Heat transfer and fluid flow characteristics of a pair of interacting dual swirling flame jets impinging on a flat surface

Singh, Parampreet; Chander, Subhash

doi:10.1016/j.ijheatmasstransfer.2018.03.034

Cited by 23 publications

(2 citation statements)

References 45 publications

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“…For turbulent simulation, although large-eddy simulation (LES) is considered to be a promising analysis tool for design applications [34][35][36][37], it is computationally demanding for problems with high Reynolds number (Re > 140,000) [24], and the three-dimensional geometry of the swirl burner is another challenge. In contrast, RANS turbulent models, such as standard k-ε model [30,38,39], RNG k-ε model [40,41] and realizable k-ε model [24,42,43], have been widely implemented in swirling flow simulations. The standard k-ε model assumes that the flow is fully turbulent, and it is suitable to simulate turbulence with high Reynolds number.…”

Section: Models and Simulation Setupmentioning

confidence: 99%

Design optimization and CFD evaluation of a volute swirl burner with central gas supply

Jia

Tang

2020

J Braz. Soc. Mech. Sci. Eng.

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The reasonable design and optimization can be useful tools to solve issues in several industrial applications. Since it is timeconsuming and costly to do the experimental performance assessment using various equipments, computational fluid dynamics (CFD) with suitable models has been widely used due to the good agreement with experiments. This paper presented a universal design calculation method of a volute swirl burner with central gas supply. Then, CFD simulations with standard k-ε model, under non-reacting and reacting conditions, were carried out to verify the design feasibility. The mixedness of gas/air under non-reacting condition was evaluated from the perspective of normal distribution in statistics and checked by the designed excess air factor. A parametric study for various mixing section lengths and outlet diameters of the burner block was conducted to investigate their influence on the central recirculation zone and the temperature distribution. Simulation results show good agreement with empirical formula calculation. The gas and air have been mixed uniformly around the location that is 60 times of the gas orifice diameter. Additionally, an enlarged recirculation zone with increased recirculation strength can be formed with the increasing mixing length and block outlet diameter. In combustion simulation, the longer mixing length improves the flame stabilization but makes the combustion center move to the upstream of the burner due to the strengthened recirculation zone. The larger outlet diameter of the block stretches the flame and moves the high-temperature zone inside the flame to the downstream of the block wall.

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Section: Models and Simulation Setupmentioning

confidence: 99%

Design optimization and CFD evaluation of a volute swirl burner with central gas supply

Jia

Tang

2020

J Braz. Soc. Mech. Sci. Eng.

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“…Singh et al have implemented an experimental and numerical investigation on the flow and heat transfer characteristics of dual swirling flame impingement jets on a flat surface for different separation distance ( H / D h = 2.5‐8) and interjet spacings ( S / D h = 4‐10) with various Reynolds numbers ( Re = 700‐13 000) under stoichiometric conditions. CFD with Fluent software was applied for the isothermal swirling impingement jet simulation.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of heat transfer of impingement system with swap swirl generator

Salman

2019

Heat Trans. Asian Res.

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This article presents the computational fluid dynamic simulation of the heat transfer characteristics induced by a swap swirl air-jet generator on the impingement surface. The study was carried out for conventional and swap twist tape inserts of twisted ratio y = 2.93 with various swap angles (α = 30°, 60°, 90°) at a constant distance of nozzle diameter impingement plate (L = 2D). The results show that the Nusselt number of the swirl impingement air-jet depends on the twisted tape swap angles and airflow rate. The results also showed that the swap angle of 90°gave notable uniform local heat transfer distribution compared with the typical twist tape and other swap twist tapes (α = 30°, 60°). In addition, the predicted results of the local heat transfer coefficient help explain the local turbulence intensity and generation to assist the industrial applications of swirl impingement air-cooling jet.

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Conical coaxial impinging air jets: angle effect on the heat transfer performance

2020

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Heat transfer and fluid flow characteristics of a pair of interacting dual swirling flame jets impinging on a flat surface

Cited by 23 publications

References 45 publications

Design optimization and CFD evaluation of a volute swirl burner with central gas supply

Design optimization and CFD evaluation of a volute swirl burner with central gas supply

Characteristics of heat transfer of impingement system with swap swirl generator

Conical coaxial impinging air jets: angle effect on the heat transfer performance

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