Boron-Nitride Nanosheet-Based Thermal Barrier Coating for Micro-Combustor Performance Improvement
Boron-Nitride Nanosheet-Based Thermal Barrier Coating for Micro-Combustor Performance Improvement
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用于提高微型燃烧器性能的氮化硼纳米片热障涂层
DOI：
10.1115/1.4052734
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Gupta, Ashwani K.
中科院分区：
文献类型：
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作者：
Yang, Bao;Hu, Liangbing;Ping, Weiwei;Roy, Rishi;Gupta, Ashwani K.
开发微型燃烧器的主要挑战之一是热损失导致火焰熄灭，燃烧效率和性能降低。在这项工作中，使用六方氮化硼（h-BN）纳米片作为构建块开发了一种新型热障涂层（TBC），并将其应用于瑞士辊微型燃烧器，以确定其在燃烧器内温度升高时的热损失，从而有助于提高性能。结果表明，在相同的热负荷和运行条件下，h-BN TBC可使微燃烧室的燃烧温度从850 K提高到970 K。使用BN TBC的显著升温源于其低的平面导热系数0.4 W m−1K−1，以减轻微燃烧室板的热损失。h-BN TBC中如此低的导热率归因于其纳米片之间的界面电阻。h-BN TBC的发展为燃气涡轮发动机、火箭发动机和各种微型燃烧室的性能改进提供了一种有效的热管理方法。
One of the major challenges in the development of micro-combustors is heat losses that result in flame quenching, and reduced combustion efficiency and performance. In this work, a novel thermal barrier coating (TBC) using hexagonal boron nitride (h-BN) nanosheets as building blocks was developed and applied to a Swiss roll micro-combustor for determining its heat losses with increased temperatures inside the combustor that contributes to improved performance. It was found that by using the h-BN TBC, the combustion temperature of the micro-combustor increased from 850 K to 970 K under the same thermal loading and operational conditions. This remarkable temperature increase using the BN TBC originated from its low cross-plane thermal conductivity of 0.4 W m−1K−1to mitigate the heat loss from the micro-combustor plates. Such a low thermal conductivity in the h-BN TBC is attributed to its interfacial resistance between the nanosheets. The development of h-BN TBC provides an effective approach to improve thermal management for performance improvements of gas turbine engines, rocket engines, and all various kinds of micro-combustors.