旋回噴流燃焼器を用いた強乱流予混合火炎の研究 第1報 レーザトモグラフィー法による火炎構造の可視化
書誌事項
- タイトル別名
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- A Study on Highly Turbulent Premixed Flames in a Cyclone-Jet Combustor. 1st Report. Visualization of Flame Structure with Tomographic Images.
- センカイ フンリュウ ネンショウキ オ モチイタ キョウ ランリュウ ヨ コンゴウ カエン ノ ケンキュウ ダイ1ポウ レーザ トモグラフィーホウ ニ ヨル カエン コウゾウ ノ カシカ
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By using a cyclone-jet combustor, we have investigated premixed flames in a highly turbulent flow over a wide range of turbulent properties, with u'/SL exceeding 10 in a stationary jet flame. With Mie scattering, we obtained tomographic images to visualize the flame structure. We have investigated the velocity field in cold flow with a hot wire anemometer. Results show that, as the turbulence is relatively low, the scale of the turbulence is large and one flame sheet wrinkles, which shows that a typical wrinkled laminar flame is formed. As the exit velocity is further increased, the flame wrinkling is increased, but the size of its wrinkles becomes small with many cusps of the flame front. In some cases, the burned gas may exist in the unburned gas, and vice versa. When the velocity exceeds 30 m/s, one continuous flame sheet cannot be sustained, and the destruction of laminar flame structure occurs, in which small reacting eddies in an intermediate stage of combustion may be embedded. These results are supported by the fact in previous experiments that the probability of intermediate temperature between those of unburned and burned gases becomes high and the PDF of temperature is no longer bimodal. Thus, it appears that, a flame structure changes to be that with distributed reaction zone as the intensity of turbulence is increased.
収録刊行物
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- 日本機械学会論文集B編
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日本機械学会論文集B編 65 (637), 3185-3190, 1999
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001206184608896
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- NII論文ID
- 130004223607
- 110002395620
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- NII書誌ID
- AN00187441
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- COI
- 1:CAS:528:DyaK1MXnsleksr8%3D
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- ISSN
- 18848346
- 03875016
- http://id.crossref.org/issn/03875016
- http://id.crossref.org/issn/00290270
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- HANDLE
- 2237/9330
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- NDL書誌ID
- 4859844
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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
- IRDB
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可