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首页> 外文会议>International Symposium on Combustion >The role of structural heat exchange and heat loss in the design of efficient silicon micro-combustors
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The role of structural heat exchange and heat loss in the design of efficient silicon micro-combustors

机译：结构热交换和热量损失在高效硅微燃烧器设计中的作用

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The performance of millimeter-scale combustors intended for miniaturized power and propulsion systems is strongly influenced by heat exchange to and within the combustor structure. Accordingly, a one-dimensional model with full chemistry that includes heat exchange to and within the combustor wall has been developed. It is used to study the effects of axial heat transfer from the post-flame to the pre-flame via wall conduction in a silicon micro-channel combustor with planar symmetry. The simulations show that axial heat transfer widens stability limits, increases the burning rate, and can enable the construction of smaller, higher power density combustors. Axial heat transfer also enhances the benefits of operating at elevated pressures. The simulations also show that heat loss to the environment places a lower bound on the combustor volume. Maximum power density combustor configurations are identified under adiabatic and non-adiabatic conditions. The maximum power density tends to increase with increasing pressure while the micro-channel length and height associated with the maximum tend to decrease.
机译：用于小型化功率和推进系统的毫米级燃烧器的性能受到燃烧器结构的热交换的强烈影响。因此，已经开发了一种具有包含热交换和燃烧器壁内的完整化学的一维模型。它用于研究通过平面对称的硅微通道燃烧器中的壁传导通过壁传导来研究轴向热传递到预火焰的效果。模拟表明，轴向传热扩大了稳定性限制，增加了燃烧速率，并且可以实现较小的更高功率密度燃烧器的结构。轴向传热还增强了在升高压力下运行的益处。该模拟还表明，环境对环境的热量损失在燃烧器容积上置于下限。在绝热和非绝热条件下识别最大功率密度燃烧器配置。随着压力的增加，最大功率密度趋于增加，而与最大值相关的微通道长度和高度往往会降低。

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