Experimental study on laminar lifted flames of pre-vaporized palm oil biodiesel

Nurmukan Dastan; Tran Manh-Vu; Foo Ji Jinn; Scribano Gianfranco; Chong Cheng Tung; Thanh Cong Huynh

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Experimental study on laminar lifted flames of pre-vaporized palm oil biodiesel

机译：层层升降的棕榈油生物柴油举起的实验研究

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Characteristics of laminar lifted flame of pre-vaporized palm oil biodiesel have been experimentally investigated by varying fuel mole fraction at elevated unburnt gas temperatures. The biodiesel fuel was pre-vaporized and mixed with pre-heated nitrogen at a range of fuel mole fractions of 0.01 - 0.02. The unburnt gas temperature was varied from 500 K to 650 K. The results showed that the increase in jet flow velocity influenced the liftoff of the laminar non-premixed flame. Furthermore, the higher fuel mole fractions and the elevated unburnt gas temperatures led to a reduction in the liftoff height of the flame. Hence, a limited range of conditions, where the lifted flame occurred was determined for a given unburnt gas temperature and fuel mole fraction. At some of the experimental conditions such as 500 K and 550 K, the flames still experienced liftoff even at smaller jet velocities compared to stoichiometric laminar burning velocity of the same mixture. This behavior was believed to associate with the buoyant force produced at the nozzle of the rim, causing secondary entrainment of the mixture flow at relatively low jet flow velocities. The results suggested a correlation between the liftoff height and jet flow velocity, with the inclusion of the stoichiometric laminar burning velocity, regardless of the unburnt gas temperature and fuel mole fraction in the mixture. The adaptation of the buoyancy-induced velocity to the liftoff velocity correlated well with the stoichiometric laminar burning velocity, showing the significance of the buoyant force near the nozzle exit.

机译：通过在升高的Unburnt气体温度下改变燃料摩尔分数，通过改变燃料摩尔馏分进行实验研究了层内升降的棕榈油生物柴油的特性。将生物柴油燃料预蒸发并与预热氮在0.01-0.02的燃料摩尔级分的范围内混合。未燃烧的气体温度从500k变化至650 k。结果表明，喷射流速的增加影响了层状非预混火焰的剥离。此外，较高的燃料摩尔级分和升高的未燃烧气体温度导致了火焰的剥离高度的降低。因此，针对给定的未燃烧气体温度和燃料摩尔分数测定发生的有限条件。在诸如500k和550k的一些实验条件下，与同一混合物的化学计量的层状燃烧速度相比，该火焰仍然在较小的射流速度下仍然经历升降。据信这种行为与边缘喷嘴产生的浮力相关联，导致混合物在相对低的射流速度下流动的次要夹带。结果表明，升降高度和射流速度之间的相关性，包括化学计量层状燃烧速度，无论混合物中的未燃烧气体温度和燃料摩尔级分。浮力诱导的速度适应升空速度与化学计量的层状燃烧速度很好地相关，示出了喷嘴出口附近的浮力的重要性。

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来源
《Fuel》 |2021年第15期|119697.1-119697.8|共8页
作者
Nurmukan Dastan; Tran Manh-Vu; Foo Ji Jinn; Scribano Gianfranco; Chong Cheng Tung; Thanh Cong Huynh;
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作者单位

Monash Univ Malaysia Sch Engn Jalan Lagoon Selatan Bandar Sunway 47500 Selangor Malaysia;

Monash Univ Malaysia Sch Engn Jalan Lagoon Selatan Bandar Sunway 47500 Selangor Malaysia;

Monash Univ Malaysia Sch Engn Jalan Lagoon Selatan Bandar Sunway 47500 Selangor Malaysia;

Univ Nottingham Malaysia Campus Dept Mech Mat & Mfg Engn Jalan Broga Semenyih 43500 Selangor Malaysia;

Shanghai Jiao Tong Univ China UK Low Carbon Coll Shanghai 201306 Peoples R China;

Vietnam Natl Univ Dept Sci & Technol Ho Chi Minh City Vietnam;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
Biodiesel; Buoyancy; Liftoff; Lifted flame; Tribrachial flame;

机译：生物柴油;浮力;升降机;升起的火焰;斜褐色火焰;

Experimental study on laminar lifted flames of pre-vaporized palm oil biodiesel

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