@inproceedings{oai:jaxa.repo.nii.ac.jp:00006144,
 author = {新城, 淳史 and 松山, 新吾 and 溝渕, 泰寛 and 小川, 哲 and Shinjo, Junji and Matsuyama, Shingo and Mizobuchi, Yasuhiro 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2005論文集, JAXA Special Publication: Proceedings of Aerospace Numerical Simulation Symposium 2005},
 month = {Feb},
 note = {This study presents numerical simulation results of combustion dynamics in a lean premixed combustor. The combustor is a swirl-stabilized gas turbine model combustor installed at Aerospace Research Center (ARC), Japan Aerospace Exploration Agency (JAXA). The methane/air lean premixed gas is used at the preheated temperature of 700 K, pressure 1 atm and equivalence ratio 0.5. Without control, large pressure oscillations are observed in the combustor mostly with longitudinal acoustic modes. The basic mode is quarter-wave mode. The pressure waves induce periodical vortex shedding from the combustor dump plane, thus changing, the flame shape and location. This leads to temporal and spatial fluctuations in heat release rate, and the Rayleigh index, the correlation between pressure and heat release fluctuations, indicates that these fluctuations are coupled to sustain combustion oscillations. Secondary fuel injection control is introduced to charge the coupling between these factors. This numerical simulation succeeds in reproducing reduced combustion oscillations with constant injection of 3 percent fuel through the swirler hub injection ports. The change in flame shape is reproduced and the reduced amplitude can be attributed to the change in heat release distribution as the Rayleigh index implies. Thus, it is expected that the amplitude may be reduced further when injection phase control is additionally introduced with a feedback control system, and this is our future research subject., 資料番号: AA0049212011, レポート番号: JAXA-SP-05-017},
 pages = {71--75},
 publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)},
 title = {希薄予混合燃焼器内の燃焼挙動に関する数値解析},
 volume = {JAXA-SP-05-017},
 year = {2006}
}