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Investigation of Drag Reduction by Boundary Layer Ingestion, Base Blowing, Base…

Award Information

Agency:
Department of Defense
Branch:
Defense Advanced Research Projects Agency
Award ID:
41299
Program Year/Program:
1998 / SBIR
Agency Tracking Number:
41299
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Navatek Ltd
841 Bishop Street Suite 1110 Honolulu, HI -
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1998
Title: Investigation of Drag Reduction by Boundary Layer Ingestion, Base Blowing, Base Ventilation and Free Surface Depression
Agency / Branch: DOD / DARPA
Contract: N/A
Award Amount: $99,000.00
 

Abstract:

This research effort will pursue four key methods of frictional drag reduction identified by Navatek, Ltd. under a prior CEROS MIDFOIL grant as supporting technologies to achieve a very high speed (70-100 knots) large (5,000-10,000 ton) ship. Under this grant, Navatek conceptualized a high-speed ship buoyantly and dynamically supported by high lift-to drag, high operating Froude number (F>1.2) lifting bodies operating in the presence of the free surface. This concept emerged from Navatek's research on SLICE and MIDFOIL technology, including large demonstrators. The four methods are 1) boundary layer ingestion to recover the momentum in the boundary layer; 2) base blowing to reduce the surface area of the submerged hull after bodies, eliminate control surface appendages and alter the pressure distribution over the body; 3) base venting to reduce the surface area of the strut afterbodies; 4) high lift-to-drag deltoid lifting body strut appendages to create a solitary wave to unwet strut appendages. Numerical analysis using validated CFD programs will develop concepts to achieve the highest lift-to-drag performance. The resultant designs can be tested at large model scale using Navatek-owned test craft, including the SLICE and MIDFOIL craft.

Principal Investigator:

Robert Gornstein
8088486309

Business Contact:


0
Small Business Information at Submission:

NAVATEK, LTD.
841 Bishop Street, Suite 1880 Honolulu, HI 96813

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No