AN EXPLORATORY INVESTIGATION OF JET-BLAST EFFECTS ON A DUST-COVERED SURFACE AT LOW AMBIENT PRESSURE
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC
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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.
- Combustion and Ignition