技术中心

【英文篇名】 Application of wavelet transform to turbulence characteristic study of airflow in building environment 【作者中文名】 陈晓春; 李宏军; 欧阳沁; 朱颖心; 【作者英文名】 By Chen Xiaochun★; Li Hongjun; Ouyang Qin and Zhu Yingxin★Tsinghua University; Beijing; China; 【作者单位】 清华大学; 【文献出处】 暖通空调, Heating Ventilating 湍流特性; 建筑环境; 傅里叶变换; 【英文关键词】 wavelet transform; turbulence characteristic; building environment; Fourier transform; 【摘要】 介绍了小波变换的原理,通过对建筑周边自然风和轴流风机自由射流的小波分析研究,表明这种方法在分析气流湍动特性时具有优越性。小波分析方法与基于傅里叶变换的频谱分析方法结合使用可以形成互补。 【英文摘要】 Presents the theory of wavelet transform. Based on this method, studies natural wind and mechanical wind from free jet of axial fan. The results show that this method is ascendant in analysing turbulence characteristics of airflow. Wavelet transform associated with frequency spectrum analysis based on Fourier transform may facilitate each other. 【基金】 国家自然科学基金项目(编号50278044,50478008)资助