Abstract
Schlieren photography was used to record the development of spherical flames in a combustion bomb. Flame speed and flame stretch were evaluated from the data and used to evaluate Markstein lengths and numbers. The results indicate a strong influence of both the spark discharge energy and equivalence ratio. Low spark discharge energy is observed to give rise to more unstable flames compared to high energy sparks. It is observed that for the range of energy tested, 80 and 400 mJ gave the best stability for the flames. For equivalence ratio less or equal to 1.225 an 80 mJ discharge results in flames which are less susceptible to instabilities. The relationship between equivalence ratio and both Markstein number and length can be accurately represented by a third order polynomials for spark discharge energy of 500 mJ.
Recommended Citation
Mushi, E. (1999). Measurement of Markstein Lengths in Laminar Spherical Explosion Flames. Tanzania Journal of Engineering and Technology (TJET), 23(1), 49-56. https://doi.org/https://doi.org/10.52339/tjet.v23i1.289
Publisher Name
University of Dar es Salaam