Numazu College of Technology Department of Digital Engineering
Toyohashi University of Technology Department of Mechanical Engineering
Toyohashi University of Technology Department of Mechanical Engineering
出版者
宇宙航空研究開発機構
出版者（英）
Japan Aerospace Exploration Agency (JAXA)
雑誌名
宇宙航空研究開発機構特別資料: 境界層遷移の解明と制御研究会講演論文集 第33回・第34回
雑誌名(英)
JAXA Special Publication: Proceedings of the 33rd and 34th JAXA Workshops on Investigation and Control of Boundary-Layer Transition
巻
JAXA-SP-04-002
ページ
11 - 12
発行年
2005-01-28
抄録（英）
This study aims to clarify the relation between the occurrence of counter-gradient heat flux and the spatial structure of internal gravity waves in a strongly stably-stratified mixing layer. Multi-point simultaneous measurement of temperature and velocity field was conducted by a rake of 7 cold- and hot-wires. The aspect of streamwise change in temperature spectrum showed that the internal gravity waves with fundamental frequencies of 1.2, 1.8, 3.0 Hz developed in the mixing layer and suddenly collapsed in the downstream region. As the amplitude of the waves increased downstream, coherence became larger among the temperature signals given by the cold-wire rake. When the internal gravity waves broke down at their wave front, counter-gradient heat flux occurred through the nonlinear interaction among the fundamental frequencies and their higher harmonics.
強安定混合層中に発達した内部重力波の空間計測
47776004.pdf
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