Improvement of Emissions and Burning Limits in Burner Combustion using an Injector on the Concept of Fuel-water Internally Rapid Mixing

Yatsufusa, Tomoaki; Kidoguchi, Yoshiyuki; Nakagawa, Daisuke

doi:10.17265/1934-8975/2014.01.002

Cited by 11 publications

(24 citation statements)

References 5 publications

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“…Design of Multi-Circular Jet (MCJ) is referred to the test rig performed by Yasufusa and Kidouchi [4]. The injector uses swirl to generate turbulence.…”

Section: Methodsmentioning

confidence: 99%

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Computational Fluid Dynamics: Flow Analysis on The Effect of Different Jet Orifice Angle Multi Circular Jet for Fuel and Air Mixing

Ridzwan Kamaruddin,

Syabillah Sulaiman,

Amir Khalid

et al. 2023

CFDL

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The mixing of fuel and air plays a major role in the spray and flame behavior, hence affecting the combustion performance and emissions of the internal mixing air-assisted atomizers. Air-assisted atomizers are introduced to counter the low-pressure differential of a simplex nozzle, which reduces the atomization quality. The present study aims to determine the effects of Multi Circular Jet (MCJ) plates on the geometrical configurations of internal flows in mixing chamber and the internal flow of plate 3 using different properties of fuel. In this study, the realizable k-ε turbulence model, specifically designed for strongly swirling flows, is validated through numerical simulations. The turbulence model selected is a type of Reynolds averaged Navier-Stokes (RANS) model called the k-ε model. The MCJ plates provide the primary air entrance into the mixing chamber. Additionally, it acts as a turbulence generator and can be adjusted to alter the flow of fuel and air mixtures in a mixing chamber. The study compares several MCJ geometries in terms of pressure, speed, turbulent kinetic energy, and volume fraction and compares the performances of diesel and Crude Palm Oil (CPO) B30 biodiesel fuels. The findings imply that CPO B30 biodiesel has superior atomization and mixing due to its higher density and turbulent kinetic energy. CPO B30 biodiesel was compared to Diesel in terms of maximum pressure, average speed, turbulent kinetic energy per unit mass, and volume fraction. The results indicate that CPO B30 has lower pressure and higher velocity than Diesel, suggesting better fuel atomization and mixing. The higher density of CPO B30 leads to increased turbulent kinetic energy, improving fuel-air mixing inside the combustion chamber. The study demonstrates that the use of MCJ plates can enhance mixing in a mixing chamber. In addition, MCJ plates show the ability to control the spray and atomization. The findings of this study contribute to a better understanding of the relationships between geometry and fuel-air mixing, as well as the characteristics of the internal mixing air-assisted atomizer, which will lead to future burner system improvements.

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“…Design of Multi-Circular Jet (MCJ) is referred to the test rig performed by Yasufusa and Kidouchi [4]. The injector uses swirl to generate turbulence.…”

Section: Methodsmentioning

confidence: 99%

“…Many studies have suggested factors that influence the combustion and emissions of the burner. The physical and chemical properties of the fuel [2], spray characteristics [3], and fuel-air mixing [4,5], were discovered to have a significant impact on the performance of the burner.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics: Flow Analysis on The Effect of Different Jet Orifice Angle Multi Circular Jet for Fuel and Air Mixing

Ridzwan Kamaruddin,

Syabillah Sulaiman,

Amir Khalid

et al. 2023

CFDL

View full text Add to dashboard Cite

show abstract

“…It can be used in many applications such as fuel in automotive and burner system. However, Soot-NOx trade off plays as a key element in controlling the combustion process in external burner system that can cause serious problems on the environment and human health [1][2][3][4]. Therefore, the improvement of diesel combustion with controlling of combustion process is urgently required.…”

Section: Introductionmentioning

confidence: 99%

“…The simplest method to control the emission is by adding water in diesel, which is also known as diesel-water emulsion process. Diesel-water emulsion is the simpler and cheapest way to reduce the emission of combustion [3]. Several attractive benefits are associated with the adoption of the diesel-water emulsified.…”

Section: Introductionmentioning

confidence: 99%

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Spray Characteristic of Diesel-Water Injector for Burner System

Khalid

Amirnordin

Lambosi

et al. 2013

AMR

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Abstract. NOx and PM are the major product results from the combustion of diesel either in internal combustion engine or external burner system. Thus, the emulsification concept from diesel and water were studied with focusing in controlling of combustion process in order to minimize the harmful emission. The main purpose of this research is to investigate the effects of diesel-water emulsification on mixture formation, burning process and flame development in burner system. The studed parameters include equivalent ratio, water content in diesel-water emulsification and spray characteristics such as spray penetration length, spray angle and spray area. The spray image of different diesel-water ratio and equivalence ratio can be investigated by direct photography method with a digital camera. The real spray images with the time changes was analyzed and compared with based diesel fuel. The results show that the higher of water contents due to higher viscosity influences the higher penetration length and lower spray angle thus predominantly the lower combustible mixture and lower the flame penetration. IntroductionThe growth of the economy and world population have driven the use of energy and natural resources. Diesel as one of the natural resources is being consumed heavily in the world demand. It can be used in many applications such as fuel in automotive and burner system. However, SootNOx trade off plays as a key element in controlling the combustion process in external burner system that can cause serious problems on the environment and human health[l-41. Therefore, the improvement of diesel combustion with controlling of combustion process is urgently required. For that reason, the study in fuel-air mixing and spray characteristics are necessary before the combustion process takes place. The simplest method to control the emission is by adding water in diesel, which is also known as diesel-water emulsion process. Diesel-water emulsion is the simpler and cheapest way to reduce the emission of combustion [3]. Several attractive benefits are associated with the adoption of the diesel-water emulsified. The heat absorption by water vaporization causes a decrease of local adiabatic flame temperature. During this phenomenon, water can weakens the peak temperature of luminous flames during diffusion process thus decrease the NO, emissions [5].In addition, the fuel is vaporized to a small particular after the explosion of water droplets, this is named as micro-explosion phenomenon [3-41. Micro-explosion is occurs during the mixing of water and fuel, it's made up of two or more liquids with relatively large differences between their boiling temperatures. Heat absorption by water vaporization causes a decrease of local adabatic flame temperature and reduction of peak flame temperature that associated with lower the PM emissions and produces less toxic emission. Nevertheless, another effect of water emulsification is it tends to increase the surface tension and viscosity of the fuel, which makes the fuel hard to break u...

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A Review of the Concept of Fuel-Water Internally Rapid Mixing Injector in Burner System

Sies

Mustaffa

Zakaria

et al. 2013

AMM

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This paper reviews the effects of premix fluids between biodiesel, air, and water for external combustion especially open burner. During burning process, biodiesel combustion involves the fuel-air mixing characteristic such as oxidation stability, stoichiometric point, bio-fuel composition, antioxidants and viscosity that influences more NOx emissions than diesel fuel. The strategies to reduce NOx emission are acquired with water additional in biodiesel fuel mixing during early stage of burning process. The method to mix biodiesel-water with injector was acquired in burner system. A vast majority of author reported that the variation in mixing of blending biodiesel ratio and water was found to enhance the burning process and mixture formation thus predominantly reducing the NOx emissions.

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Improvement of Emissions and Burning Limits in Burner Combustion using an Injector on the Concept of Fuel-water Internally Rapid Mixing

Cited by 11 publications

References 5 publications

Computational Fluid Dynamics: Flow Analysis on The Effect of Different Jet Orifice Angle Multi Circular Jet for Fuel and Air Mixing

Computational Fluid Dynamics: Flow Analysis on The Effect of Different Jet Orifice Angle Multi Circular Jet for Fuel and Air Mixing

Spray Characteristic of Diesel-Water Injector for Burner System

A Review of the Concept of Fuel-Water Internally Rapid Mixing Injector in Burner System

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