Effects of the internal structures of monolith ceramic substrates on thermal and hydraulic properties: additive manufacturing, numerical modelling and experimental testing
Effects of the internal structures of monolith ceramic substrates on thermal and hydraulic properties: additive manufacturing, numerical modelling and experimental testing
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DOI：
10.1007/s00170-020-06493-2
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发表时间：
2020-12
期刊：
影响因子：
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通讯作者：
Nikolina Kovacev;Sheng Li;S. Zeraati-Rezaei;H. Hemida;A. Tsolakis;K. Essa
中科院分区：
文献类型：
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作者：
Nikolina Kovacev;Sheng Li;S. Zeraati-Rezaei;H. Hemida;A. Tsolakis;K. Essa
严格的排放法规要求在不影响内燃机燃烧过程和CO2排放的情况下，使用更高效的被动控制催化剂进行废气后处理。尽管现有技术的陶瓷蜂窝基材设计提供了高表面积和一定程度的热质传递适应性的灵活性，但是当引入更灵活的设计以提供有效的热管理时，可以实现额外的减排益处。传统的堇青石蜂窝基材是通过挤出制造的;因此，只能制造具有直通道的基材。本研究旨在通过采用增材制造作为使用DLP（数字光处理）技术制造金刚石晶格结构的主要方法来突出传统衬底的任何设计限制。传统的衬底和金刚石晶格结构的流动阻力和温度分布的数值和实验研究。数值模拟结果与实验结果吻合较好。结果表明，与具有相似表面积的基准蜂窝相比，金刚石晶格结构的轴向温度分布增加，压降显著降低（38-45%）。
Rigorous emission regulations call for more efficient passive control catalysts for exhaust gas aftertreatment without affecting the internal combustion process and CO2emissions. Although the state-of-art ceramic honeycomb substrate designs provide high surface area and a degree of flexibility for heat and mass transfer adaptations, additional emission reduction benefits can be achieved when more flexible designs to provide effective thermal management are introduced. The conventional cordierite honeycomb substrates are manufactured by extrusion; therefore, only substrates with straight channels can be fabricated. This study aims to highlight any design limitations of conventional substrates by employing additive manufacturing as the main method of manufacturing diamond lattice structures using DLP (digital light processing) technology. Both conventional substrates and diamond lattice structures are studied numerically and experimentally for flow through resistance and temperature distribution. Numerical predictions and experimental results showed good agreement. The results show the increase of the axial temperature distribution for diamond lattice structures and a significant decrease of the pressure drop (38–45%) in comparison with the benchmark honeycomb with similar surface area.