@inproceedings{oai:jaxa.repo.nii.ac.jp:00037247,
 author = {大庭, 勝久 and 蒔田, 秀治 and Oba, Katsuhisa and Makita, Hideharu},
 book = {航空宇宙技術研究所特別資料, Special Publication of National Aerospace Laboratory},
 month = {Jan},
 note = {30 Sep.-1 Oct. 1997 (21st). 26-27 Mar. 1998 (22nd), 30 Sep.-1 Oct. 1997 (21st). 26-27 Mar. 1998 (22nd), 温度成層形成装置によって形成した強安定成層混合層を横切る熱輸送に及ぼす内部重力波の影響について風洞測定を行った。速度および温度変動のエネルギー密度レベルはBrunt-Vaeisaelae周波数以下でかなり増加した。その時、1.0Hz、1.8Hz、2.8Hzの内部重力波は浮力の効果により自然発生的に発達した。この発達の初期段では、内部重力波は、混合層を横切る熱輸送にほとんど影響を与えず、減少勾配熱輸送が支配的であった。鉛直方向成分速度変動と温度変動の位相差は、内部重力波が発達するにつれて-π/2に近づいた。その時、鉛直方向熱輸送は、明らかに抑圧される。内部重力波は非線形干渉により崩壊し、下流領域で逆勾配熱流束がはっきりと観測された。その時、そのエネルギーは、より高い周波数の乱雑成分へ輸送される。, Wind tunnel measurements were conducted on the influence of internal gravity waves on heat transfer across a strongly stable stratified mixing layer generated by a thermal stratification generator. Energy density levels of velocity and temperature fluctuations remarkably increased below the Brunt-Vaeisaelae frequency where the internal gravity waves of 1.0 Hz, 1.8 Hz, 2.8 Hz spontaneously developed by the effect of buoyancy force. In the initial stage of the development, the internal gravity waves scarcely affected the heat transfer across the mixing layer and the down gradient heat transfer was dominant. Phase difference between vertical component of velocity and temperature fluctuation approached -pi/2 as the internal gravity waves developed. Then, the vertical heat transfer was apparently suppressed. The waves were broken down through their nonlinear interactions and the counter gradient heat flux was clearly observed in the downstream region. Then, their energy was transferred into random components of higher frequencies., 資料番号: AA0001655024, レポート番号: NAL SP-40},
 pages = {91--94},
 publisher = {航空宇宙技術研究所, National Aerospace Laboratory (NAL)},
 title = {強安定成層流中における非線形熱輸送},
 volume = {40},
 year = {1999}
}