中高开孔率多孔板高温环境下阻力特性试验研究

Experimental study on resistance characteristics of perforated plates with medium and high porosity in high temperature condition

为了研究实际工作环境下中高开孔率多孔板的阻力特性,针对0.3≤开孔率≤0.68、0.21≤相对厚度≤0.5的多孔板,采用与实际烟温相似的空气介质进行阻力特性研究.通过试验发现,多孔板压降随着雷诺数的增大而增大,当雷诺数增大时,不同开孔率多孔板的压降差距逐渐增大;气体温度和雷诺数对多孔板阻力系数几乎无影响.多孔板开孔率与相对厚度对阻力系数的影响较大,阻力系数均随着开孔率和相对厚度的增大而降低.

Several perforated plates with porosity range of 0.3 to 0.68 and relative thickness range of 0.21 to 0.5 were tested with a gas-solid flow medium in similar smoke temperature in order to obtain the influence of geometric parameters and flow state of perforated plates with medium and high porosity on the resistance coefficient.The experimental results show that the perforated-plate pressure drop increases as Reynolds number increases,and the gap of different perforated-plate pressure drop increases when increasing Reynolds number.Gas temperature and Reynolds numbers have almost no influence on the resistance coefficient.The porosity and relative thickness of perforated plate have a great influence on the resistance coefficient,and resistance coefficient decreases as porosity and relative thickness increase.