Benchmarking numerical predictions with force and moment measurements on slender, supercavitating bodies
High-speed water-entry is a very complex, dynamic process. As a first attempt at modeling the process, a numerical solution was developed at Sandia National Laboratories for predicting the forces and moments acting on a body with a steady supercavity, that is, a cavity which extends beyond the base of the body. The solution is limited to supercavities on slender, axisymmetric bodies at small angles of attack. Limited data were available with which to benchmark the axial force predictions at zero angle of attack. Even less data were available with which to benchmark the pitching moment and normal force predictions at nonzero angles of attack. A water tunnel test was conducted to obtain force and moment data on a slender shape. This test produced limited data because of waterproofing problems with the balance. A new balance was designed and a second water tunnel test was conducted at Tracor Hydronautics, Inc. This paper describes the numerical solution, the experimental equipment and test procedures, and the results of the second test. 8 refs., 11 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5974068
- Report Number(s):
- SAND-90-3227C; CONF-9106114-1; ON: DE91007066
- Resource Relation:
- Conference: 1991 cavitation and multiphase flow conference, Portland, OR (USA), 23-26 Jun 1991
- Country of Publication:
- United States
- Language:
- English
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SUPERCONDUCTIVITY AND SUPERFLUIDITY
CYLINDERS
FLUID FLOW
HYDRODYNAMICS
NUMERICAL SOLUTION
BALANCES
BENCHMARKS
CAVITATION
CAVITIES
COMPUTER CODES
CONES
EXPERIMENTAL DATA
LAMINAR FLOW
PRESSURE EFFECTS
PROJECTILES
STRUCTURAL MODELS
TURBULENT FLOW
VELOCITY
DATA
FLUID MECHANICS
INFORMATION
MEASURING INSTRUMENTS
MECHANICS
NUMERICAL DATA
WEIGHT INDICATORS
640410* - Fluid Physics- General Fluid Dynamics