摘要
本文统计分析了复杂地形近地面大量温度脉动功率谱，结果表明，在复杂地形情况下，不一定总能用Kolmgorov的湍流谱来描述，相当多的时间温度谱的幂率偏陡，在-5/3至-3之间，有时还会在惯性区出现两段-5/3幂率，其中频率高的一段强度更强。本文还讨论了偏离Kolmogorov的条件和原因。
A statistics of numerous temperature spectra measured in the surface layer overa complicated terrain was performed. it is shown that the power law of temperaturespectrum deviates from -5/3 and is -5/3 ～ -3 frequently. It is indefinite that thespectra of temperature can always be described by turbulent spectrum of Kolmogoroff. Ainertial range with two segments of -5/3 law can be found in a temperature spectrumsometimes and there is higher turbulent intensity with the segment of higher frequency.The condition and reason of deviating from Kolmogorov spectrum was discussed.
出处
《量子电子学报》
CAS
CSCD
1998年第2期134-139,共6页
Chinese Journal of Quantum Electronics
基金
国家高技术发展计划激光技术领域资助
