Experimental study of detonation in a cryogenic two-phase H<sub>2</sub>-O<sub>2</sub> flow
PROCEEDINGS OF THE COMBUSTION INSTITUTE, cilt.33, ss.2235-2241, 2011 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 33
- Basım Tarihi: 2011
- Doi Numarası: 10.1016/j.proci.2010.06.160
- Dergi Adı: PROCEEDINGS OF THE COMBUSTION INSTITUTE
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.2235-2241
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
Direct initiation and propagation of detonation through a cryogenic two-phase flow constituted by liquid oxygen droplets in gaseous hydrogen at 100 K are experimentally investigated. The influence of droplet size distribution is characterized in a cryogenic gaseous helium and liquid oxygen two-phase flow. Droplet sizing and detonation experiments are conducted by varying different parameters: distance from the injector, helium and hydrogen mass flow rates, global equivalence ratio and addition of gaseous nitrogen. Droplet size distributions reveal quick vaporization of the smallest droplets of the cryogenic jet. Results in terms of wave velocity, pressure, and detonation cells show that a detonation wave can be directly initiated, with a propagation wave velocity of 20% higher than the Chapman-Jouguet value. Cell size measurements show that the mixture sensitivity is not affected by the presence of droplets. Addition of gaseous nitrogen reduces only slightly the peak pressure, but the detonation velocity is reduced by about 30%. (C) 2010 The Combustion Institute. Published by Elsevier Inc. All rights reserved.