安交通大学学报,2005,39(5):540-543.

基于小波变换的扩散滤波模型数值解的收敛性.西安交通大学学报,2009,43(4):121-124.

微通道内流的微尺度粒子图像测速技术实验研究.西安交通大学学报,2007,41(11):1355-1359.

风沙流中沙粒相输移的测量.西安交通大学学报,2006,40(7):846-850.

粗糙元特征对风洞中大气表面层模拟的影响.西安交通大学学报,2009,43(3):87-91.

微通道中极性流体流动特性的研究.西安交通大学学报,2007,41(3):274-278.

双拉格朗日模型模拟气固两相双圆柱绕流.西安交通大学学报,2009,43(1):77-80.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Optimization of Flow and Heat Transfer Performance for Double-Rim Squealer Tip in Gas Turbines

Analysis of Turbulent Reynolds Stresses in Rotating Square Duct along Its Spanwise Direction

Clocking Effect under Different Inlet Guide Vanes Prewhirl Angles in a Centrifugal Compressor

Second-Order Moment Two-Phase Turbulence Model Considering Particle Wake Effect

Numerical Simulation of Heat-Moisture Barrier Performance of a Horizontal Air Curtain in Cold Storage

Related Author

YAN Xin

HE Kun

LI Haoyu

YAN Xin

HE Kun

LI Haoyu

马良栋 1

Related Institution

School of Energy and Power Engineering，Xi’an Jiaotong University

School of Energy and Power Engineering, Xi’an Jiaotong University

School of Civil and Hydraulic Engineering, Dalian University of Technology

School of Energy, Xi'an University of Science and Technology

Aeronautic and Mechanical Engineering college, Nanchang Hangkong University

⁰