不同喷射速度下甲烷和纳米颗粒喷射特性的数值分析

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS Journal of Energy Resources Technology-transactions of The Asme Pub Date : 2023-04-20 DOI:10.1115/1.4062379
A. A., Karthikeyan L, D. Sahoo, Mallika M, Subramaniam Prakash
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引用次数: 0

摘要

数值模拟的应用迅速增加,以测试先进燃料技术领域的许多创新概念。利用数值工具实现多种化合物的相互作用是可行的选择。因此,在本研究中,进行了数值模拟,以评估喷雾速度对各种化合物质量分数的影响。概念数值域是使用ANSYS-CFD由两个入口(如空气和CH4)的混合物构建的。除了CH4之外,使用流体体积法将纳米颗粒注入相同的入口中。燃料以100 m/s、125 m/s、150 m/s和175 m/s的不同速度喷射。这里产生了两个区域,一个是氧化剂,另一个是具有纳米颗粒的CH4。在整个试验过程中,纳米粒子的浓度一直保持不变。为了了解燃料撞击特性和燃烧室中化学反应速率的影响,已经捕获了一系列图像轮廓。从研究结果中可以明显看出,当CH4喷射速度较高时,燃烧室内涡流的形成较高。此外,燃烧室内的湍流强度高,这延迟了反应时间,并确实导致了更高的燃烧。
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Numerical analysis of spray characteristics with methane and nanoparticles under various injection velocities
Utilization of the numerical simulations has been increased rapidly to test many innovative concepts in the field of advanced fuel technologies. Implementation of many chemical compound's interaction is viable option by the numerical tools. Hence in this current study, the numerical simulation has been performed to evaluate the effect of spray velocities on the mass fraction of various compounds. The conceptual numerical domain has been constructed with mixture of two inlets such as Air and CH4using ANSYS-CFD. In addition to the CH4, the nanoparticles were injected in the same inlet using volume of fluid method. The fuel was injected at different velocities of 100 m/s, 125 m/s, 150 m/s and 175 m/s. Here two sections of the domains are created, one of the oxidizers and another for the CH4 with nanoparticles. Throughout the entire trails run the nanoparticle concentration has been maintained constant. A series of the pictorial contours has been captured to understand the influence of the fuel impinging characteristics and the rate of the chemical reactions in the combustion chamber. Form the findings it is evident that, when the CH4 injection velocity is higher the formation of the vortices was high inside the combustion chamber. Further, the turbulence intensity inside the chamber is high which delays the reaction time and which leads to the higher combustion indeed.
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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