Volume 14, Issue 15 (2015)                   Modares Mechanical Engineering 2015, 14(15): 11-16 | Back to browse issues page

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Poorhoseini S H, Moghiman M. An experimental study on the effect of synchronous combustion of gas- gasoil on luminosity and radiative heat transfer of natural gas flame. Modares Mechanical Engineering. 2015; 14 (15) :11-16
URL: http://journals.modares.ac.ir/article-15-3979-en.html
Abstract:   (4228 Views)
This is a study of the effect of synchronous combustion of gas-gasoil, achieved through the injection of gasoil droplets into natural gas flame, on the flame luminosity and radiative heat transfer. Droplets were injected by a single-hole micro-nozzle with a hole diameter of 100 μm and injection pressure of 9 bars. A photovoltaic cell was used to determine the luminous radiation and the total radiation of flame was measured by a thermopile. Also, the combination of chemiluminescence and IR photography of flame were employed to determine the qualitative distribution of soot particles in flame. The results show that the synchronous combustion of gas-gasoil raises the soot content of flame, leading to an increase of the luminosity and volume reaction of flame 38 and 2.5 times in comparison to the non-injection mode. Also, for the synchronous combustion of gasoil and gas with a mass fraction of 10%, the flame temperature changed only 95˚C, whereas the flame radiation rose as much as 52%. The improvement of flame radiation in synchronous combustion of gas-gasoil is due to the enhancement of flame emissivity coefficient in the IR region of electromagnetic wavelengths. Meanwhile, the injection of gasoil droplets increased the CO and NO pollutants by 4 ppm and 35 ppm in comparison to the non-injection mode; Due to the low mass flow rate of injection, however, the increase does not exceed the allowable limit for outlet pollution.
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Article Type: Research Article | Subject: Combustion|Heat & Mass Transfer
Received: 2014/07/13 | Accepted: 2014/09/14 | Published: 2014/10/18

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