@inproceedings{oai:jaxa.repo.nii.ac.jp:00006474, author = {溝渕, 泰寛 and 新城, 淳史 and 小川, 哲 and Mizobuchi, Yasuhiro and Shinjo, Junji and Ogawa, Satoru}, book = {宇宙航空研究開発機構特別資料: 航空宇宙数値シミュレーション技術シンポジウム2004論文集, JAXA Special Publication: Proceedings of Aerospace Numerical Simulation Symposium 2004}, month = {Mar}, note = {A hydrogen jet lifted flame is numerically simulated by DNS (Direct Numerical Simulation) approach using CeNSS (Central Numerical Simulation System) at JAXA. A detailed chemistry and rigorous transport properties are used. A hugely massive simulation with about 200 million grid points is conducted to see the dependency of the flame structure on the grid density comparing with the previous simulation with 23 million grid points. The present simulation reproduces almost the same flame global structure as obtained by the previous one, telling that the lifted flame consists of three elements, leading edge flame, inner rich premixed flame, outer diffusion flame islands, although improvement of resolution is observed in some locations, and indicates that the data obtained with the resolution of the previous simulation is worth analysis. A long-term simulation is conducted with 23 million grid points in order to look into the details of the phenomena of rather long time scales. The term is long enough to observe several fluctuations penetrating into the leading edge flame. The observation reveals two production (or amplification) processes of the outer diffusion flame islands. One is by the vigorously turbulent behavior of the inner rich premixed flame formed inside the lifted flame. The other takes place when a rather large perturbation penetrates into the leading edge flame. The later process is strongly related to the stabilization mechanism of the leading edge flame., 資料番号: AA0048469034, レポート番号: JAXA-SP-04-012}, pages = {202--207}, publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)}, title = {CeNSSを用いた水素噴流浮き上がり火炎詳細シミュレーション}, volume = {JAXA-SP-04-012}, year = {2005} }