B122 遷移過程における内部重力波の空間計測

概要

論文の詳細を見る
Internal gravity wave was spontaneously generated in a strongly stably-stratified mixing layer by giving a large local temperature gradient exceeding 1000K/m. Multipoint simultaneous measurement of temperature field was conducted by a rake of 5 cold-wires and a multi-channel high-precision thermometer system. Frequency components of 0.95,2.05 and 3.0Hz were observed in the internal gravity wave in the mixing layer. The amplitude of the internal gravity wave was small in the initial stage of their streamwise development As the internal gravity wave developed downstream, the correlation among each channel was stronger and the amplitude of the wave rapidly increased. Internal gravity wave was collapsed through their nonlinear interactions in the downstream region and the energy of the wave motion was transferred into random components with frequencies higher than the B-V frequency.
日本流体力学会の論文
2002-07-23