Accession Number : AD0663893

Title :   INVESTIGATION OF WATER IMPACT OF BLUNT RIGID BODIES - REAL FLUID EFFECTS.

Descriptive Note : Technical rept.,

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TEX DEPT OF MECHANICAL SCIENCES

Personal Author(s) : Gerlach,C. Richard

Report Date : 29 DEC 1967

Pagination or Media Count : 46

Abstract : The results of an experimental investigation of the importance of air density and other real fluid properties to water impact of small, blunt, rigid bodies are given. Assuming peak impact pressure to be the dependent variable, the significant fluid properties were found to be liquid density, liquid sonic velocity, gas density and probably to some extent, gas kinematic viscosity. The test results indicate that even for low velocity impact, where air compressibility is a principal factor, acoustic propagation in the water needs consideration and should not be neglected without justification. A limited amount of testing was also done to determine the effect of liquid surface waves and the restriction of airflow upon impact pressures. Finally, high-speed motion pictures were taken that showed the surface disturbance during impact. (Author)

Descriptors :   (*SHIPS, IMPACT SHOCK), (*WATER ENTRY, IMPACT SHOCK), SHOCK RESISTANCE, BLUNT BODIES, GASES, DENSITY, FLUID DYNAMICS, SURFACE PROPERTIES, ACOUSTIC PROPERTIES, PRESSURE, MODEL TESTS

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE