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Abstract

This paper presents the main results of the test campaign performed on a frigate ship model in a low-speed wind tunnel in order to investigate the ship superstructure airwake by means of particle image velocimetry (PIV). On board wind velocities measurements above the flight deck were carried out by a sonic anemometer and results were compared with these obtained in wind tunnel tests, providing information about the influence of the ship environment on the helicopter safe operational limitations during launch and recovery operations. The first step in the helicopter–ship qualification program is determine the wind limitations in order to build a candidate launch and recovery wind envelope. Thus subsequent steps of the program, additional effects produced by the helicopter rotor and ship motion must be evaluated, and finally flight trial on the ship must be performed to evaluate the pilot workload.

Keywords

Ship flight deck wind envelope wind tunnel flow field velocity

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References

Findlay DB, and Ghee T. Experimental investigation of ship airwake flow control for US navy flight II-A class destroyer (DDG). In: AIAA 2006-3501, San Francisco, CA, 5–8 June 2006.

Geyer WP, Long K and Carico D. Helicopter/ship qualification. Part 2: American clearance process. RTO AG-300, vol. 22/SCI-038. RTO/NATO 2003. ISBN 92-837-1093-2.

Greenwell DI and Barrett RV. Inclined screens for control of ship air wakes. In: AIAA 2006-3502, 3rd AIAA flow control conference, San Francisco, CA, 5–8 June 2006.

Tinney CE and Ukeiley LS. A study of a 3D double backward-facing step. Experiments in fluids. Berlin, Heidelberg: Springer-Verlag, 2009.

Zan SJ. Surface flow topology for a simple frigate shape. Canadian Aeronaut Space J 2001; 47(1): 33–43.

Shafer DM and Ghee TA. Active and passive flow control over the flight deck of small naval vessels. In: AIAA 2005-5265. 35th AIAA fluid dynamics conference and exhibit, Toronto, Ontario, Canada, 6–9 June 2005.

Platt JR. Wind detection in a microcosm: ship/aircraft environment sensors. IEEE AES Systems Magazine, February 1998.

Fang R and Booij PJA. Helicopter-ship qualification testing. The Dutch Clearance Process. National Aerospace Laboratory NLR. Report no. NLR-TP-2006-024.

RTO Technical Report TR-AVT-148. Modelling and simulation of the ship environment for safer aircraft launch and recovery. Final Report of Task Group AVT-148, February 2012. NATO Unclassified.

10.

Snyder MR, Kang HS, Brownell CJ, et al. USNA ship air wake program overview. In: 29^th AIAA applied aerodynamics conference. Honolulu, Hawaii, 27–30 June 2011, AIAA 2011-3153.

11.

Bardera

. An experimental helicopter wind envelope for ship operations. World Acad Sci Eng Technol 2012; 68: 1362–1369.

12.

Brownell CJ, Luznik L, Snyder MR, et al. Velocity measurements in a ship airwake with crosswind. In: 42nd AIAA fluid dynamics conference and exhibit, New Orleans, Louisiana, 25–28 June 2012. AIAA 2012-2851.

13.

Snyder MR, Shishkoff JP, Roberson FD, et al. Comparison of experimental and computational ship air wakes for YP class patrol craft. In: ASNE launch and recovery symposium 2010, Arlington, VA, 8–9 December 2010.

14.

Adrian RJ and Westerweel J. Particle image velocimetry. New York, USA: Cambridge University Press, 2011.

15.

Kähler

Sammler

Kompenhans

. Generation and control of tracer particles for optical flow investigation in air. Exp Fluids 2002; 33: 736–742.

16.

Echols WH and Young YA. Studies of portable air-operated aerosol generator. NRL Report 5929. Washington, DC: Naval Research Laboratory, 1963.

17.

Prasad AK. “Particle Image Velocimetry”. Curr Sci 2000; 79(1): 51–60.

18.

Raffel

Willert

Wereley

. Particle image velocimetry a practical guide, 2nd edn. Berlin, Heidelberg: Springer-Verlag, 2007.

19.

Brownell CJ, Luznik L, Snyder MR, et al. In situ velocity measurements in the near-wake of a superstructure. J Aircraft 2012; 49(5): 1440–1450.

20.

Willert C, Raffel M and Kompenhans J. Recent applications of particle image velocimetry in large-scale industrial wind tunnels. In: 17th International Congress on Instrumentation in Aerospace Simulation Facilities (ICIASF), 1 September–October 1997, pp.258–266.

21.

Lee RG and Zan SJ. Wind tunnel testing to determine unsteady loads on a helicopter fuselage in a ship airwake. In: ICAS 2002-Congress.

Flow field velocity on the flight deck of a frigate

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