Evaporation and Groundfall of JP-4 Jet Fuel Jettisoned by USAF Aircraft
Final rept. Feb 72-Jun 80
AIR FORCE ENGINEERING AND SERVICES CENTER TYNDALL AFB FL ENGINEERING AND SERVICES LAB
Pagination or Media Count:
An experimental and modeling effort was undertaken to determine the physical fate of JP-4 jet fuel discharged from an aircraft in flight. A computer model was developed to simulate evaporation and free-fall of fuel droplets in the atmosphere. In order to apply this model to jettisoned fuel, an experimental study was performed to determine the droplet size distribution produced by the jettisoning process. This study featured in-flight sampling of the fuel plume from a KC-135 tanker aircraft. Sampling was also performed at ground level to determine whether the jettisoned fuel reached the ground in significant concentrations. For fuel jettisoning as low as 750 meters above the ground at temperatures around 11 C, no liquid fuel could be detected by ground observers and no significant hydrocarbon concentrations greater than a few ppm C were measured by the sampling.
- Transport Aircraft
- Atmospheric Physics