Optimization of a premixed cylindrical burner for low pollutant emission

Zhao, Dongfang; Liu, Fengguo; You, Xue-yi; Zhang, Rui; Zhang, Binlong; He, Gui-Long

doi:10.1016/j.enconman.2015.04.039

Cited by 26 publications

(5 citation statements)

References 22 publications

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“…[2][3][4] Moreover, bladeless turbines may be put into operation in applications such as bio-fuel power generation systems, heat recovery systems, co-generation systems, solar energy systems and waste heat recovery systems. 1,[5][6][7] This article describes the design and construction of an experimental bladeless turbine system using an incompressible working medium and studies how the performance parameters of the turbine change with respect to one another and under what conditions the turbine runs most efficiently through a series of experiments. In this article, numerical simulation is carried out for some experimental conditions, and the main causes of loss in the turbine are analysed.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on bladeless turbine using incompressible working medium

Wang

Yao

et al. 2017

Advances in Mechanical Engineering

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The bladeless turbine has a promising future as a new power generation system. To explore the operating characteristics of the turbine, a bladeless turbine experimental platform with an incompressible working medium was designed and built. The relationships among performance parameters were analysed in experiments, and studies were conducted on the flow characteristics of the working medium inside the turbine using numerical simulation software. The causes of entry and exit losses were analysed. The data acquired by simulation were consistent with the result of calculations using the partial loss model developed in this article, which means that this model is capable of calculating the partial loss of a bladeless turbine and is thus suitable for the design and optimization of bladeless turbines.

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Section: Introductionmentioning

confidence: 99%

Experimental study on bladeless turbine using incompressible working medium

Wang

Yao

et al. 2017

Advances in Mechanical Engineering

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“…In particular, the entire mixing degree of air and fuel exhibits superior results when compared to that of the conventional nozzle-mixed burner. Zhao et al [14] investigated the effect of mixing distance on the mixing process and combustion of the double-cone burner. They obtained that the dimensionless mixing distance had a significant impact on the fuel mixing effect and then affected the high-temperature zone position and emissions using numerical methods.…”

Section: Resultsmentioning

confidence: 99%

Experimental Investigation of Air–Fuel Mixing Effects on Flame Characteristics in a Direct fired Burner

Lee¹,

Kim²,

Hong³

2021

Energies

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The length and pattern of air–fuel mixing plays a significant role in the uniformity, flame temperature, and emission characteristics, which can lead to a superior product quality in a non-oxidizing direct fired burner for a cold-rolled steel plate furnace. In this study, a diffusion-flame-type burner and partially-premixed-type burner were experimentally investigated to understand their effects on flame shape, flame temperature, and exhaust gas characteristics. With this aim, fuel nozzle size, nozzle hole number, fuel injection angle, and mixing distance of fuel and air were varied during the experiments. Computational fluid dynamics simulations were also performed to investigate the air–fuel mixing state for a nozzle-mixed burner and a partially-premixed burner. The results show that the flame temperature of the partially-premixed burner increases by up to 26 °C on average compared to that of the nozzle-mixed burner. It is also shown that the mixing distance plays an important role in the flame temperature of the partially-premixed burner. In addition, the residual oxygen concentration and volume ratio of CO/CO2 in the flue gas of the partially-premixed burner exhibit lower concentrations compared to those of the diffusion flame burner.

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“…With the development of computer, the numerical simulation by CFD is becoming an attractive method due to its high flexibility, powerful information visualization and low-cost application. Many studies [24][25][26][27] have demonstrated that CFD simulations with appropriate models have good agreement with the experiments, in both flow-field behavior and combustion characteristics.…”

Section: Introductionmentioning

confidence: 91%

“…Then, the small orifice number ( N s ) can be achieved from its area, i.e., the difference between the area of all orifices and the large orifices (Eqs. [25][26][27].…”

Section: Dimensions Of Jet Orificesmentioning

confidence: 99%

“…Ouali et al [30] carried out simulations to analyze the effect of methane-air equivalence ratio on thermal NO formation. In addition, Zhao et al [25] used a random sampling method to evaluate mixedness through the samples, which was randomly extracted from the experimental database. Zhu et al [24] carried out an experimental and numerical study on a kerosene-fueled swirl laboratory combustor.…”

Section: Introductionmentioning

confidence: 99%

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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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Optimization of a premixed cylindrical burner for low pollutant emission

Cited by 26 publications

References 22 publications

Experimental study on bladeless turbine using incompressible working medium

Experimental study on bladeless turbine using incompressible working medium

Experimental Investigation of Air–Fuel Mixing Effects on Flame Characteristics in a Direct fired Burner

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

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