• JAAFAR SAMI SHABAN College of Engineering, University of Babylon- Iraq
  • SAMER. M. ABDULHALEEM College of Engineering, University of Babylon- Iraq
Keywords: laminar Burning Velocity, flame speed, Ammonia Blending LPG, Markstine length


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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How to Cite
SHABAN , J. S., & ABDULHALEEM, S. M. (2023). A STUDY OF THE EFFECT OF AMMONIA BLENDING ON BURNING VELOCITY OF LPG AT INITIAL PRESSURE WITH HIGH-SPEED CAMERA . Journal of Duhok University, 26(2), 693 - 704. https://doi.org/10.26682/csjuod.2023.26.2.62