CAJ | 학술논문

为揭示瓦斯在强爆和弱爆情况下冲击波超压变化规律，利用一维爆炸物理模型和爆炸理论，构建了冲击波超压随距离变化的数学模型，并用一端开口的半封闭爆炸试验装置，在保持瓦斯浓度和其他条件不变，仅改变点火能量大小实现了瓦斯爆燃和爆轰，验证理论求解。结果表明：半封闭受限空间内，爆燃情况下火焰传播速度要远小于爆轰条件下火焰传播速度，爆燃火焰传播速度为亚音速，爆轰为超音速；爆轰与爆燃的冲击波超压的理论解都小于实验值，但整个传播变化趋势基本一致；极强冲击波最大超压值与传播距离成反比，极弱冲击波最大超压值与传播距离的平方根成反比；爆燃和爆轰冲击波在燃烧区内的传播变化趋势与理论解基本吻合。研究结果为防治瓦斯爆炸破坏及爆炸事故灾害勘验提供了技术和理论支持。
위게시와사재강폭화약폭정황하충격파초압변화규률，이용일유폭작물리모형화폭작이론，구건료충격파초압수거리변화적수학모형，병용일단개구적반봉폐폭작시험장치，재보지와사농도화기타조건불변，부개변점화능량대소실현료와사폭연화폭굉，험증이론구해。결과표명：반봉폐수한공간내，폭연정황하화염전파속도요원소우폭굉조건하화염전파속도，폭연화염전파속도위아음속，폭굉위초음속；폭굉여폭연적충격파초압적이론해도소우실험치，단정개전파변화추세기본일치；겁강충격파최대초압치여전파거리성반비，겁약충격파최대초압치여전파거리적평방근성반비；폭연화폭굉충격파재연소구내적전파변화추세여이론해기본문합。연구결과위방치와사폭작파배급폭작사고재해감험제공료기술화이론지지。
To reveal the laws about gas under the condition of strong detonation and weak detonation shock wave overpressure changing,with one -dimension explosion physical model and the theory,the mathematical model of shock wave overpressure changing with distance was set up.With a change of ignition energy and gas concentration of unchanged in the pipe,the gas detonation was achieved and the theory solution was verified in semi-enclosed space.Results show that the strong shock wave overpressure change is inversely proportional to the propagation distance, very weak shock wave overpressure and the propagation distance is inversely proportional to the square root of.Under the condition of deflagration flame propagation speed is much less than the detonation under the conditions of flame propagation speed.Detonation and deflagration of the theoretical solution is less than the experimental value,but the whole transmission trends are basically identical.Value theory solution agreed with the experimental values. The research results provide technical support and theoretical guidance for the prevention and control of gas explosion accident.