Analysis of Ship Air Wakes
Abstract
BAA 14-001 Abstract This proposal provides for the analysis of ship air wake data that is collected as part of the concurrent United States Naval Academy (USNA) Center for Air Wake Studies (CAWS) proposal which has been submitted separately. This proposal and the pending USNA CAWS proposal are for the same period of performance. Ship air wake studies were first commenced at USNA as part of the funded Fiscal Year (FY) 2009 Young Investigator Program (YIP) proposal for “Determination of Shipborne Helicopter Launch and Recovery Limitations using Computational Fluid Dynamics.” CAWS was subsequently funded at USNA for FY 2012-2014, with USNA subsequently issuing sole contracts for George Washington University personnel to assist in the collection and analysis of ship air wake data. Validation of CFD simulations of ship air wakes has been a primary focus of this research program. Validation of these CFD simulations of the ship air wake above the USNA Research Vessel YP676 flight deck has been successfully accomplished. Efforts continue to validate CFD predictions of off-ship air wakes. 16 journal, invited or peer reviewed papers have been completed since the inception of ship air wake research at USNA in 2009. Collaboration with Naval Air Systems Command (NAVAIR) has been frequent and significant since the project commenced and will continue in the future. On-going investigation efforts include indirect measurement of off-ship air wake turbulence fields using an instrumented remotely piloted rotorcraft, with a trained neural network to remove pilot-induced vibrations and kinematics effects in real-time, and measurement of dynamic interface, or interaction of a helicopter’s air wake with the ship air wake, using a small portable whirl stand mounted on the flight deck of YP676. Future efforts include directly measuring offship air wakes using ultrasonic anemometers carried by a remotely piloted rotorcraft, which has direct application to determination of launch and recovery envelopes for US Navy helicopter capable ships. Calibration of the instrumented rotorcraft, with and without anemometers, will be conducted by flying the rotorcraft through a measured and known air wake generated by large fans in an enclosed hangar.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 12, 2016
- Source ID
- N000141512043
Entities
People
- Murray Snyder
Organizations
- George Washington University
- Office of Naval Research
- United States Navy