关键词:燃爆；爆炸压力；最大爆炸压力上升速率；层流燃烧速度

Journal of Propulsion Technology ›› 2019, Vol. 40 ›› Issue (4): 844-850.

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关键词:燃爆；爆炸压力；最大爆炸压力上升速率；层流燃烧速度

CAS Key Laboratory of Mechanical Behavior and Design of Materials，University of Science and Technology of China，Hefei 230027，China,CAS Key Laboratory of Mechanical Behavior and Design of Materials，University of Science and Technology of China，Hefei 230027，China;State Key Laboratory of Fire Science，University of Science and Technology of China，Hefei 230027，China,Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration，Nanjing Engineering Institute of Aircraft System，Nanjing 211106，China,CAS Key Laboratory of Mechanical Behavior and Design of Materials，University of Science and Technology of China，Hefei 230027，China,CAS Key Laboratory of Mechanical Behavior and Design of Materials，University of Science and Technology of China，Hefei 230027，China and CAS Key Laboratory of Mechanical Behavior and Design of Materials，University of Science and Technology of China，Hefei 230027，China

Published:2021-08-15

氢气对正己烷-空气燃爆性能的影响

张莉¹,马宏昊^1,2,潘俊³,沈兆武¹,王鲁庆¹,刘锐¹

中国科学技术大学中国科学院材料力学行为和设计重点实验室，安徽合肥 230027,中国科学技术大学中国科学院材料力学行为和设计重点实验室，安徽合肥 230027; 中国科学技术大学火灾科学国家重点实验室，安徽合肥 230027,南京机电液压工程研究中心航空机电系统综合航空科技重点实验室，江苏南京 211106,中国科学技术大学中国科学院材料力学行为和设计重点实验室，安徽合肥 230027,中国科学技术大学中国科学院材料力学行为和设计重点实验室，安徽合肥 230027,中国科学技术大学中国科学院材料力学行为和设计重点实验室，安徽合肥 230027

作者简介:张莉，硕士生，研究领域为蒸气态燃料爆燃爆轰。E-mail: zhangliy@mail.ustc.edu.cn 通讯作者:马宏昊，博士，副教授，研究领域为炸药理论、新型爆破器材、爆炸力学、气体爆轰和阻火机理等。
基金资助:
国家自然科学基金(51674229)；中央高校基本科研业务费专项资金(WK2480000002)；中航工业技术创新基金

Abstract

Abstract: To study the effects of hydrogen addition on the deflagration characteristics of n-hexane/air mixture，the explosion process was investigated in a constant volume combustion chamber. Experiments were carried out at initial temperature of 353K，initial pressures of 100kPa，equivalence ratios range of 0.7～1.7 and hydrogen blended ratios of 0%～80%. The effects of hydrogen addition on the flame propagation process，laminar burning velocity and the explosion pressure were obtained. The results show that the unstretched flame propagation speed and laminar burning velocity increase at first and then decrease gradually with the increase of equivalence ratio from 0.7 to 1.7. The highest values are measured near the equivalence ratio of 1.0. Furthermore，the flame laminar burning velocity of n-hexane/air/hydrogen mixture substantially increases with hydrogen addition，showing the development of combustion capacity and thermal efficiency. For stoichiometric mixtures，the laminar burning velocity at the hydrogen fraction of 80% is 2.5 times higher than that of n-hexane/air mixtures. At the same time，the hydrogen addition has a significant influence on the explosion pressure and rate of maximum pressure rise，especially for the over lean or overrich mixture.

Key words: Deflagration；Explosion pressure；Maximum rate of explosion pressure rise；Laminar burning velocity

摘要： 为了研究氢气对正己烷燃爆性能的影响，在定容燃烧室内实验测量了初始温度为353K，初始压力为100kPa，当量比0.7～1.7，掺氢比0%～80%时，正己烷-氢气-空气混合气的爆炸过程，得到了氢气对火焰传播规律、层流燃烧速率及爆炸压力的影响。研究结果表明，当量比从0.7增加到1.7，无拉伸火焰传播速率和层流燃烧速率呈先增大后减小的趋势，在当量比1.0附近达到最大；随着掺氢比的提高，混合气的燃烧速率明显增大，有利于提高燃料的燃烧效率，当量比为1.0时，掺氢比80%的混合气层流燃烧速率比正己烷-空气混合气提高了2.5倍；同时，掺氢比对混合气的爆炸压力与最大爆炸压力上升速率有明显的影响，对过稀或过浓燃料的影响尤为显著。

关键词: 燃爆；爆炸压力；最大爆炸压力上升速率；层流燃烧速度

ZHANG Li¹,MA Hong-hao^1,2,PAN Jun³,SHEN Zhao-wu¹,WANG Lu-qing¹,LIU Rui¹. 关键词:燃爆；爆炸压力；最大爆炸压力上升速率；层流燃烧速度[J]. Journal of Propulsion Technology, 2019, 40(4): 844-850.

张莉,马宏昊,潘俊,沈兆武,王鲁庆,刘锐. 氢气对正己烷-空气燃爆性能的影响[J]. 推进技术, 2019, 40(4): 844-850.

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关键词:燃爆；爆炸压力；最大爆炸压力上升速率；层流燃烧速度

氢气对正己烷-空气燃爆性能的影响

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