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Keywords: wind tunnel
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Proceedings Papers

Paper presented at the SNAME 24th Chesapeake Sailing Yacht Symposium, June 10–11, 2022
Paper Number: SNAME-CSYS-2022-006
... of wind-propelled ships for goods transport. This research presents a first analysis of wind tunnel tests carried out at the University of Southampton R.J. Mitchell wind tunnel where three wings are subject to turbulent flow with Reynolds number in excess of 1 million. A range of possible variations...
Proceedings Papers

Paper presented at the SNAME 24th Chesapeake Sailing Yacht Symposium, June 10–11, 2022
Paper Number: SNAME-CSYS-2022-003
... deformation. Furthermore, the experiments revealed that flow behaviours such as the laminar-to-turbulent transition are preserved even with high blockage. The angle of attack at which transition occurs is also preserved in pressurized wind tunnel tests. However, the effect on the forces cannot be fully...
Proceedings Papers

Paper presented at the SNAME 23rd Chesapeake Sailing Yacht Symposium, March 15–16, 2019
Paper Number: SNAME-CSYS-2019-009
... flay reynolds number boundary layer leading-edge vortex wind tunnel downwind sail reservoir surveillance pressure distribution experiment upstream oil & gas vortex aoa production monitoring production control asymmetric spinnaker separation engineering lev simulation...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-003
... solver wind tunnel evaluation fsi problem gp model This paper investigates the use of meta-models for optimizing sails trimming. A Gaussian process is used to robustly approximate the dependence of the performance with the trimming parameters to be optimized. The Gaussian process construction...
Proceedings Papers

Paper presented at the SNAME 22nd Chesapeake Sailing Yacht Symposium, March 18–19, 2016
Paper Number: SNAME-CSYS-2016-006
... bubble wind tunnel Yacht sails experience complex aerodynamics that are challenging to reproduce with numerical methods. The experiments of Fluck on an idealized upwind sail plan [1] [2] showed areas of flow separation and vortex structures that subsequent Reynolds Averaged Navier-Stokes (RANS...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-008
... Wind tunnel testing to determine yacht performance has been carried out for at least the last 50 years. A common perception is that experimental methods do not improve significantly over time. This paper shows how modern wind tunnel testing is still the only realistic way of providing a complete...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-003
... in the wind tunnel and at full scale. While flying shape measurements in the wind tunnel are straight forward to do providing quite accurate results, respective measurements at full scale in natural, stochastic environment turned out to be challenging. As a result of the comparison it can be shown that flying...
Proceedings Papers

Paper presented at the SNAME 20th Chesapeake Sailing Yacht Symposium, March 18–19, 2011
Paper Number: SNAME-CSYS-2011-004
... The main results of a two-year project aimed at comparing full-scale tests, wind tunnel tests, and numerical analysis predictions are presented. Pressure measurements were obtained from both full-scale tests and wind-tunnel tests, in upwind and downwind conditions. The upwind wind tunnel test...
Proceedings Papers

Paper presented at the SNAME 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-008
... THE 19th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2009 Photogrammetric Investigation of the Flying Shape of Spinnakers in a Twisted Flow Wind Tunnel Kai Graf, Institute of Naval Architecture, University of Applied Sciences Kiel (UAS), Kiel / Germany Olaf Müller, LM Glasfiber...
Proceedings Papers

Paper presented at the SNAME 18th Chesapeake Sailing Yacht Symposium, March 2–3, 2007
Paper Number: SNAME-CSYS-2007-003
... THE 18th CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2007 Enhanced Wind Tunnel and Full-Scale Sail Force Comparison Heikki Hansen, Yacht Research Unit, The University of Auckland, Auckland, New Zealand Peter J. Richards, Yacht Research Unit, The University of Auckland, Auckland...
Proceedings Papers

Paper presented at the SNAME 17th Chesapeake Sailing Yacht Symposium, March 4–5, 2005
Paper Number: SNAME-CSYS-2005-013
... The Glenn L. Martin Wind Tunnel (GLMWT) has developed specialized investigative techniques to evaluate underwater appendages for sailing yachts that have been continuously improved through practice by GLMWT staff. These specialized techniques are required to obtain the best possible differential...
Proceedings Papers

Paper presented at the SNAME 16th Chesapeake Sailing Yacht Symposium, March 3, 2003
Paper Number: SNAME-CSYS-2003-013
... ABSTRACT example, velocity prediction programs (VPP) and rules such as the International Measurement System (IMS) are A parametric series of eight spinnaker models based on mathematical models that estimate force was built and tested in a wind tunnel according to the coefficients for both hulls and sails...
Proceedings Papers

Paper presented at the SNAME 15th Chesapeake Sailing Yacht Symposium, January 26, 2001
Paper Number: SNAME-CSYS-2001-003
... the development oflarge runs oflaminar flow. In correlate with wind tunnel or towing tank tests. order to determine whether laminar boundary layers A recent short course on boundary layer transition routinely develop at full-scale conditions,the laminar-to­ turbulent boundary layer transition region was measured...
Proceedings Papers

Paper presented at the SNAME 14th Chesapeake Sailing Yacht Symposium, January 29–30, 1999
Paper Number: SNAME-CSYS-1999-013
... -:3JSAILING. \Iii,/ HE 14th CHESAPEAKE SAILING YACHT SYMPOSIUM Wind Tunnel Testing of Offwind Sails Robert Ranzenbach, GLM Wind Tunnel, Univ. ofMaryland, College Park, Maryland, USA Chris Mairs, GLM Wind Tunnel, Univ. ofMaryland, College Park, Maryland, USA 1.0ABSTRACT 3.0BACKGROUND The primary...
Proceedings Papers

Paper presented at the SNAME 13th Chesapeake Sailing Yacht Symposium, January 24–25, 1997
Paper Number: SNAME-CSYS-1997-016
... Tunnel (GLMWT), located at the University of Maryland College Park, is participating in this sail force prediction project as part of the US SAILING University Research Program. The GLMWT effort is primarily in three areas which will be described in detail: 1.Development and evaluation of advanced wind...
Proceedings Papers

Paper presented at the SNAME 13th Chesapeake Sailing Yacht Symposium, January 24–25, 1997
Paper Number: SNAME-CSYS-1997-003
... because of the large number of variables, not take into account the many variables of sail shape. which most wind tunnels can not easily simulate. For A very high quality estimate of performance is example the scale effects of cloth stretch and varying available only to deep-pocketed syndicates competing...

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