書誌事項
- タイトル別名
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- Direct Numerical Simulations for the Effects of Small Perturbation on the Intrinsic Instabilities of Two-dimensional Hydrogen/air Premixed Flames
- 2ジゲン スイソ クウキ ヨ コンゴウ カエン ノ コユウ フアンテイ ニ オヨボス ビショウ ジョウラン ノ エイキョウ ニ カンスル チョクセツ スウチ シミュレーション
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<p>Direct numerical simulations were implemented and studied for the intrinsic instabilities of two-dimensional hydrogen/air premixed planar flames. The 6th-order compact finite difference scheme was used for the spatial discretization, and the 3rd-order Runge-Kutta method for the time advancement. The boundary conditions were based on the Navier-Stokes characteristic boundary conditions. The hydrogen/air detailed kinetics, which contains 9 species and 35 elementary reactions, was used. Small perturbation was imposed at the upstream boundary of the calculation domain (a rectangle), and then the perturbation grew up when it reached a planar flame. The flame became unstable due to the intrinsic instabilities. Afterwards, a cusp, which was a concave part towards the unburned gas, appeared, and developed rapidly. It is considered to be due to the diffusive-thermal instability. And then, the cusp was closing, while a convex part towards the unburned gas appeared. This is considered as a cellular structure. The dispersion relation between the wave number and the growth rate of the perturbation was obtained and compared with a theoretical prediction. The behaviour of the flame was qualitatively similar to one obtained in past experiments. Furthermore the results with the perturbation imposed continuously and in a limited time were compared.</p>
収録刊行物
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- 日本燃焼学会誌
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日本燃焼学会誌 45 (133), 184-190, 2003
一般社団法人 日本燃焼学会
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詳細情報 詳細情報について
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- CRID
- 1390564227326470528
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- NII論文ID
- 10017023620
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- NII書誌ID
- AA11658490
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- ISSN
- 24241687
- 13471864
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- NDL書誌ID
- 6717749
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可