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Patent Searching and Data


Title:
AN ACTIVE DRAG-REDUCTION SYSTEM AND A METHOD OF REDUCING DRAG EXPERIENCED BY A VEHICLE
Document Type and Number:
WIPO Patent Application WO/2018/042143
Kind Code:
A1
Abstract:
It is desirable to minimise all forms of trailing vortices from a moving vehicle, whether they are from turbulent form drag of a vehicle or from vortex drag. Wingtip vortices on aircraft can persist for relatively long times (of the order of several minutes after the passage of an aircraft) which can cause danger to other aircraft, in particular around airfields where time must be left between subsequent take-offs and/or landings on a given runway for such vortices to dissipate. According to a first aspect of the present invention, there is provided an active drag-reduction system having first (22) and second (24) fluid outlets located on a vehicle (10) adjacent to a low pressure (drag) region (12), wherein fluid ejected from the second fluid outlet (24) is at a higher pressure / ejection velocity than from the first fluid outlet (22). Turbulent and/or low pressure regions adjacent to vehicles are not uniform, but rather have a varying intensity. For instance, the centre of a region may have a lower pressure and/or more turbulent nature than the periphery of the region. In this way, therefore, the present invention allows the system of the present invention to inject relatively higher pressure air (or relatively higher speed air) into the relatively lower pressure / more turbulent part of the low pressure / turbulent region, and relatively lower pressure air (or relatively lower speed air) into the relatively higher pressure / less turbulent part of the low pressure / turbulent region, compared to each other.

Inventors:
ELOGAB, Osama (48 Arundells Way, Creech St. Michael, Taunton Somerset TA3 5QT, TA3 5QT, GB)
ELOGAB, Hatem (48 Arundells Way, Creech St. Michael, Taunton Somerset TA3 5QT, TA3 5QT, GB)
Application Number:
GB2016/052729
Publication Date:
March 08, 2018
Filing Date:
September 05, 2016
Export Citation:
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Assignee:
OGAB LIMITED (Rumwell Hall, Rumwell, Taunton Somerset TA4 1EL, TA4 1EL, GB)
International Classes:
B62D37/02
Foreign References:
US5908217A1999-06-01
US20130306177A12013-11-21
US20150054302A12015-02-26
EP1544089A12005-06-22
Other References:
SRISHA M.V. RAOA; G. JAGADEESH: "Novel supersonic nozzles for mixing enhancement in supersonic ejectors", APPLIED THERMAL ENGINEERING, vol. 71, no. 1, 5 October 2014 (2014-10-05), pages 62 - 71, XP029090223, DOI: doi:10.1016/j.applthermaleng.2014.06.025
Attorney, Agent or Firm:
HANDSOME I.P. LTD (27-28 Monmouth Street, Bath Somerset BA1 2AP, BA1 2AP, GB)
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