Coupled Vertical/Short Takeoff and Landing (VSTOL) Down Wash-Ground Effect and Ship Air Wake Turbulent Flow Simulation Model

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-02-C-3057
Agency Tracking Number: N01-155-05
Amount: $99,972.00
Phase: Phase I
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
174 North Main Street, P.O. Box 1150, Dublin, PA, 18917
DUNS: 929950012
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Neeraj Sinha
 Vice President & Tech Dir
 (215) 249-9780
 sinha@craft-tech.com
Business Contact
 Neeraj Sinha
Title: Vice President & Tech Dir
Phone: (215) 249-9780
Email: sinha@craft-tech.com
Research Institution
N/A
Abstract
"Integration of aviation units with air capable Navy ships has always been a challenge. V/STOL aircraft, e.g. AV-8B, JSF, etc. encounter unique challenges in performing takeoff and landing during the course of shipboard operations due to the interaction ofthe propulsion-generated jet downwash with the unsteady air wake generated by the ship superstructure & deck. Operational envelopes must be developed through extremely expensive, time-consuming and demanding at-sea trials. Additionally, the powerful V/STOLjet outwash is a major safety hazard for ship deck personnel. The proposed effort will lead to thedevelopment and validation of a physics-based, high fidelity Computational Fluid Dynamic (CFD) model for predicting dynamic interface (DI) performance. Complexity of the geometry, magnitude of the domains entailed, and presence of a very broad range ofphysical phenomena make this into a challenging proposition. A novel unstructured CFD method is proposed which brings together: 1) innovations in CFD numerical algorithm; 2) resource efficient hybrid RANS-LES turbulence modeling; 3) turbulent flowfieldreconstruction using Proper Orthogonal Decomposition (POD); and 4) an advanced parallel architecture framework. A zonal simulation strategy has been formulated which provides optimum utilization of computational resources for simulating DI performance ofrealistic ship-aircraft at true conditions. The technology development proposed is directl

* Information listed above is at the time of submission. *

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