| 引用本文: | 张宇明,郜冶,邹高万,董惠,霍岩.大尺度管道爆炸火焰速度计算模型[J].哈尔滨工业大学学报,2013,45(5):101.DOI:10.11918/j.issn.0367-6234.2013.05.019 |
| ZHANG Yuming,GAO Ye,ZOU Gaowan,DONG Hui,HUO Yan
.Calculating model of flame front speed during explosion in full-scale pipe[J].Journal of Harbin Institute of Technology,2013,45(5):101.DOI:10.11918/j.issn.0367-6234.2013.05.019 |
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| 摘要: |
| 通过理论分析和实验方法研究了管道内爆炸火焰速度,旨在为预测和评估爆燃火焰速度提供一种基于理论和实验的半经验计算方法．研究表明,火焰速度可以简化为湍流燃烧速度和热膨胀速度叠加的结果,推导出利用压力计算湍流燃烧速度和热膨胀速度的模型,并提出了利用压力、层流燃烧速度、湍流燃烧速度和热膨胀速度计算火焰速度的方法．对贫燃(φ=0.967)和富燃(φ=1.21、1.45)预混气体爆炸实验和计算分析表明,压力沿长径比增大方向呈线性增大;层流燃烧速度以线性关系正比于压力变化,接近化学当量比情况下的变化速率较大,φ=1.21条件下的层流燃烧速度值最大;压力变化和层流燃烧速度增大对湍流燃烧速度的影响不明显,对热膨胀速度的影响显著;压力和层流燃烧速度不是湍流燃烧速度的决定性因素而是热膨胀速度的决定性因素． |
| 关键词: 爆炸力学 火焰速度 压力 大尺度管道 |
| DOI：10.11918/j.issn.0367-6234.2013.05.019 |
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| 基金项目:中央高校基本科研业务费专项基金资助项目(HEUCFT130203);科技部对俄合作资助项目(2011DFR70180). |
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| Calculating model of flame front speed during explosion in full-scale pipe |
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ZHANG Yuming,GAO Ye,ZOU Gaowan,DONG Hui,HUO Yan
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(College of Aerospace and Civil Engineering, Harbin Engineering University, 150001 Harbin, China)
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| Abstract: |
| The method of calculating the flame front speed of the explosion in the pipe is researched by theoretical analysis and experiments. The model of calculating turbulent burning velocity and expansile velocity by pressure is deduced after the simplification of flame front speed to be the result of turbulent burning velocity and expansile velocity, and the method of calculating flame front speed is advanced by pressure, laminar burning velocity, turbulent burning velocity and expansile velocity. The calculating analysis and explosion experiments of the premixed mixture under the condition of the lean fuel (equivalence ratio equal to 0.967) and rich fuel (equivalence ratio equal to 1.21 and 1.45) indict that the pressure is linear with the accretion of length to diameter ratio on the longitudinal direction, and the laminar burning velocity is linear with the pressure variation, and the change rate of laminar burning velocity is larger when the equivalence ratio approaches the stoichiometric one while the laminar burning velocity is the largest at the equivalence ratio of 1.21. The effect of pressure variation and laminar burning velocity increasing on turbulent burning velocity is not apparent, but is apparent on the expansile velocity, so the pressure and laminar burning velocity is the decisive factor in expansile velocity but not in turbulent burning velocity. |
| Key words: mechanics of explosion flame front speed pressure full-scale pipe
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