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Real-Time Simulation Methodology for Rotor-Airwake Interactions

Award Information

Department of Defense
Award ID:
Program Year/Program:
2011 / SBIR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Cascade TechNologies, Inc.
2445 Faber Place Suite 100 Palo Alto, CA 94303-3347
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 1
Fiscal Year: 2011
Title: Real-Time Simulation Methodology for Rotor-Airwake Interactions
Agency: DOD
Contract: N68335-11-C-0088
Award Amount: $80,000.00


The overall objective of this proposal is to develop a physics based methodology that is capable of simulating two-way coupled, non-linear interaction of ship-airwake and helicopter rotor-wake in flow-through in a real-time fashion, and to demonstrate the prototype method in the Manned Flight Simulator (MFS) for a piloted simulation. We focus on demonstrating the critical importance of taking fully into account the non-linear two-ways interactions between the ship airwake and the rotor-wake of a helicopter landing on a ship deck, and that the simulation can proceed in real time by exploiting graphics-processing-unit (GPU) based parallel computation techniques. To achieve this objective, we rely upon the following technology components, 1) GPU based parallelism, 2) adaptive vorticity confinement (AVC) technique, 3) efficient and flexible rotor models, 4) efficient numerical method for block-structured inviscid flow system 5) dynamic/moving overset grid to model rotor in maneuver 6) Simulink based coupling of CFD and flight-simulator In Phase-1 the feasibility of the above real-time methodology will be demonstrated for realistic rotor-airwake interactions with the rotor-wake in stationary position in the vicinity of a generic ship superstructure. In Phase II, the proposed real-time modeling approach is extended to account for the circulation effects of a helicopter moving through the ship airwake in real-time. A decomposition technique of linear and non-linear regimes of interaction is employed to maximize computational efficiency. The software enhancement and its validation will be carried out entirely in GPU based computational framework.

Principal Investigator:

Bono Wasitho
Technical Lead
(650) 521-0243

Business Contact:

Donna Carrig
Chief Financial Officer
(650) 521-0243
Small Business Information at Submission:

Cascade Technologies Incorporated
2445 Faber Place #100 Palo Alto, CA -

EIN/Tax ID: 043353686
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No