DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
AN EXPLORATORY INVESTIGATION OF JET-BLAST EFFECTS ON A DUST-COVERED SURFACE AT LOW AMBIENT PRESSURE
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC
A preliminary investigation was conducted to determine the effects of jet blast, at low ambient pressures, on a surface covered with loose particles. Test configurations had from one to four nozzles at various cant angles and heights above the particle-covered surface. Results indicate the possibility that problems may exist, due to jet-blast effects, ranging from visibility impairment to damage from impact of the surface particles with the vehicle. In single-nozzle tests the jet blast cleared the dust particles from an annular area on the test surface however, a buildup of dust particles immediately under the nozzle was observed. This buildup of particles persisted throughout the test run. Multiple-nozzle systems having two or three nozzles in line at cant angles of 0 degrees and placed close together provided sufficient clearing of the landing area without causing surface particles to strike the vehicle.