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采用数值模拟方法对不同孔隙率和孔壁厚的蜂窝陶瓷体的蓄热特性进行研究。对高温空气在不同结构的蜂窝陶瓷体内流动过程中的压降、温度及蜂窝陶瓷体的蓄热特性进行了分析。研究结果表明:流体在蜂窝陶瓷内流动时,处于层流阶段的压降仅为湍流情况下的1/10。蜂窝陶瓷蓄热体的蓄热时间与蓄热体的孔壁厚成正比。蓄热体孔壁厚h=2mm时,出口空气温度达到800K所需的时间仅为2h。停止对蜂窝陶瓷进行热量输入时,蜂窝陶瓷体能进行自身的热平衡,在一定的时间内,使蓄热体内部的温度场趋于平衡。
The numerical simulation method was used to study the heat storage characteristics of honeycomb ceramics with different porosity and wall thickness. The pressure drop, temperature and heat storage characteristics of honeycomb ceramic body during the flow of high temperature air in different structures of honeycomb ceramic body were analyzed. The results show that the pressure drop in the laminar flow stage is only 1/10 of the turbulent flow when the fluid flows in the honeycomb ceramic. The regenerative time of the honeycomb ceramic regenerator is directly proportional to the wall thickness of the heat regenerator. Heat storage body hole wall thickness h = 2mm, outlet air temperature reaches 800K time is only 2h. When the honeycomb ceramic is stopped from inputting heat, the honeycomb ceramic body can perform its own thermal balance, and the temperature field inside the regenerator tends to be balanced within a certain period of time.