過熱水蒸気で希釈された対向流拡散火炎の安定性に及ぼすふく射熱移動の影響

辐射传热对过热蒸汽稀释逆流扩散火焰稳定性的影响

基本信息

  • 批准号:
    17760171
  • 负责人:
  • 金额:
    $ 2.18万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2006
  • 项目状态:
    已结题

项目摘要

多くの伸長場での燃焼研究に対向流火炎が良く用いられ,これまで多くの知見が得られている.良く知られているように,対向流拡散火炎には二つの消炎限界が存在する.高い伸長率での伸長消炎限界,低い伸長率でのふく射消炎限界である.ふく射消炎は伸長率低下と共に火炎厚さが増し,熱発生率に対するふく射熱損失が増加することで起こる.一方,高伸長率では火炎が薄く,ふく射熱損失は小さいが,滞留時間が短いため消炎に至る.ところが,火炎帯にふく射性ガスである二酸化炭素や水蒸気が多く存在する場合,高い伸長率であってもふく射損失が増え無視出来なくなる可能性がある.また,未燃側にふく射性ガスが存在した場合,ふく射再吸収の効果が大きくなる可能性も考えられる.そこで,本研究では,酸化剤を高温の水蒸気で希釈した場合の水蒸気が高い伸長率での伸長消炎限界に及ぼす影響を明らかにした.酸化剤温度を500℃とし,過熱水蒸気及び窒素で希釈した場合について消炎限界の比較を行った結果,過熱水蒸気で希釈した場合では窒素で希釈した場合に比べ,消炎時伸長率が最大でおよそ50%程度低下することが明らかになった.さらに酸化剤温度を1000℃とし,過熱水蒸気で希釈した場合について消炎限界の測定を行った.また,詳細反応モデル及びふく射の放射・吸収を考慮した数値計算を行った結果,ふく射を単なる熱損失として扱うOptically thin仮定のふく射モデルでは,ふく射の再吸収を考慮したNarrow bandモデルに比べ,熱損失を大きく見積り,酸化剤温度が500℃の場合では消炎時伸長率を最大で30%程度低く見積もることが明らかになった.本研究により,火炎近傍にふく射性ガスが多く存在する場合,高い伸長率であってもふく射熱損失の影響が無視出来なくなることが明らかになった.
There is a lot of research in the field, so that you can use it well, and you can learn more about it. Good people know that there is a limit for anti-inflammation, that there is a limit for anti-inflammation. The limit of high elongation and anti-inflammation is high, and that of low elongation is high. The growth rate is low, and the growth rate is low. On the other hand, the fire is thin with high elongation, the radiation is small, and the retention time is short. There is a combination of carbon diacid, water vapor, and high elongation, and the possibility of radiation loss is poor. There is a combination of radiation, radiation and radiation. In this study, acidizing, high temperature, water steaming, high temperature, high temperature, high temperature The acidizing temperature is 500 ℃, the temperature of acidizing temperature is 500 ℃, the temperature of acidizing temperature is 500 ℃, the temperature of acidizing temperature is 500 ℃, the temperature of acidizing temperature is 500 ℃, the temperature of acidizing temperature is 500 ℃, the temperature of acidizing temperature is 500 ℃, the temperature of acidizing temperature is 500 ℃, the temperature of water steaming and asphyxiating temperature is 500 ℃. The maximum elongation during anti-inflammation is 50% lower than that of normal temperature. The acidizing temperature is 1000 ℃ and the temperature is 1000 ℃. The temperature of the acidizing temperature is 1000 ℃. The results of the calculation of the number of radiosurgents, the number of radiosurgents, the results of the calculation, the results of the The acidizing temperature is 500 ℃ and the maximum elongation is 30%. The temperature is very low. In this study, there is a combination of fire and radiation disease in the vicinity of the fire, and the high elongation rate does not show that the radiation loss is noticeable.

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
過熱水蒸気で希釈された対向流拡散火炎の安定性に及ぼすふく射熱移動の影響
辐射传热对过热蒸汽稀释逆流扩散火焰稳定性的影响
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花井 宏尚其他文献

花井 宏尚的其他文献

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{{ truncateString('花井 宏尚', 18)}}的其他基金

粉じん爆発の爆発限界におよぼす着火の影響
着火对粉尘爆炸爆炸极限的影响
  • 批准号:
    24K07976
  • 财政年份:
    2024
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Relationship between the existence of flow and explosion intensity in a dust explosion accident
一次粉尘爆炸事故中气流的存在与爆炸强度的关系
  • 批准号:
    21K04573
  • 财政年份:
    2021
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
微粒子を含む予混合火炎の振動燃焼解析
含细颗粒预混火焰的振荡燃烧分析
  • 批准号:
    13750159
  • 财政年份:
    2001
  • 资助金额:
    $ 2.18万
  • 项目类别:
    Grant-in-Aid for Young Scientists (B)

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