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电容层析成像(ECT)是一项极具应用前景的过程成像测量技术,该技术具有非侵入、响应快、系统简单等诸多优点。本文成功地将ECT应用于小尺度多孔介质燃烧室中着火、熄火、不稳定燃烧等过程的参数分布检测,检测结果为微燃烧研究提供了重要的依据,同时验证了小尺度燃烧空间中填加多孔介质能显著提高燃烧效率及燃烧稳定性的特点。本文对火焰的介电特性进行了探讨,提出了火焰复等效介电系数模型,给出了火焰复等效介电系数与燃烧场宏观物理量之间定性关系,填补了ECT对火焰感应机理未知的空白。
Capacitance tomography (ECT) is a very promising process imaging measurement technique that offers many advantages such as non-invasiveness, fast response, and simple system. In this paper, ECT is successfully applied to the parameter distribution of ignition, flameout and unstable combustion in a small-scale porous media chamber. The results provide an important basis for the study of micro-combustion. Porous media can significantly improve the combustion efficiency and combustion stability characteristics. In this paper, the dielectric properties of the flame are discussed, and the equivalent dielectric coefficient model of the flame complex is proposed. The qualitative relationship between the equivalent dielectric coefficient of the flame complex and the macroscopic physical quantity of the combustion field is given. Whitespace.