哈特曼装置上粉尘浓度的测量

粉尘浓度和湍流速度对粉尘爆炸猛烈程度和粉尘云最小着火能的测试有很大影响.针对1.2 L哈特曼装置上的粉尘浓度进行了测量研究,并对测量数据进行了分析讨论,得到了1.2 L哈特曼管上不同位置高度的粉尘浓度随时间的变化曲线.粉尘浓度随哈特曼管高度位置分布很不均匀.对于哈特曼管电极位置高度,当点火延迟时间170 ms、计算浓度为500 g/m3时,其粉尘测量浓度近似等于计算浓度;当计算浓度低于500 g/m3时,其测量浓度高于计算浓度.当计算浓度大于500 g/m3时,测量浓度低于计算浓度.哈特曼管上粉尘浓度随高度分布的获得,为最小着火能在不同装置上的测试比较提供了数据,为粉尘爆炸数学模型的检验提供了...

Measurement of Dust Concentration in Hartmann Bomb

The dust concentration and velocity of turbulence have significant effects on the level of explosion and measurement of the minimum ignition energy of dust clouds.The research conducted a measurement study on the dust concentration in a 1.2L Hartmann Bomb,analyzed the measurement data,and finally obtained the time-dependent curves of dust concentration at different heights in a 1.2L Hartmann Bomb.The dust concentration along heights in the Hartmann Bomb distributes ununiformly.For a given position height of the electrode in the Hartmann Bomb and the ignition delay time of 170ms,when the calculated concentration is 500g/m3,the measured concentration equates approximately to the calculated concentration;when the calculated concentration is lower than 500g/m3,the measured concentration is higher than the calculated concentration,and vice versa.The obtaining of the distribution of dust concentration along the heights in the Hartmann Bomb provides both the data for the comparison of the measurement and test of the minimum ignition energy at different equipments and the supporting evidences for the verification of the mathematic model of dust explosion.