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Combustion fundamentals of pyrolysis oil based fuels

机译:热解油基燃料的燃烧原理

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The combustion behavior of emulsions of pyrolysis oil in commercial diesel oil was studied. The emulsions were different in terms of concentration and size of the dispersed phase. The study was carried out in a single droplet combustion chamber. The size of droplets varied between 400 mu m and 1200 mu m. They were suspended to a bare thermocouple and, hence, their temperature during combustion was measured. High-speed digital shadowgraphy was used to follow droplets evolution. The main features of the droplet combustion were recognized. The general combustion behavior of emulsions is intermediate with respect to pure PO and commercial diesel oil. Emulsion droplets underwent strong swelling and microexplosion phenomena. However, under the investigated conditions, the microexplosions were ineffective in destroying droplets. The size distribution of the dispersed PO droplets in the range 3-10 mu m was not effective nor for determining the overall thermal behavior nor for the efficacy of the microexplosions. The homogeneous combustion phase resulted identical for emulsions and diesel oil despite the emulsions composition (i.e., concentration of oil, surfactant and co-surfactant, as well as the size of the oil droplets in the emulsion) and the different structure of the flame and also its time and spatial evolution. (c) 2006 Elsevier Inc. All rights reserved.
机译:研究了热解油在商用柴油中的乳化液的燃烧行为。乳液在分散相的浓度和尺寸方面是不同的。该研究在单个液滴燃烧室中进行。液滴的大小在400微米至1200微米之间变化。将它们悬挂在裸露的热电偶上,因此可以测量它们在燃烧期间的温度。高速数字阴影照相术被用来追踪液滴的演变。液滴燃烧的主要特征得到了认可。相对于纯PO和商业柴油,乳液的一般燃烧行为是中等的。乳液液滴经历了强烈的溶胀和微爆炸现象。然而,在研究条件下,微爆炸在破坏液滴方面无效。分散的PO液滴在3-10μm范围内的尺寸分布对于确定总体热行为或微爆炸的效力均无效。尽管乳化液的成分(即油,表面活性剂和助表面活性剂的浓度以及乳化液中油滴的大小)以及火焰的结构不同,但均相燃烧阶段对于乳化液和柴油仍是相同的它的时间和空间演变。 (c)2006 Elsevier Inc.保留所有权利。

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