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首页> 外文期刊>Transaction of the Hongkong Institute of Engineers >Heat Transfer of Premixed Butane/Air Impinging Circular Flame Jet with Induced Swirl
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Heat Transfer of Premixed Butane/Air Impinging Circular Flame Jet with Induced Swirl

机译：预混合丁烷/空气撞击涡流喷射火焰的传热

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摘要

In addition to the main axial flow of butane/air mixture, two tangential airflows had been used to produce a premixed gas-fired impinging circular flame jet with induced swirl. The flame jet system under investigation was small-scale and operated essentially at the low-pressure and laminar flow conditions. The swirl number was estimated, with the aid of the Continuity Equation, to be 0.78. The whole investigation was conducted at R{sub}e = 1000 and Φ = 1. The non-dimensional nozzle-to-plate distance (H/d) was varied from 1.0 to 3.0. The radial heat flux distributions on the horizontally placed impingement plate had been measured under various experimental conditions, which were compared with those obtained from a previous study [1] with similar impinging flame jet system without induced swirl. The total heat fluxes obtained on the impingement plate at different H/d ratio had also been measured to identify its effect on the thermal performance of the system. It was shown from the present study that the introduction of swirl to the small-scale, low-pressure and low Reynolds number premixed gas-fired impinging flame jet was feasible. Certainly, more investigations would be required to fully understand its heat transfer characteristics.
机译：除了丁烷/空气混合物的主要轴向流外，还使用了两个切向气流来产生预混合的燃气撞击环形火焰射流，并产生涡流。所研究的火焰喷射系统是小型的，基本上在低压和层流条件下运行。借助于连续性方程，估计旋流数为0.78。整个研究在R {e} = 1000且Φ= 1的条件下进行。无量纲的喷嘴到板的距离（H / d）从1.0到3.0变化。已经在各种实验条件下测量了水平放置的冲击板上的径向热通量分布，并将其与从以前的研究[1]中获得的结果进行了比较，这些研究是使用类似的冲击火焰喷射系统而没有引起涡流的。还测量了在冲击板上以不同的H / d比获得的总热通量，以确定其对系统热性能的影响。从目前的研究表明，将旋流引入到小规模，低压和低雷诺数预混合燃气撞击火焰射流是可行的。当然，需要进行更多研究才能完全了解其传热特性。

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