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基于DFT的水射流红外热像频域时空分析

宫伟力 赵海燕 安里千 毛灵涛

宫伟力, 赵海燕, 安里千, 等 . 基于DFT的水射流红外热像频域时空分析[J]. 北京航空航天大学学报, 2008, 34(06): 690-694.
引用本文: 宫伟力, 赵海燕, 安里千, 等 . 基于DFT的水射流红外热像频域时空分析[J]. 北京航空航天大学学报, 2008, 34(06): 690-694.
Gong Weili, Zhao Haiyan, An Liqian, et al. Temporal and spatial analysis of infrared images from water jet in frequency domain based on DFT[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(06): 690-694. (in Chinese)
Citation: Gong Weili, Zhao Haiyan, An Liqian, et al. Temporal and spatial analysis of infrared images from water jet in frequency domain based on DFT[J]. Journal of Beijing University of Aeronautics and Astronautics, 2008, 34(06): 690-694. (in Chinese)

基于DFT的水射流红外热像频域时空分析

基金项目: 国家重点基础研究发展规划(973)资助项目(2002CB412700)
详细信息
    作者简介:

    宫伟力(1955-),男,辽宁本溪人,副教授, gwl@cumtb.edu.cn.

  • 中图分类号: TD 921.5

Temporal and spatial analysis of infrared images from water jet in frequency domain based on DFT

  • 摘要: 基于二维离散傅里叶变换及空间频谱分析,对水射流湍流脉动的空间尺度进行了研究,得到了由红外辐射温度表征的被动标量湍流场在对流区、耗散区、惯性子区的特征空间尺度及其时间演化规律.对射流不同区域的关心点重新采样,得到湍流场中关心点的时间序列,利用一维离散傅里叶变换,分析了对流区大尺度涡中心、惯性子区小尺度涡中心、耗散区及射流轴心线上各关心点的湍流波动特征.计算了时间序列频谱的分形维数,研究了自由湍流不同尺度区间上述各关心点湍流脉动的分形特征.

     

  • [1] 李国华,吴立新,吴淼,等.红外热像技术及其应用的研究进展[J].红外与激光工程,2004,33(3):227-230 Li Guohua, Wu Lixin, Wu Miao, et al. Current status and applications of infrared thermo graphy [J]. Infrared and Laser Engineering, 2004,33(3):227-230(in Chinese) [2] Bouchardy A M. Processing of infrared thermal image for aerodynamic research [J]. Applications of Digital Image Processing, 1983, 397:304-309 [3] Cehlin M, Moshfegh B, Sandberg M. Measurements of air temperatures close to a low-velocity diffuser in displacement ventilation using an infrared camera [J]. Energy and Buildings, 2002, 34:687-698 [4] Turner J S. Turbulent entrainment:the development of the entrainment assumption and its application to geophysical flows [J]. Fluid Mechanics, 1986, 373:431-471 [5] Hamzah M A, Lin Mengshi, Anna G C. Fourier transform infrared spectroscopy, detection and identification of Escherichia coli O157:H7 and Alicyclobacillus strains in apple juice [J]. International Journal of Food Microbiology, 2006, 111:73-80 [6] Patterson B M, Danielson N D, Sommer A J. Polymer mediated capillary electrophoresis with attenuated total reflectance infrared microspectroscopy detection[J]. Analytica Chimica Acts, 2007, 583:231-238 [7] William K P.数字图像处理[M]. 邓鲁华,张延恒,译.北京:机械工业出版社,2005 William K P. Digital image processing [M]. Translated by Deng Luhua, Zhang Yanheng. Beijing:China Machine Press, 2005(in Chinese) [8] 张兆顺,崔桂香,许春晓. 湍流理论与模拟[M]. 北京:清华大学出版社,2005 Zhang Zhaoshun, Cui Guixiang, Xu Chunxiao. Theory and modeling of turbulence [M]. Beijing:Tsinghua University Press, 2005 (in Chinese) [9] 肯尼思·法尔科内. 分形几何——数学基础及其应用[M]. 曾文曲,译.沈阳:东北大学出版社,2001:57-58 Falconer K J. Mathematical foundations and applications [M]. Translated by Zeng Wenqu. Shenyang:Northeast University Press, 2001:57-58 (in Chinese)
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出版历程
  • 收稿日期:  2007-05-14
  • 网络出版日期:  2008-06-30

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