Separated Flow Considerations for Pressure Atomized Combusting Monopropellant Sprays
Abstract
The drop and spray combustion properties of the 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, 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. Reprints.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1988
- Accession Number
- ADA204442
Entities
People
- G. Faeth
- L. Tseng
- Ted Lee
Organizations
- University of Michigan