蜂窝陶瓷蓄热体阻力特性的数值模拟  

Numerical Simulation on Flow Resistance of Honeycomb Ceramic Regenerators

作　　者：王波[1] 刘梦辉 商庆垄 孙成喜 WANG Bo;LIU Meng-hui;SHANG Qing-long;SUN Cheng-xi(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《热能动力工程》2020年第7期152-158,共7页Journal of Engineering for Thermal Energy and Power

摘　　要：蓄热氧化炉中蜂窝陶瓷蓄热体的流动阻力对运行能耗有重要影响。基于简化的单孔模型,在相同的孔截面积和当量直径条件下,分别对三角形孔、正方形孔、正六边形孔和圆孔的蜂窝陶瓷蓄热体中气体的流动进行了数值模拟。结果表明:孔截面积、孔长和气体流速相同时,流动阻力从大到小为正三角形孔、正方形孔、正六边形孔和圆孔;孔的当量直径、孔长和气体流速相同时,流动阻力从大到小为正三角形孔、正六边形孔、圆形孔和正方形孔;相同孔型的蜂窝陶瓷,其沿程阻力系数均随雷诺数的增大而减小;在相同的雷诺数下,高度越短的蓄热体其沿程阻力系数越大。根据模拟结果分别回归出不同孔型蓄热体沿程阻力系数与雷诺数之间的关联式。The flow resistance of the honeycomb ceramic regenerator in the regenerative thermal oxidizer has an important influence on the operating energy consumption.Based on the simplified single-hole model,the flow of gas in the honeycomb ceramic regenerator of triangular,square,regular hexagonal and circular holes was numerically simulated under the same hole cross-sectional area and equivalent diameter.The results show that when the pore cross-sectional area,pore length and gas flow rate are the same,the flow resistance is largest for a regular triangular hole,followed by a square hole,a regular hexagonal hole and a circular hole.When the equivalent diameter,the hole length and the gas flow rate are the same,flow resistance is highest for a regular triangular hole,followed by a regular hexagonal hole,a circular hole and a square hole.For honeycomb ceramic of the same hole type,its resistance coefficient decreases with the increase of Reynolds number,and the honeycomb ceramic with a shorter length has a larger drag coefficient along the path under the same Reynolds number.Finally,according to the simulation results,the correlation between the drag coefficient of different pore-type regenerators and the Reynolds number is obtained.

关 键 词：挥发性有机物 蓄热氧化 蜂窝陶瓷 多孔介质 层流 

分 类 号：TQ051.5[化学工程]