Accession Number:

ADA224508

Title:

Electrical Characteristics of a Seawater MHD Thruster

Descriptive Note:

Final rept.

Corporate Author:

DAVID TAYLOR RESEARCH CENTER BETHESDA MD

Personal Author(s):

Report Date:

1990-06-01

Pagination or Media Count:

46.0

Abstract:

There is renewed interest in the application of the magneto hydrodynamic MHD propulsion concept to marine propulsion. However, there is almost no experimental information concerning the major physical processes which will occur in a seawater MHD propulsion unit, such as 1 the seawater electrolysis process at operational conditions needed for ship propulsion, 2 the effects of bubble formation on the performance of a seawater thruster and 3 the effectiveness of the MHD interaction in seawater. Small scale tests of an MHD type channel but without an applied magnetic field have been carried out to provide information about the first two of these areas 1 seawater electrolysis and 2 the effect of the H2 bubbles generated during the electrolysis of seawater. Currentvoltage characteristics were obtained with different electrode materials for current densities up to 0.3 ampsq cm. The effect of bubble formation on the channel current has been assessed over a range of operating conditions. Long-duration tests to 100 hrs have been made to provide information on electrode durability and long-term operational problems. jhd

Subject Categories:

  • Marine Engineering
  • Electric and Ion Propulsion

Distribution Statement:

APPROVED FOR PUBLIC RELEASE