摘要
采用ＬＤＡ及特殊粉尘测试系统测定了ＲＭＳ紊流度、流速及粉尘浓度，在标准的１ｍ３容器和１２ｍ３筒仓中进行的实验表明，１２ｍ３筒仓中的粉尘浓度与１ｍ３的数值相同，而１ｍ３容器的ＲＭＳ紊流度竖直分量（经０．６ｓ，ＲＭＳ＝５ｍ／ｓ）比１２ｍ３筒仓的值约高出２．５倍；若采用机械喷粉，则紊流度约高出１０倍。
In this study RMS turbulent velocities, flow velocities and dust concentration are determined with a LDA-system and a special dust measuring system. Tests are carried out in astandard 1m3-vessel and in a 12m3- silo fed with dust pneumatically and mechanically, respectively. The results show that the dust concentration in the 12m3-silo is at least as highas in the standard vessel. However, the RMS turbulence velocity in the 1m3-vessel (after0. 6s RMS= 5) for the vertical component is about 2. 5 times higher than in the pneumatically filled 12m3 -silo, and using mechanical filling the turbulence is about 10 times lowerthan in the above-mentioned 1m3-vessel.
出处
《中国安全科学学报》
CAS
CSCD
1995年第3期30-33,共4页
China Safety Science Journal
