Abstract
The drop and spray combustion properties of the hydroxyl-ammonium nitrate (HAN)-based monopropellant LGP 1845 were studied. Drop-burning rates were measured with drops supported in a combustion gas environment at pressures of 0.2-7.0 MPa. Some internal gasification of drops-causing swelling, partial bursting, and microexplosions-was observed throughout this region, but these disturbances decreased with increasing pressure. Effective drop-burning rates (including effects of both surface gasification and bursting) were relatively constant, ca. 10 mm/s, and were consistent with earlier strand-burning-rate measurements of gelled propellant. Pressure-atomized combusting sprays were studied in combustion gas environments at pressures of 3-9 MPa. The liquid-containing region was significantly larger than earlier measurements of Birk and Reeves,19 as well as predictions based on the locally-homogeneous-flow approximation of multiphase flow theory. In conjunction with drop-trajectory calculations, based on present measurements of drop-burning rates, these findings suggest significant effects of separated flow in combusting HAN-based monopropellant sprays.
Original language | English (US) |
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Pages (from-to) | 382-391 |
Number of pages | 10 |
Journal | Journal of Propulsion and Power |
Volume | 6 |
Issue number | 4 |
DOIs | |
State | Published - 1990 |
Externally published | Yes |
ASJC Scopus subject areas
- Aerospace Engineering
- Fuel Technology
- Mechanical Engineering
- Space and Planetary Science