湍流火焰中的热释放速率测量

2018/12/13   下载量： 0 次

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应用领域 能源/新能源
检测样本 其他
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参考标准 暂无

采用LaVision的平面激光诱导荧光(PLIF)测试系统，同时测量湍流火焰中的OH和CH2O自由基。测试系统由两台Nd:YAG激光器(Continuum Surelite), 两台染料激光器(Sirah Cobra-Stretch) 和两台高分辨率双脉冲增强型CCD相机构成(Lavision Nanostar). 系统还可以测量OH自由基的自发荧光图像。

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In this work, we report on the direct measurement of heat release rates via simultaneous laser-induced fluorescence of OH and CH2O radicals using planar laserinduced fluorescence (PLIF). The product of the two images is shown to correlate with the forward production rate of the HCO radical, which in turn has been found to correlate well with heat release rates in premixed hydrocarbon flames. Heat release rate measurements were also taken with OH* for comparisons with the results from the laser-based technique. The measurements were made in a lean turbulent premixed flame subject to acoustic forcing; this flame mimics the instabilities encountered in lean premixed pre-vaporized combustors (LPP). As the scheme is based on probing radical species that participate in the major heat release reactions, it is the closest nonintrusive measure of heat release rate currently available and thus presents a very
useful diagnostic tool in combustion research.

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北京欧兰科技发展有限公司
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