B-11 燃焼振動下にある希薄予混合弱旋回燃焼器内の火炎と速度場の非定常特性(伝熱・燃焼,一般講演)

• 金井 洸太

  早大院

• 立花 繁

  JAXA

• 山本 姫子

  早大

• 吉田 征二

  JAXA

• 鈴木 和雄

  JAXA

• 佐藤 哲也

  早大

書誌事項

タイトル別名

• B-11 Unsteady characteristics of the flame and velocity field in a lean premixed low-swirl combustor under combustion instability

抄録

Mechanism of the combustion instability in a lean premixed low-swirl combustor with mixture inhomogeneity is investigated by detailed laser measurements. Global flow structures of the unsteady inhomogeneous mixture flame are firstly clarified by the PIV data. The dynamic features of the flow field are compared with the data of the unsteady homogeneous mixture flame in the literature. It is also found from the PIV data that the flame anchoring position locates near the merging point of the impinging and inner shear layer flows. The anchoring position slightly shifts downstream for the lower downstream fuel percentage condition possibly due to the leaner local equivalence ratio in the region. The c^^-_<Mie> contour shows a cyclic motion of a bulge structure. The bulge of fresh gas, which is considered a traveling vortex ring of fresh gas mixture, is periodically moving along the outer shear layer and merging with the stationary vortex flame near the wall.

収録刊行物

• ガスタービン定期講演会講演論文集

  ガスタービン定期講演会講演論文集 (41), 211-216, 2013-10-16

  公益社団法人日本ガスタービン学会

キーワード

• Combustion instability
• Low-swirl
• premixed flame

詳細情報

• CRID: 1570291227907478528
• NII論文ID: 110009864491
• NII書誌ID: AN10255898
• ISSN: 09191941
• 本文言語コード: ja
• データソース種別:
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