Observations on the low temperature vaporization and envelope or wake flame burning of n-heptane droplets at reduced gravity during parabolic flights

GÖKALP, İSKENDER; Chauveau, C.; Richard, J.R.; Kramer, M.; Leuckel, W.

doi:10.1016/s0082-0784(89)80218-8

Observations on the low temperature vaporization and envelope or wake flame burning of n-heptane droplets at reduced gravity during parabolic flights

GÖKALP İ., Chauveau C., Richard J., Kramer M., Leuckel W.

Symposium (International) on Combustion, cilt.22, sa.1, ss.2027-2035, 1989 (Scopus)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 22 Sayı: 1
Basım Tarihi: 1989
Doi Numarası: 10.1016/s0082-0784(89)80218-8
Dergi Adı: Symposium (International) on Combustion
Derginin Tarandığı İndeksler: Scopus
Sayfa Sayıları: ss.2027-2035
Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

A Droplet Burning Facility which allows the investigation of droplet vaporization and burning under various dynamic and thermal conditions has been constructed. The system has been operated during the parabolic flights of the NASA KC135 aircraft. An important set of data has been collected on the low temperature vaporization and envelope or wake flame burning of suspended n-heptane droplets at reduced gravity conditions. From digitized images delivered by a rapid video camera, the time evolution of the droplet and the flame dimensions are determined with great accuracy. This information is used to deduce the vaporization rate, the flame diameter and the flame standoff ratio under various conditions. The evolution of these parameters is compared to that on normal gravity conditions obtained with the same apparatus. The Reynolds number dependency of the vaporization rate under reduced and normal gravity conditions is also discussed. © 1997 Combustion Institute.