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Analytical and Numerical Analysis of Micro Combustor for Gas Turbine Engine
Objective: For power generation through micro gas turbine, the micro combustion chamber is essential component. Due to higher flammability limits and less reaction time as compare to hydrocarbon fuel, hydrogen is selected as a fuel. For designand fabrication of micro combustion chamber analytical and numerical analysis is required to study. Analysis with variations in reactant inlet temperature from lean condition (Equivalence ratio = 0.1) to fuel rich condition (equivalence ratio = 1.2) was taken. The optimized results obtained from analytical study are used as designed parameters for design of micro combustor. Methods Statistical Analysis: O’Conaire, GRI Mech 3.0 and O’Conaire reaction mechanism with Zeldovich NO are used for hydrogen or air combustion analytical studies. O’Conaire mechanism with Zeldovich NO is used in computational fluid dynamic studies using ANSYS CFX software. For numerical study, the BVM partial premixed combustion model is used for calculation of 41 reaction and 11 reactive species with Zeldovich NO. Finding: For three different chemical reaction mechanisms, the flame temperatures at different equivalence ratio were evaluated. The increase in the equivalence ratio from 0.1 to 1.2 resulted in increase of the flame temperature up to the stoichiometric condition and thereafter decreases. Results of simulation show good agreement with analytical studies. At 0.132 equivalence ratio (ɸ), flame temperature is around 670 K, deduce from both chemical kinetics and CFD simulation. Application/Improvement: Combustion process is effectively work at lower equivalence ratio in micro scale combustor which is summarized after analytical and numerical analysis. At lower equivalence ratio, heat losses are reduced which results in higher efficiency of the micro combustor in gas turbine engine during experimental work. The main application of electricity generation via the heat released by the combustor using the Seebeck and Peltier effect.
Equivalence Ratio, Flame Temperature, GRI Mech 3.0 Mechanism, Micro Combustion, O’Conaire Mechanism
- Chigier N, Gemci T. A review of micro propulsion technology, 41ST Aerospace Sciences Meeting and Exhibit. 2003. p. 1.
- Carlos Fernandez-Pello A. A Micropower generation using combustion: issues and approaches, Proceedings of the Combustion Institute. 2002; 29(1): 883–99.
- Waitz. Combustion for Micro-Gas Turbine Engines, Proceeding of the ASME Aerospace division. 1996. p. 52.
- Gaikwad V, Deshmukh S, Bhojwani V. A review on small scale combustor and power generator, International Engineering Research Journal (IERJ). 2015; 2: 1711–16.
- Lee D H, Kwon S. Heat transfer and quenching analysis of combustion in micro combustion vessel. Journal of Micro Mechanics and Micro Engineering. 2002; 12(5): 670–76.
- Norton D G, Vlachos D G. Combustion characteristics and flame stability at the micro scale. Chemical Engineering Science. 2003; 58(21): 4871–82.
- Sitzki L, Borer K, Schuster E, Ronney P D, Wussow S. Combustion in Micro-scale Heat Re-circulating Burners. Proc. of 3rd Asia-Pacific Conference on Combustion; Korea; 2001. p. 1–4.
- Shabanian S R, et al. CFD study on hydrogen – air premixed combustion in a micro scale chamber. Iran Journal Chemistry Chemical Engineering. 2010; 29(4): 161–72.
- Mehra A, Waitz I A. Development of a hydrogen combustor for a micro fabricated gas turbine engine, MIT: USA; 2000. p. 1–7.
- Yuasa S, Shigeta M, et al. Combustion performance of lean premixed type combustors for a hydrogen fuelled micro gas turbine. Proceeding of Yokohama International Gas Congress; Japan; 1995. p. 347–52.
- Lefebvre A H. Gas Turbine Combustion, Second Edition. USA: Taylor and Francis; 1990.
- Cohen A L, Ronney P D, Frudis U, Sitzki L, Melburg E H, Wussow S. Micro combustor and combustion based thermoelectric micro generator. US Patent 6613972 B2. 2000.
- Kulshreshtha D B, Channiwala S A. Simplified design of combustion chamber for small gas turbine applications. Proc. of International Mechanical Engineering Congress and Exposition. 2005. p. 145–50.
- Abi P. Mathew, A. Asokan, K. Batri, D. Sivakumar. Comparative analysis of flame image features for combustion analysis. Indian Journal of Science and Technology. 2016 Feb; 9(6). DOI No: 10.17485/ijst/2016/v9i6/79904
- Bala Murli P. Simulation studies of premixed ch4/air Micro combustion. Int. Journal of Engineering Research and Applications. 2014; 4 (4): 96–102.
- O’Conaire M, Curran H J, Simmie J M. A comprehensive modelling study of hydrogen oxidation, International Journal of Chemical Kinetics. 2004; 36 (11): 603–22.
- Smith G, Golden D, Frenklach M, Moriarty N, Bowman G. GRI Mech 3.0. USA: Gas Research Institute; 1999.
- Nur Tantiyani Ali Othman, Mohd Pazlin Ngaliman. CFD Simulation of Gas-Liquid in an Agitated Vessel. Indian Journal of Science and Technology. 2016 June; 9(21). DOI No: 10.17485/ijst/2016/v9i21/95246
- S. Balamurugan, P. K. Srividhya, C. Mohanraj. Design and effect of equivalence ratio on performance characteristics of lab scale FBC gasifier. Indian Journal of Science and Technology. 2016 May; 9(17). DOI No:10.17485/ijst/2016/ v9i17/93155
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