Measurements on Effects of Locations of Obstacles in an Explosion Chamber
Measurements were performed to investigate the effects on flame and pressure development by varying locations of multiple obstacles in a top-venting explosion chamber. The chamber dimension was 1000 mm in height with a 700 x 700 ram2 cross-section and a rectangular vent area of 700 × 210 ram2. Three different multiple obstacles with blockage ratio of 30 ％ were used by changing from 200 mm, 500 mm to 800 mm in heights within the chamber. Temporally resolved flame front images were recorded by a high speed camera (500 f/s) to investigate the interaction between the propagating flame and the obstacles. The results showed that the triangular bar caused the fastest flame developments at given times whereas the lowest was obtained with the cylindrical bar. It was also found that local flame displacement speeds of different obstacles were sensitive to the locations of obstacles. The local speed becomes larger in going from 200 mm, to 500 mm and to 800 mm in heights. The obstacles in height of 800 mm yielded the highest overpressure whereas the lowest was in height of 200 mm.
obstacle locations flame propagation explosion pressure
LEE Young Soon PARK Dal Jae LEE Tae Sung HAN Jae Beom
Department of Safety Engineering,Seoul National University of Technology,Seoul 139-743,Korea
国际会议
The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)
北京
英文
1047-1052
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）