冲击波引起瓦斯爆炸的动力学特性仿真研究

美国学者苏黛瑞的《在中国城市中争取公民权:农民工、国家与市场逻辑》一书,以公民权为切入点,揭示了在国家计划体制、市场与农村流动人口三方动态博弈过程中,农民工的流动路径、其城市居留形态的塑造及城市生存策略。作为一本美籍学者对当代中国流动人口的研究论著,对国内学界而言,其价值在于不仅提供了农民工研究的新视角,而且更新了流动人口的研究范式,对中国流动人口研究有相当的启发与借鉴意义。

Dynamic simulation of gas explosion caused by shock waves

Gas explosions caused by shock waves in pipeline were simulated experimentally, and dynamic characteristics of gas explosion were investigated by model simulation. The results show that the speed and pressure changes of shock waves are similar, and the extent of relevant data fluctuation after explosion caused by combustion is less than that caused by shock wave under the same gas concentration. With the increase of the pipeline length and diameter ratio, the shock-wave transmitting speed, the pressure, speed and temperature in gas accumulation area also increase, and the reaction intensity in these area is higher and the explosion is easier. The temperature at initial reaction surface increases with the combustion rate, and the pressure of shock wave stimulates combustion reaction. The propagation of gas explosive wave becomes stronger after initial reaction surface.