Atomization and breakup of cryogenic propellants under high-pressure subcritical and supercritical conditions
JOURNAL OF PROPULSION AND POWER, cilt.14, sa.5, ss.835-842, 1998 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 14 Sayı: 5
- Basım Tarihi: 1998
- Doi Numarası: 10.2514/2.5348
- Dergi Adı: JOURNAL OF PROPULSION AND POWER
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.835-842
- Orta Doğu Teknik Üniversitesi Adresli: Hayır
Özet
Recent results on the atomization and breakup of cryogenic propellants under high-pressure subcritical and supercritical conditions are surveyed. Cryogenic fluids were injected into various gases under both cold-now and hot-fire conditions,and the results were visualized using flashlight photography and highspeed cinematography. In some cases, simulation fluids were used to study atomization and breakup behavior. In others, hot-fire tests with liquid oxygen and gaseous hydrogen demonstrated now phenomena under realistic cryogenic rocket engine conditions. The visualizations reveal a remarkable difference between subcritical spray formation and evaporation and supercritical injection and mixing. As chamber pressure approaches the critical pressure, injection can no longer he regarded as simple "spray" formation, but rather as a fluid/fluid mixing process that can be extremely sensitive to small perturbations in pressure, temperature, local mixture concentrations, and initial injection conditions.