Non-Premixed Liquid Fuel Air Flame in a Miniature Combustor with Modified Flow Aerodynamics

IF 2.4 Q2 MULTIDISCIPLINARY SCIENCES Smart Science Pub Date : 2021-12-16 DOI:10.1080/23080477.2021.2015819
Nur Kyairatul Syafinie Abdul Majid, Aqil Asnawi Abu Hanapah, M. R. Saad, H. Mohd Faizal, Azam Che Idris, Seyed Ehsan Hosseini, H. Koten, Mohd Rosdzimin Abdul Rahman
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引用次数: 3

Abstract

ABSTRACT This study determines the effect of flow aerodynamics modification on the combustion characteristics of a new miniature combustor. The n-heptane was injected into the combustor at a flow rate of 1.0 ml/min to 2.5 ml/min, and the airflow rate varied between 7.0 l/min and 20.0 l/min at a successive fuel flow rate to maintain the equivalence ratio. The flame was confined in the combustor in the lean fuel regime. The modified combustor stabilized and sustained the flame at a high Reynolds number. This study used a numerical simulation of the isothermal flow to explain the results of the experiment. The recirculation zone at the sidewall bottom chamber extends the combustor operating regime to the higher Reynolds number. This recirculation balanced the flame propagation and flow velocity at higher Reynolds numbers and strengthen the flame anchoring inside the bottom chamber. The modified flow aerodynamics enhanced the combustion sustainability of the miniature combustors. It is a critical parameter in designing new combustors with a wide range of operation regimes at a small scale. GRAPHICAL ABSTRACT
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改进流动空气动力学的微型燃烧器中的非预混液体燃料-空气火焰
本研究确定了流动空气动力学修改对新型微型燃烧器燃烧特性的影响。正庚烷以1.0毫升/分钟至2.5毫升/分钟的流速注入燃烧器,并且在连续的燃料流速下气流速率在7.0升/分钟至20.0升/分钟之间变化以保持当量比。在贫燃料状态下,火焰被限制在燃烧器中。改进后的燃烧器使火焰稳定并维持在高雷诺数。本研究使用等温流动的数值模拟来解释实验结果。侧壁底室处的再循环区将燃烧器的运行状态扩展到较高的雷诺数。这种再循环平衡了较高雷诺数下的火焰传播和流速,并加强了底部燃烧室内的火焰锚定。改进的流动空气动力学增强了微型燃烧器的燃烧可持续性。它是设计具有小规模宽范围运行工况的新型燃烧器的关键参数。图形摘要
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来源期刊
Smart Science
Smart Science Engineering-Engineering (all)
CiteScore
4.70
自引率
4.30%
发文量
21
期刊介绍: Smart Science (ISSN 2308-0477) is an international, peer-reviewed journal that publishes significant original scientific researches, and reviews and analyses of current research and science policy. We welcome submissions of high quality papers from all fields of science and from any source. Articles of an interdisciplinary nature are particularly welcomed. Smart Science aims to be among the top multidisciplinary journals covering a broad spectrum of smart topics in the fields of materials science, chemistry, physics, engineering, medicine, and biology. Smart Science is currently focusing on the topics of Smart Manufacturing (CPS, IoT and AI) for Industry 4.0, Smart Energy and Smart Chemistry and Materials. Other specific research areas covered by the journal include, but are not limited to: 1. Smart Science in the Future 2. Smart Manufacturing: -Cyber-Physical System (CPS) -Internet of Things (IoT) and Internet of Brain (IoB) -Artificial Intelligence -Smart Computing -Smart Design/Machine -Smart Sensing -Smart Information and Networks 3. Smart Energy and Thermal/Fluidic Science 4. Smart Chemistry and Materials
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