TY - JOUR JF - mdrsjrns JO - Modares Mechanical Engineering VL - 14 IS - 15 PY - 2015 Y1 - 2015/3/01 TI - An experimental study on the effect of synchronous combustion of gas- gasoil on luminosity and radiative heat transfer of natural gas flame TT - مطالعه آزمایشگاهی اثر هم‌سوزی گاز- گازوئیل بر درخشندگی و انتقال حرارت تابشی شعله گاز طبیعی N2 - 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. SP - 11 EP - 16 AU - Poorhoseini, Seyed Hadi AU - Moghiman, Mohammad AD - KW - Natural gas KW - Synchronous combustion KW - Gasoil spray KW - Radiation heat transfer UR - http://mme.modares.ac.ir/article-15-3979-en.html ER -