Evaporation of Monodisperse Fuel Sprays in Flowing Air.
Abstract
This work represents the Final Report of a research program dealing with liquid fuel droplet evaporation in flowing high temperature and pressurized air. A major effort was applied to the design, fabrication, and utilization of a heated air flow tunnel into which monodisperse droplets with controlled axial spacing and velocity it was possible to photomicroscopy to measure the droplets (typically 100 um) along individual spray streams, and then to calculate an effective evaporation rate. Both n-heptane and JP-4 fuels were injected into a hto air stream with air velocities typically exceeding 5 m/sec. The droplet evaporation data show that, for our spray, the quasi-steady isolated drop theory underestimates the evaporation rate. Air velocity and turbulence were measured by an LDV system and the recirculation zone downstream of the injector was precisely measured under cold and hot flow. These data, with the measured droplet evaporation, were sufficient in scope to allow a comparison of measurements with a comprehensive turbulent flow model. Results of that modeling work are presented and indicate that there is excellent agreement between analysis and measured flow conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1986
- Accession Number
- ADA177119
Entities
People
- G. N. Schroering
- H. Krier
- J. E. Kirwan
- J. E. Peters
- Keehoon Kim
Organizations
- University of Illinois Urbana–Champaign