Donald H Leopold

US Patent:

7100875, Sep 5, 2006

Filed:

Feb 20, 2004

Appl. No.:

10/784067

Inventors:

Arvin Shmilovich - Huntington Beach CA, US
Yoram Yadlin - Irvine CA, US
Roger Clark - Hungtington Beach CA, US
Donald Leopold - Rancho Santa Margarita CA, US

Assignee:

The Boeing Company - Irvine CA

International Classification:

B64C 23/00

US Classification:

244199, 244207

Abstract:

A system and method for dissipating vortices that form at the wingtips on aircraft and from other airfoils. A jet air stream is discharged in a location at or proximate to the outer end portion of the airfoil into the vortex flow, and the jet air stream is moved cyclically back and forth. The cyclic movement can be at lower or higher frequencies to alleviate at least in part intensity of the vortex or accelerate instability of the vortex which leads to vortex dissipation.

US Patent:

7597289, Oct 6, 2009

Filed:

Jan 13, 2006

Appl. No.:

11/332835

Inventors:

Arvin Shmilovich - Huntington Beach CA, US
Yoram Yadlin - Irvine CA, US
Roger Clark - Hungtington Beach CA, US
Donald Leopold - Rancho Santa Margarita CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

B64C 23/00

US Classification:

2441993, 244207

Abstract:

A system and method for dissipating vortices that form at the wingtips on aircraft and from other airfoils. A jet air stream is discharged in a location at or proximate to the outer end portion of the airfoil into the vortex flow, and the jet air stream is moved cyclically back and forth. The cyclic movement can be at lower or higher frequencies to alleviate at least in part intensity of the vortex or accelerate instability of the vortex which leads to vortex dissipation.

US Patent:

7661629, Feb 16, 2010

Filed:

Mar 7, 2006

Appl. No.:

11/370099

Inventors:

Arvin Shmilovich - Huntington Beach CA, US
Yoram Yadlin - Irvine CA, US
Roger W. Clark - Huntington Beach CA, US
Donald H. Leopold - Rancho Santa Margarita CA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

B64C 23/00
B64C 21/04

US Classification:

2441992, 244207

Abstract:

Apparatuses and methods for the controlled trailing wake flows. An apparatus in accordance with one embodiment is directed to an aircraft system that includes an airfoil having first and second oppositely facing flow surfaces and a tip. The system can further include a vortex dissipation device carried by the airfoil, with the vortex dissipation device including a fluid flow nozzle, a valve device, and a controller. The fluid flow nozzle can be coupleable to a source of pressurized fluid and can include an orifice positioned to direct a flow of fluid outwardly from the tip. The valve device can be coupled in fluid communication with the fluid flow nozzle to selectively control the flow passing through the orifice. The controller can be coupled to the valve device to direct the operation of the valve device. Accordingly, the vortex dissipation device can be activated to accelerate the rate at which vortices (e. g.