Accession Number:

ADA134597

Title:

Hydroshock (Trademark) Water Gun Research

Descriptive Note:

Final rept.

Corporate Author:

HYDROACOUSTICS INC ROCHESTER NY

Personal Author(s):

Report Date:

1983-04-05

Pagination or Media Count:

72.0

Abstract:

The hydroshock water gun is a repetitive underwater impulse generator powered by high-pressure water. It converts the potential energy of compressed air into the kinetic energy of high-velocity water jets, then into the potential energy of underwater cavitation voids and ultimately into the acoustic energy generated by violent implosion of the cavitation voids. The source produces a clean impulsive signature with a farfield peak source level greater than 5 bar- meters in a 0 to 5000 Hz band. Most of the energy is below 2000 Hz. The source is powered by a 15-hp triplex pump and is triggered by a dc voltage from the source controller to the solenoid valve on the gun. High pressure air in the air chamber accelerates the piston which pushes water out of the ports at high velocity until the piston crosses over the ports, abruptly terminating the outward flow through the four ports. Cavitation voids, which are formed by each of the four jets, grow and subsequently collapse violently creating the acoustic pulse. The piston is decelerated in a controlled manner in the forward water- filled cavity which forms a dashpot. By powering the device with water instead of compressed air, operating efficiency is estimated to be increased by an order of magnitude.

Subject Categories:

  • Pumps, Filters, Pipes, Tubing, Fittings and Valves
  • Test Facilities, Equipment and Methods
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE