A STUDY OF THE EFFECT OF AMMONIA BLENDING ON BURNING VELOCITY OF LPG AT INITIAL PRESSURE WITH HIGH-SPEED CAMERA

JAAFAR SAMI  SHABAN; SAMER. M.  ABDULHALEEM

doi:10.26682/csjuod.2023.26.2.62

JAAFAR SAMI SHABAN College of Engineering, University of Babylon- Iraq
SAMER. M. ABDULHALEEM College of Engineering, University of Babylon- Iraq

DOI: https://doi.org/10.26682/csjuod.2023.26.2.62

Keywords: laminar Burning Velocity, flame speed, Ammonia Blending LPG, Markstine length

Abstract

This experiment measures premixed flame laminar speed and burning velocity for LPG, air, and ammonia. A centrally ignited constant volume chamber has been designed and constructed to experimentally investigate stretched flame speed (Sn), laminar burning velocity (Su), Markstein length (Lb), and ammonia and liquefied petroleum gas are mixed in a combustion chamber with a constant volume of cylindrical shape and volume (0.04899 m3), inner diameter 395 mm, and length 400 mm, the flange with a thickness of 12 mm diameter 407 mm and 570 mm both sides made of A Schlieren visualizes and analyzes transparent medium density changes. It detects slight refractive index changes caused by temperature, pressure, or density gradients. The Schlieren method employs light beams' directionality in zones with different refractive indices. Light refracts through transparent materials like air to reach denser regions. These slight changes can be seen with careful light ray manipulation. beginning pressures (100-200-300) kPa, 0.8-1.3 equivalency ratios, and 298 K. In the constant-size combustion chamber and central ignition investigation, increasing starting pressure decreased laminar flame speed, Markstein length, and burning velocity. Valence, 100 kPa starting pressure, and 20% fuel ammonia content were investigated. We notice that su is 27.28 cm/sec cm at valency 0.8 and 38.315 cm/sec at equivalence ratio 1. Su rises with valence and then falls. Valence increased at 1.3 equivalence ratios.su 32.552 cm/sec At 20% ammonia concentration and equivalency ratios 1, su's value at 100 kPa is 34.945 cm /sec and at 200 kPa is 28.93 cm /sec, showing how starting pressure increases with pressure. Initial pressure reduces su. Practical experiments showed that ammonia reduces su. The value of su. It was 31.645 cm /sec at 20% ammonia, 200 kPa starting pressure, and 1 equivalence ratio. Same conditions, 30% ammonia, Su. 28,935 cm/sec.

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References

Wang, Y., Zheng, S., Chen, J., Wang, Z., & He, S. (2018). Ammonia (NH3) storage for massive PV electricity. Energy Procedia, 150, 99–105.
Hu Erjiang, Zuohua H, Jiajia H, Chun J, Jianjun Z. Experimental and numerical study on laminar burning characteristics of premixed methane-hydrogen-air flames. Int J Hydrogen Energy 2009; 34:4876e88.
Huzayyin AS, Moneib HA, Shehatta MS, Attia AMA. Laminar burning velocity and explosion index of LPG/air and propane/ air mixtures. Fuel 2008; 87:39e57.
Tang C, Huang Z, Jin C, He J, Wang J, Wang X, et al. Laminar burning velocities and combustion characteristics of propane-hydrogen-air premixed flames. Int J Hydrogen Energy 2008; 33:4906e14.
Abdul Raheem, A. A., Saleh, A. M., & Shahad, H. A. K. (2021). Measurements and Data Analysis Review of Laminar Burning Velocity and Flame Speed for Biofuel/Air Mixtures. IOP Conference Series: Materials Science and Engineering, 1094(1), 12029.
Marshall, S. P., Taylor, S., Stone, C. R., Davies, T. J., & Cracknell, R. F. (2011). Laminar burning velocity measurements of liquid fuels at elevated pressures and temperatures with combustion residuals. Combustion and Flame, 158(10), 1920–1932
Kuo, K. K. (2005). Gaseous diffusion flames and combustion of a single liquid fuel droplet. Principles of Combustion.
Konnov, A. A., Mohammad, A., Kishore, V. R., Kim, N. Il, Prathap, C., & Kumar, S. (2018). A comprehensive review of measurements and data analysis of laminar burning velocities for various fuel+ air mixtures. Progress in Energy and Combustion Science, 68, 197–267.
Unbeholden, L., & Koelliker, E. (1916). Information about the inner core of the Bunsen flame. Journal Fur Gasbeluchtung Und Wasserversorgung, 59, 49–57.
Mallard, & Chatelier, L. (1883). Recherches expérimentales et théoriques sur la combustion des mélanges gazeux explosifs. Dunod.
Daniell, P. J. (1930). The theory of flame motion. Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 126(802), 393–405.
Nusselt, W. (1915). Die Zundgeschwindigkeit Bren barer gasgemische. Duet Ing, 59, 872–878.
Zeldovich, Y. B., & Frank-Kamenetzky, D. A. (1938). The theory of thermal propagation of flames. Zh. Fiz. Khim, 12, 100–105.
Agnew, J. T., & Graiff, L. B. (1961). The pressure dependence of laminar burning velocity by the spherical bomb method. Combustion and Flame, 5, 209–219.
Sharma, S. P., Agrawal, D. D., & Gupta, C. P. (1981). The pressure and temperature dependence of burning velocity in a spherical combustion bomb. Symposium (International) on Combustion, 18(1), 493–501.
Bradley, D., Gaskell, P. H., & Gu, X.-J. (1996). Burning velocities, Markstein lengths, and flame quenching for spherical methane-air flames: a computational study. Combustion and Flame, 104(1–2), 176–198.
Kwon, O. C., Rozenchan, G., & Law, C. K. (2002). Cellular instabilities and self-acceleration of outwardly propagating spherical flames. Proceedings of the Combustion Institute, 29(2), 1775–1783.
Andrews, G. E., & Bradley, D. (1972). Determination of burning velocities: a critical review. Combustion and Flame, 18(1), 133–153.
Hayakawa, A., Goto, T., Mimoto, R., Arakawa, Y., Kudo, T., & Kobayashi, H. (2015). Laminar burning velocity and Markstein length of ammonia/air premixed flames at various pressures. Fuel, 159, 98–106.