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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
... for upwind sails (Miyata & Lee, 1999). The complexity of downwind sail flow also prompted the development of dedicated experimental facilities, namely twisted flow wind tunnels (Flay & Vuletich, 1995), the need for which was highlighted a few years before by Flay & Jackson (1992). One of the benefits...
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 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 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 19th Chesapeake Sailing Yacht Symposium, March 20–21, 2009
Paper Number: SNAME-CSYS-2009-008
... This paper describes a method for the acquisition of the flying shape of spinnakers in a twisted flow wind tunnel. The method is based on photogrammetry. A set of digital cameras is used to obtain high resolution images of the spinnaker from different viewing angles. The images are post...
Proceedings Papers

Paper presented at the SNAME 18th Chesapeake Sailing Yacht Symposium, March 2–3, 2007
Paper Number: SNAME-CSYS-2007-003
... This paper presents a comparison between wind tunnel and full-scale aerodynamic sail force measurements using enhanced wind tunnel testing techniques to model the full-scale sailing conditions more accurately. The first comparison was conducted by Hansen et al., 2003a, in the Twisted Flow Wind...
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
... apparent wind angle spinnaker wind engineering objective camber limitation reynolds number side force downwind sail parametric variation force coefficient thrust coefficient coefficient aspect ratio drag coefficient wind tunnel aerodynamic dynamometer THE 16th CHESAPEAKE...
Proceedings Papers

Paper presented at the SNAME 15th Chesapeake Sailing Yacht Symposium, January 26, 2001
Paper Number: SNAME-CSYS-2001-003
... upwind, downwind, and under tow. The experimental approach described in this paper will be useful for the development and evaluation of various seawater drag reduction methods. ambient turbulence level designer instability wind tunnel frequency pressure gradient reynolds number transition...
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
... side force sail coefficient dinghy designer accuracy coefficient chesapeake sailing yacht symposium dynamometer strain gauge sensor force coefficient wind tunnel calculation rig testing method baybea boat The problem of accurately predicting the performance of a sailing...

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