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首页> 外文期刊>JSME International Journal. Series B, Fluids and Thermal Engineering >Effects of Turbulence Characteristics in the Spray Combustion
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Effects of Turbulence Characteristics in the Spray Combustion

机译：湍流特性对喷雾燃烧的影响

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The present study was conducted in order to clarify the effects of airflow turbulence on the spray combustion. Methanol was atomized with the two-fluid-type nozzle in order to generate the spray flame, and the turbulence characteristic of the flame was varied by inserting a mesh near the tip of the nozzle. Droplets in the spray flame were measured using a PDPA system in a reaction field, and changes in the turbulence characteristic were measured using a hot-wire anemometer in a no-reaction field in order to clarify the effects of turbulence on combustion behavior. Inserting a finer mesh promoted droplet evaporation and enhanced the dispersion characteristic. Regarding changes in the turbulence characteristic, the integral time scale increased and the energy spectrum decreased as the inserted mesh became finer. Based on the obtained results, we determined that a finer mesh causes vortexes to be more persistent and enhances the dispersion characteristic of the droplets.
机译：进行本研究是为了阐明气流湍流对喷雾燃烧的影响。为了产生喷雾火焰，用二流体型喷嘴将甲醇雾化，并且通过在喷嘴的尖端附近插入网孔来改变火焰的湍流特性。使用PDPA系统在反应场中测量喷雾火焰中的液滴，并在无反应场中使用热线风速计测量湍流特性的变化，以阐明湍流对燃烧行为的影响。插入较细的网孔可促进液滴蒸发并增强分散特性。关于湍流特性的变化，随着所插入网格的变细，积分时间比例增大，能谱减小。根据获得的结果，我们确定较细的网格会导致涡旋更持久，并增强液滴的分散特性。

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