Peter F Hendricks

US Patent:

7420875, Sep 2, 2008

Filed:

Jun 25, 2007

Appl. No.:

11/767658

Inventors:

Peter J. Hendricks - Portsmouth RI, US

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01S 15/89

US Classification:

367 91, 367 90

Abstract:

A method is provided for improving horizontal spatial resolution of a flow field in compact jet-like current features so as to quantify the axial velocity in the cross section of a compact jet using an Acoustic Doppler Current Profiler (ADCP). The ADCP is a four-beam, Janus-type ADCP having beams aligned so that each of the beams is at an angle of about 20 to 30 to vertical and at 45 to the fore and aft axis of the vessel, such that two beams point at 45 to forward and two pointing 45 to aft. The measurements from each range bin of the aft-facing beams are combined with the previously measured samples from the corresponding forward-facing beams at the same position along the vessel track.

US Patent:

61062367, Aug 22, 2000

Filed:

Mar 25, 1999

Appl. No.:

9/285182

Inventors:

Charles W. Henoch - Providence RI
Peter J. Hendricks - Portsmouth RI

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H02K 4400
G21D 702

US Classification:

417 50

Abstract:

A fluid conduit for flowing electrically conductive fluids includes an elrically conductive pipe, an electrically conductive rod extending axially through the pipe and centrally thereof, a first power source in electrical communication with the pipe and rod, a solenoidal electromagnet disposed around the pipe and a second power source in electrical communication with the electromagnet. Activation of the first and second power sources creates an electric and a magnetic field, respectively, within the pipe which interact and result in a circumferential force in the flow with consequent reduction in wall friction in the pipe.