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首页> 外文期刊>Combustion Science and Technology >Control of Heat Release and NO Emissions in a Combustor Through Modulation of Transverse Air-Jets
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Control of Heat Release and NO Emissions in a Combustor Through Modulation of Transverse Air-Jets

机译：通过调节横向空气射流来控制燃烧室的放热和NO排放

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The effect of modulated air jets, introduced through the combustor shell, on the temperature distribution and nitric oxide emissions is investigated. Temperature and emissions measurements have been made at a number of forcing frequencies in the range of 100-850 Hz, blowing ratios in the range of 4-10 and equivalence ratios between 0.6 and 1.0. Open-loop flame response to forcing has also been acquired by recording pressure spectra. Results show that substantial reductions in nitric oxide emissions index (15-30%) can be obtained over a wide range of flow conditions with side-air jet forcing. In addition, forcing also alters the time averaged temperature field, with higher mean temperatures close to the dump plane, due to enhanced fuel-air mixing. The higher temperatures and volumetric heat release obtained with forcing can enable more compact combustor designs. The lower emissions are potentially linked to greater unsteadiness with forcing.
机译：研究了通过燃烧室壳体引入的调制空气射流对温度分布和一氧化氮排放的影响。已在100-850 Hz范围内的多个强迫频率，4-10范围内的吹风比以及0.6-1.0之间的当量比下进行了温度和排放测量。通过记录压力谱图也已经获得了对强迫的开环火焰响应。结果表明，在侧气流喷射的作用下，可以在很宽的流量范围内使一氧化氮排放指数大幅降低（15-30％）。此外，由于增强了燃料与空气的混合，强迫也改变了时间平均温度场，平均温度接近倾卸平面。通过强制获得更高的温度和更大的热量释放可以实现更紧凑的燃烧器设计。较低的排放量可能与强迫作用带来更大的不稳定性有关。

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