摘要
在面积为2000m2的实验基地,针对半球条栅型障碍物对半球形气云爆燃冲量场的影响进行了实验研究。可燃介质是13.3%(体积)的乙炔-空气混合气体,气云由0.02mm的聚乙烯薄膜约束,利用数据采集系统记录爆燃压力-时间曲线,通过编制程序计算观测点的冲量。对正、负冲量与障碍物的半径、空隙率的关系以及爆燃场的冲量分布进行了分析。结果表明:障碍物的存在极大地提高了爆燃冲量,在该工况下的气云爆炸正负冲量场近似余弦分布;障碍物半径越大、空隙率越低,爆燃正负冲量越大。
The deflagration experiments were carried out in the 2000 m^2 experimental base to study the enhancement mechanism of deflagration impulse induced by obstacles. Acetylene-air cloud with a 13.3 % （vol） ratio was used as flammable material, which was restricted with 0.02 mm thick polythene film. Positive and negative impulse of deflagration was acquired by means of calculation with pressure recorded by a data-acquisition system whose dynamic responding time was less than 1 ms. Obstacles were composed of plastic binding strip. A series of experiments was completed to research the relations between impulse and obstacle radius, porous ratio and distance from ignition point. The experimental results showed that the deflagration impulse, either positive or negative, was enhanced by obstacles. The deflagration impulse field approximated to cosine curve distribution. The positive and negative impulses increased with increasing barrier radius and with reducing interspaced ratio.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2007年第6期1554-1558,共5页
CIESC Journal
基金
国家自然科学基金项目(50076006)
教育部科学技术研究重点项目(106054)。~~
关键词
可燃气云
爆燃
障碍物
正冲量
负冲量
flammable gas cloud
deflagration
obstacle
positive impulse
negative impulse
作者简介
丛立新（1970-），男，博士研究生。
联系人：毕明树。
