Accession Number:

ADD020159

Title:

Boiling Heat Transfer Torpedo

Descriptive Note:

Patent application, Filed 30 Jul 2004

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

2004-07-30

Pagination or Media Count:

22.0

Abstract:

This patent application discloses a system for a torpedo that creates and maintains a vapor cavity to reduce drag and increase propulsion efficiency. The system has a source of gas venting gas at a nose portion of the vehicle to create a gasvapor cavity on the nose portion and an adjacent hull of the vehicle. A thermal engine propelling the vehicle through ambient water creates waste heat for heating the hull to raise the temperature of the gasvapor cavity extending over it. A pump aft on the vehicle recirculates a portion of the gasvapor cavity as recirculated gas to the nose portion. The velocity of the recirculated gas of the gasvapor cavity is controlled by the pump to be virtually the same as the relative flow rate of the ambient water along an interface boundary between the gasvapor cavity and the ambient water. 4 figures

Subject Categories:

  • Torpedoes
  • Fluid Mechanics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE