Analysis of LPG diffusion flame in tube type burner

Vipul Patel; Rupesh Shah

doi:10.15282/jmes.13.3.2019.05.0431

Authors

Vipul Patel Department of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
Rupesh Shah Faculty of Mechanical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India Phone: 0261-2259571; Fax: 0261-2227334

DOI:

https://doi.org/10.15282/jmes.13.3.2019.05.0431

Keywords:

Diffusion flame, flame appearance, flame stability, soot free length fraction, CO emission

Abstract

The present research aims to analyse diffusion flame in a tube type burner with Liquefied petroleum gas (LPG) as a fuel. An experimental investigation is performed to study flame appearance, flame stability, Soot free length fraction (SFLF) and CO emission of LPG diffusion flame. Effects of varying air and fuel velocities are analysed to understand the physical process involved in combustion. SFLF is measured to estimate the reduction of soot. Stability limits of the diffusion flame are characterized by the blowoff velocity. Emission characteristic in terms of CO level is measured at different equivalence ratios. Experimental results show that the air and fuel velocity strongly influences the appearance of LPG diffusion flame. At a constant fuel velocity, blue zone increases and the luminous zone decreases with the increase in air velocity. It is observed that the SFLF increases with increasing air velocity at a constant fuel velocity. It is observed that the blowoff velocity of the diffusion flame increases as fuel velocity increases. Comparison of emission for flame with and without swirl indicates that swirl results in low emission of CO and higher flame stability. Swirler with 45° vanes achieved the lowest CO emission of 30 ppm at Φ = 1.3.

References

Arya PK, Tupkari S, Satish K, Thakre GD, Shukla BM. DME blended LPG as a cooking fuel option for Indian household: A review. Renewable and Sustainable Energy Reviews. 2016; 53:1591–1601.

Yusaf T, Noor MM, Wandel AP. MILD combustion: The future for lean and clean combustion. International Conference on Mechanical Engineering Research, University Malaysia, Pahang. 2013.

Kiran DY, Mishra DP. Experimental studies of flame stability and emission characteristics of simple LPG jet diffusion flame. Fuel. 2007; 86:1545-1551.

Vanquickenborne L. Tiggelen A. The stabilization mechanism of lifted diffusion flames. Combustion and Flame. 1966; 10:59-69.

Pitts William M. Assessment of theories for the behaviour and blowout of lifted turbulent jet diffusion flames. Symposium (International) on Combustion. 1989; 22:809-816.

Mishra DP, Kiran DY. Experimental studies of bluff-body stabilized LPG diffusion flames. Fuel. 2009; 88:573-578.

Kalghatgi G T. Blowout stability of gaseous jet diffusion flames. Part 1: In still air. Combust Science and Technology. 1981; 26:233–239.

Cha MS, Chung SH. Characteristics of lifted flames in nonpremixed turbulent confined jets. Symposium (International) on Combustion. 1996; 26:121-128.

Miake-Lye RC, Hammer JA. Lifted turbulent jet flames: A stability criterion based on the jet large-scale structure. Symposium (International) on Combustion. 1989; 22:817-824.

Santos A, Costa M. Re-examination of the scaling laws for NOx emissions from hydrocarbon turbulent jet diffusion flames. Combustion and Flame. 2005; 142:160-169.

Rokke NA, Hustad JE, Sonju OK, Williams FA. Scaling of nitrogen oxide emissions from buoyancy-dominated hydrocarbon turbulent jet diffusion flames. Symposium (international) on combustion. 1992; 24:385–393.

Kang Y, Wanga Q, Lu X. Experimental and theoretical study on the flow, mixing, and combustion characteristics of dimethyl ether, methane, and LPG jet diffusion flames. Fuel Processing Technology. 2015; 129: 98-112.

Mishra DP, Rahman A. An experimental study of flammability limits of LPG/air mixtures. Fuel. 2003; 82:863–866.

Laphirattanakul P, Laphirattanakul A, Charoensuk J. Effect of self-entrainment and porous geometry on stability of premixed LPG porous burner. Applied Thermal Engineering. 2016; 103:583–591.

Chen S, Zhaob H, Taya KJ, Tariquea AA. Numerical study of a methane jet diffusion flame in a longitudinal tube with a standing wave. Energy Procedia. 2017; 105:1539–1544.

Sawarkar P, Sundararajan T, Srinivasan K. Effects of externally applied pulsations on LPG flames at low and high fuel flow rates. Applied Thermal Engineering. 2017; 111:1664–1673.

Galletti C, Parente A, Tognotti L. Numerical and experimental investigation of a mild combustion burner. Combustion and Flame. 2007; 151:649–664.

