Ventilated Cavity Test of a 3-Inch Diameter Streamlined Nose.
PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB
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A ventiliated cavity test of a 3-inch diameter streamlined nose has been conducted in the 48-inch water tunnel. Tests were conducted at 10, 20, 30 and 40 fps for dimensionless cavity lengths L sub CD from approximately 1 to 4. The cavitating flow was documented by video tape and still photography. The purpose of the test was threefold namely 1 to approximate the ventilation flow rate coefficient C sub Q 2 to observe the stability of the pressure control system as gas was added to the flow, and 3 to observe the approximate boundary between the twin vortex regime and reentrant jet regime. The major results are 1 the ventilation flow rate coefficient is approximately 30 greater than that estimated for a quarter caliber ogive nose, 2 the pressure control system is stable and 3 the twin vortex regime is primarily confined to velocities of 10 fps and less for the gas flow rates employed in this investigation. Author
- Fluid Mechanics