摘要
设计了内置半球条栅形障碍物的气云爆燃实验系统,爆燃过程的压力 时间曲线由动态响应时间小于1ms的数据采集系统通过计算机记录、储存与输出,数据采集系统由压力传感器、A/D采集卡和计算机组成。通过编制冲量计算程序,由压力 时间曲线算得各测点的冲量值。对气云爆炸冲量场与可燃气云浓度、障碍物特性参数之间的关系进行了实验研究,结果表明,乙炔 空气混合物的最危险的混合物体积分数为13.3%;障碍物空隙率、半径、空隙宽度及条栅宽度对冲量场的影响非常显著,而它们之间的交互作用几乎没有什么影响。通过曲线拟合和方差分析得到了半球形气云爆炸冲量场的近似余弦衰减规律。
An experimental system was designed to study vapor cloud explosion built-in a hemispherical bar grating obstruction. The pressure-time history of deflagration was recorded by the data-acquisition system composed of pressure transducers, an A/D card and a computer, whose dynamic responsive time is less than 1 ms. A program was designed to calculate the impulse of the observed spot on the basis of the pressure-time history. The relation between explosion impulse field and flammable vapor cloud concentration, obstruction characteristic parameter was studied. The experimental results showed that the most hazardous mixture concentration was 13.3% for acetylene/air mixture. The interspaced ratio, radius, interspaced width and bar grating width of obstructions affected remarkably, whereas the interaction between these variables affected very little. An approximate cosine decline relationship between impulse and distance in the hemispherical vapor cloud was obtained by means of curve fitting and deviation analysis.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2004年第6期63-67,共5页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金(No.50076006)
辽宁省博士启动基金(20021064)资助项目
关键词
可燃气云
爆炸
冲量
Analog to digital conversion
Curve fitting
Data acquisition
Experiments
Flammability
Pressure transducers
