Numerical Simulation Of Heat Transfer And Gas Flow Characteristics For Ceramic Honeycomb

High Temperature Air Combustion (HATC) technology is a new combustion technology sprang up from the 90s last century. This technology that is more practical than before has developed rapidly in recent years. The industry furnace adopting HTAC can largely improve heat recovery, bring a new combustion type and diminish NO_x emission, so HTAC technology has an extensive prospect in China.In this paper, the principal, characteristics and application of HTAC technology are described, and the progress of regenerator technology and heat exchange theory are reviewed. Ceramic honeycomb is a key component of HTAC system and the three-dimensional numerical model is established which is for investing unsteady thermal process in honeycomb regenerator. Simulate the working process of honeycomb by computational fluid dynamics (CFD) software; obtain the distributions of velocity, temperature, density and pressure of gas in honeycomb regenerator; obtain outlet temperature, temperature at lengthways of gas, and temperature at lengthways of honeycomb. At the same time, the working state of the honeycomb regenerator was compared and analyzed with different structure and operation parameters of honeycomb, structure and operation parameters are optimized, the change rule of temperature characters, heat recovery rate and pressure loss are researched, and way to decide the optimal switching time is found. Besides, the influence of air feeding efficiency and gas flow deflection etc to the heat recovery rate of honeycomb are discussed.The work in this paper provides a theory basis and guide to the exploitation and appliance of HTAC system and the results of the numerical calculation can be used as the foundation of engineering design.