Noor MM, Wandel AP, Yusaf TF. Numerical investigation of influence of air and fuel dilution for open furnace MILD combustion burner. Southern Regional Engineering Conference, Toowoomba, Australia 2012.

Noor MM, Wandel AP, Yusaf TF. The development of MILD combustion open burner experimental setup. International Conference on Mechanical Engineering Research, Pahang, Malaysia, 2013.

Gulder OL, Snelling DR. Formation and temperature of soot particles in laminar diffusion flames with elevated temperatures. The Combustion Institute. 1990; 1509-1515.

Aravind B, Kishore VR, Mohammad A. Combustion characteristics of the effect of hydrogen addition on LPG-air mixtures. Internation Journal of Hydrogen Energy. 2015; 40:16605- 16617.

Gulder OL. Soot formation in laminar diffusion flames at elevated temperatures. Combustion and flame. 1992; 88:75-82.

Frenklach M, Wang H. Detailed modeling of soot particle nucleation and growth. Symp. (Int.) Combustion. 1991; 23(1):1559–1566.

Wang H, Du DX, Sung CJ, Law CK. Experiments and numerical simulation on soot formation in opposed-jet ethylene diffusion flames. Symp. (Int.) Combust. 1996; 26 (2):2359–2368.

Saini Rohit, De Ashoke. Assessment of soot formation models in lifted ethylene/air turbulent diffusion flame. Thermal Science and Engineering Progress. 2017; 3:49–61.

Naccarato F, Potenza M, Risi A. Simultaneous LII and TC optical correction of a low-sooting LPG diffusion flame. Measurement. 2014; 47:989–1000.

Liu F, Hua Y, Wu H, Lee C, He X. An experimental study on soot distribution characteristics of ethanol-gasoline blends in laminar diffusion flames. Journal of the Energy Institute. 2017; xxx:1-12

Soussi JP, Demarcoa R, Consalvib JL, Liuc F, Fuentesa A. Influence of soot aging on soot production for laminar propane diffusion flames. Fuel. 2017; 210: 472–481.

P. Kumar, Mishra D P. Experimental investigation of laminar LPG–H2 jet diffusion flame. International Journal of Hydrogen Energy. 2008; 33:225-231.

Wu L, Kobayashi N, Li Z, Huang H. Experimental study on the effects of hydrogen addition on the emission and heat transfer characteristics of laminar methane diffusion flames with oxygen-enriched air. International journal of hydrogen energy. 2016; 41:2023-2036.

Mishra DP, Kumar P. Effects of N2 gas on preheated laminar LPG jet diffusion flame. Energy Conversion and Management. 2010; 51:2144-2149.

Hou S-S, Lee C-Y, Lin T-H. Efficiency and emissions of a new domestic gas burner with a swirling flame. Energy Conversion and Management. 2007; 48:1401-1410.

Li HB, Wong T, Leung CW. Thermal performances and CO emissions of gas-fired cooker-top burners. Applied Energy. 2003; 83:1326-1338.

Kang Y, Wanga Q, Lu X, Wanb H, Ji X, Wang H, Guo Q, Yan J, Zhou J. Experimental and numerical study on NOx and CO emission characteristics of dimethyl ether/air jet diffusion flame. Applied Energy. 2015; 149:204–224.

Lilley DG. Swirl flows in combustion: A review. AIAA journal. 1971; 15:1063-1078.

Syred N, Chigier NA and. Beer J M. Flame Stabilization in Recirculation Zones of Jets with Swirl. Thirteenth International Symposium on Combustion. 1971; 13: 617-624.

Halpin JL. Swirl generation and recirculation using radial swirl vanes, ASME journal. International gas turbine and aero engines congress, Ohio. 1993.

Jeong YK, Jeon HC, Chang YJ. Effect of a swirling and recirculating flow on the combustion characteristics in non-premixed flat flames. KSME International Journal. 2004; 18:499-512.

Chen RH, Driscoll JF. The Role of the Recirculation Vortex in Improving Fuel-Air Mixing within Swirling Flames. Twenty-second symposium on combustion. 1989; 22:531-540.

Raj RT, Ganesan V. Experimental study of recirculating flows induced by vane swirler. Indian journal of engineering and material sciences. 2009; 16:14-22.

Samantaray BB, Mohanta CK. Analysis of industrial flame characteristics and constancy study using image-processing technique. Journal of Mechanical Engineering and Sciences. 2015; 9:1604-1613.

Mahesh S, Mishra D P. Flame stability and emission characteristics of turbulent LPG-IDF in a backstep burner. Fuel. 2008; 87:2614-2619.