Effect of Equivalence Ratio on Flame Morphology, Thermal and Emissions Characteristics of Inverse Diffusion Porous Burner

IF 1.1 4区工程技术 Q4 MECHANICS Journal of Applied Fluid Mechanics Pub Date : 2024-06-01 DOI:10.47176/jafm.17.6.2419

A. Dekhatawala, P. V. Bhale, †. R.Shah

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Abstract

The diffusion porous media combustion is one possible way to eliminate the drawbacks of the existing combustion systems. Inverse diffusion flame (IDF) has features of both premixed and non-premixed flames. To integrate the advantages of porous media combustion with IDF, inverse diffusion porous (IDP) medium burner is tested for change in flame morphology and emissions at different equivalence ratio ( ɸ ). The porous media located at the exit of IDF burner has potential to deliver minimum flame length with low emissions. Flame appearance, flame height, flame zones etc. and emissions are experimentally investigated. Methane is used as fuel. Visible flame height is captured digitally and evaluated using ImageJ software. Central plane flame temperature is measured experimentally. CO and NO X emissions are recorded with Testo-340 flue gas analyser. The use of porous media at flame base is beneficiary in terms of achieving better air-fuel mixing and radial diffusion of air-fuel mixture. This reduces flame height with porous medium at all range of ɸ . Increase in ɸ reduces CO and enhances NO X emissions. Porous media reduces CO by 75 % and NO X by 60 %. Inverse diffusion porous medium burner emits lowest emissions in rich conditions.

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等效比对反向扩散多孔燃烧器火焰形态、热能和排放特性的影响

扩散多孔介质燃烧是消除现有燃烧系统弊端的一种可行方法。反向扩散火焰（IDF）同时具有预混火焰和非预混火焰的特点。为了将多孔介质燃烧的优点与 IDF 相结合，反向扩散多孔介质（IDP）燃烧器在不同等效比（ɸ）下进行了火焰形态和排放变化测试。位于 IDF 燃烧器出口处的多孔介质具有提供最小火焰长度和低排放的潜力。实验研究了火焰外观、火焰高度、火焰区等和排放情况。燃料为甲烷。使用 ImageJ 软件对可见火焰高度进行数字捕捉和评估。实验测量了中心平面火焰温度。使用 Testo-340 烟气分析仪记录 CO 和 NO X 的排放量。在火焰底部使用多孔介质有利于实现更好的空气-燃料混合和空气-燃料混合物的径向扩散。这就降低了多孔介质在所有 ɸ 范围内的火焰高度。增加 ɸ 可减少 CO 排放，增加 NO X 排放。多孔介质可减少 75% 的 CO 和 60% 的 NO X。反向扩散多孔介质燃烧器在富油条件下的排放量最低。

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来源期刊

Journal of Applied Fluid Mechanics THERMODYNAMICS-MECHANICS

CiteScore

2.00

自引率

20.00%

发文量

138

审稿时长

>12 weeks

期刊介绍： The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .