Numerical study on combustion characteristics and heat transfer enhancement of the micro combustor embedded with Y-shaped fin for micro thermo-photovoltaic system

Zhang, Chenghua; Yan, Yunfei; Shen, Kaiming; Gao, Wei; He, Ziqiang; Xue, Zongguo; Li, Jianbo

doi:10.1016/j.applthermaleng.2022.118427

Cited by 31 publications

(4 citation statements)

References 48 publications

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“…Variations in combustor diameter can result in differences in reactant flow rates, heat loss, and differences in the intensity of preheating of the fuel by the wire mesh in each diameter variation. The larger diameter of the combustor will decrease the speed of the reactants and increase the fuel residence time [36], [37]. When the speed of the reactants decreases, the reactants to supply the combustion reaction decrease and cause the flame to become thinner.…”

Section: Results Dan Discussionmentioning

confidence: 99%

“…The temperature increase is due to decreased heat loss and increased fuel preheating intensity. Even though it is influenced by the decreasing velocity of the reactants so that it can reduce the temperature of the flame and the temperature of the combustor wall, the speed of the reactants is not proportional to the decreased heat loss and the increased preheating intensity of the fuel [36], [45]. While the temperature of the flame and the temperature of the combustor wall from 5 mm to 6 mm diameter of the combustor decreased.…”

Section: Automotive Experiences 107mentioning

confidence: 99%

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Characterization of Combustion in Cylindrical Meso-Scale Combustor with Wire Mesh Flame Holder as Initiation of Energy Source for Future Vehicles

Sanata,

Ilminnafik,

Asyhar

et al. 2024

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The research aims to analyze and reveal combustion characteristics in a Cylindrical Meso Scale (CMS) Combustor with a wire mesh flame holder as a reference for designing a compact, efficient, and high-density energy source for future vehicles. This experiment analyzes the combustion ’s of a butane gas (C4H10)-air mixture in a cylindrical meso-scale (CMS) combustor with the addition of wire mesh flame holder on the stability of the combustion flame, as initiation of future vehicle energy source. The diameter of the CMS combustor with wire mesh flame holder is varied to give an idea of the effect of heat loss on the combustion flame's characteristics. The results show that the wire mesh as a flame holder is essential in the combustion stabilization mechanism. A stable flame can be stabilized in a CMS combustor with wire mesh. Variations in the diameter of the CMS combustor will result in variations in the surface-to-volume ratio, heat loss, and contact area of the wire mesh flame holder. At a large diameter, it produces the characteristics of a combustion flame with a more stable flame stability limit than a smaller diameter, a dimmer flame visualization than a smaller diameter at the same air and fuel discharge, a more distributed flame mode map area than the smaller diameter, lower flame temperature and combustor wall temperature than the smaller diameter, and relatively higher energy output than the smaller diameter.

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Section: Results Dan Discussionmentioning

confidence: 99%

Section: Automotive Experiences 107mentioning

confidence: 99%

Characterization of Combustion in Cylindrical Meso-Scale Combustor with Wire Mesh Flame Holder as Initiation of Energy Source for Future Vehicles

Sanata,

Ilminnafik,

Asyhar

et al. 2024

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“…Electrochemical polarization was ignored due to the ultra-fast dynamic of the liquid-liquid interface [25]. Electrochemical reaction heat was also neglected [26].…”

Section: Overviewmentioning

confidence: 99%

Enhancing the Discharge Performance of Liquid Metal Batteries through External Magnetic Fields

Zhou,

Jiang,

Wang

2024

Preprint

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Liquid metal batteries are considered a competitive alternative for grid-level stationary energy storage. In this study, we investigated the effects of external magnetic fields on the charge and discharge performance of this all-liquid battery composed of three layers of fluids. Experimental results indicate that, at the current density of 500 mA cm -2 , the application of a 100 mT magnetic field increases the discharge voltage by 34.64% compared to the case without a magnetic field. At a higher current density of 1000 mA cm -2 , applying a 50 mT magnetic field results in a 74.5% increase in discharge voltage, demonstrating significant effects. Furthermore, we develop a numerical model using a multiphysics simulation software to uncover the underlying mechanisms. The Lorentz force generated by the interaction of the external magnetic field and discharge current induces a swirling flow in the phi direction. At sufficiently high flow velocities, turbulent flow with a notable |z| direction component is formed, assisting the transport of Li atoms in the positive electrode, reducing concentration polarization, and thereby enhancing the discharge voltage.

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“…In recent years, the urgent research point in micro-combustion is the resolution of two key issues: flame instability and conversion efficiency. The micro-combustor is primarily based on a tube and plate as the basic model, and various optimization measures have been employed to address these challenges [ [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] ]. Ziqiang He et al [ 28 ] conducted a comprehensive investigation into an integrated thermoelectric generation process based on the disc-combustor with plates.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of premixed n-heptane/air combustion in micro tube with internal channel optimization

Huang,

Zeng,

Wan

et al. 2024

Heliyon

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Numerical study on combustion characteristics and heat transfer enhancement of the micro combustor embedded with Y-shaped fin for micro thermo-photovoltaic system

Cited by 31 publications

References 48 publications

Characterization of Combustion in Cylindrical Meso-Scale Combustor with Wire Mesh Flame Holder as Initiation of Energy Source for Future Vehicles

Characterization of Combustion in Cylindrical Meso-Scale Combustor with Wire Mesh Flame Holder as Initiation of Energy Source for Future Vehicles

Enhancing the Discharge Performance of Liquid Metal Batteries through External Magnetic Fields

Numerical simulation of premixed n-heptane/air combustion in micro tube with internal channel optimization

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