Velocity Prediction of Wing-Sailed Hydrofoiling Catamarans
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
Performance of Wing Sail with Multi Element by Two-Dimensional Wind
Bulletin of the JSME Vol.10, No.2, 2015 Journal of Fluid Science and Technology Performance of wing sail with multi element by two- dimensional wind tunnel investigations Hiroyuki FURUKAWA*, Alexander W. BLAKELEY **, Richard G.J. FLAY ** and Peter J. RICHARDS ** * Department of Mechanical Engineering, Meijo University 1-501 Shiogamaguchi, Tenpaku-ku, Nagoya 468-8502, Japan E-mail: [email protected] **Department of Mechanical Engineering, University of Auckland 314-390 Khyber Pass Road, Auckland, New Zealand Received 30 April 2015 Abstract Following the 33rd America's Cup which featured a trimaran versus a catamaran, and the recent 34th America's Cup in 2013 featuring AC72 catamarans with multi-element wing sail yachts sailing at unprecedented speeds, interest in wing sail technology has increased substantially. Unfortunately there is currently very little open peer- reviewed literature available witha focus on multi-element wing design for yachts. The limited available literature focuses primarily on the structures of wings and their control, rather than on the aerodynamic design. While there is substantial available literature on the aerodynamic properties of aircraft wings, the differences in the flow domains between aeroplanes and yachts is significant. A yacht sail will operate in a Reynolds number range of 0.2 to 8 million while aircraft operate regularly in excess of 10 million. Furthermore, yachts operate in the turbulent atmospheric boundary layer and require high maximum lift coefficients at many apparent wind angles, and minimising drag is not so critical. This paper reviews the literature onwing sail design for high performance yachts and discusses the results of wind tunnel testing at the Yacht Research Unit at the University of Auckland. -
NS14 ASSOCIATION NATIONAL BOAT REGISTER Sail No. Hull
NS14 ASSOCIATION NATIONAL BOAT REGISTER Boat Current Previous Previous Previous Previous Previous Original Sail No. Hull Type Name Owner Club State Status MG Name Owner Club Name Owner Club Name Owner Club Name Owner Club Name Owner Club Name Owner Allocated Measured Sails 2070 Midnight Midnight Hour Monty Lang NSC NSW Raced Midnight Hour Bernard Parker CSC Midnight Hour Bernard Parker 4/03/2019 1/03/2019 Barracouta 2069 Midnight Under The Influence Bernard Parker CSC NSW Raced 434 Under The Influence Bernard Parker 4/03/2019 10/01/2019 Short 2068 Midnight Smashed Bernard Parker CSC NSW Raced 436 Smashed Bernard Parker 4/03/2019 10/01/2019 Short 2067 Tiger Barra Neil Tasker CSC NSW Raced 444 Barra Neil Tasker 13/12/2018 24/10/2018 Barracouta 2066 Tequila 99 Dire Straits David Bedding GSC NSW Raced 338 Dire Straits (ex Xanadu) David Bedding 28/07/2018 Barracouta 2065 Moondance Cat In The Hat Frans Bienfeldt CHYC NSW Raced 435 Cat In The Hat Frans Bienfeldt 27/02/2018 27/02/2018 Mid Coast 2064 Tiger Nth Degree Peter Rivers GSC NSW Raced 416 Nth Degree Peter Rivers 13/12/2017 2/11/2013 Herrick/Mid Coast 2063 Tiger Lambordinghy Mark Bieder PHOSC NSW Raced Lambordinghy Mark Bieder 6/06/2017 16/08/2017 Barracouta 2062 Tiger Risky Too NSW Raced Ross Hansen GSC NSW Ask Siri Ian Ritchie BYRA Ask Siri Ian Ritchie 31/12/2016 Barracouta 2061 Tiger Viva La Vida Darren Eggins MPYC TAS Raced Rosie Richard Reatti BYRA Richard Reatti 13/12/2016 Truflo 2060 Tiger Skinny Love Alexis Poole BSYC SA Raced Skinny Love Alexis Poole 15/11/2016 20/11/2016 Barracouta -
On the Instabilities of Tropical Cyclones Generated by Cloud Resolving Models
SERIES A DYANAMIC METEOROLOGY Tellus AND OCEANOGRAPHY PUBLISHED BY THE INTERNATIONAL METEOROLOGICAL INSTITUTE IN STOCKHOLM On the instabilities of tropical cyclones generated by cloud resolving models By DAVID A. SCHECTERÃ, NorthWest Research Associates, Boulder, CO, USA (Manuscript received 30 May 2018; in final form 29 August 2018) ABSTRACT An approximate method is developed for finding and analysing the main instability modes of a tropical cyclone whose basic state is obtained from a cloud resolving numerical simulation. The method is based on a linearised model of the perturbation dynamics that distinctly incorporates the overturning secondary circulation of the vortex, spatially inhomogeneous eddy diffusivities, and diabatic forcing associated with disturbances of moist convection. Although a general formula is provided for the latter, only parameterisations of diabatic forcing proportional to the local vertical velocity perturbation and modulated by local cloudiness of the basic state are implemented herein. The instability analysis is primarily illustrated for a mature tropical cyclone representative of a category 4 hurricane. For eddy diffusivities consistent with the fairly conventional configuration of the simulation that generates the basic state, perturbation growth is dominated by a low azimuthal wavenumber instability having greatest asymmetric kinetic energy density in the lower tropospheric region of the inner core of the vortex. The characteristics of the instability mode are inadequately explained by nondivergent 2D dynamics. Moreover, the growth rate and modal structure are sensitive to reasonable variations of the diabatic forcing. A second instability analysis is conducted for a mature tropical cyclone generated under conditions of much weaker horizontal diffusion. In this case, the linear model predicts a relatively fast high-wavenumber instability that is insensitive to the parameterisation of diabatic forcing. -
DEPARTMENT of the TREASURY 31 CFR Part 33 RIN 1505-AC72 DEPARTMENT of HEALTH and HUMAN SERVICES 45 CFR Parts 155 and 156 [CMS-99
This document is scheduled to be published in the Federal Register on 01/19/2021 and available online at federalregister.gov/d/2021-01175, and on govinfo.gov[Billing Code: 4120-01-P] DEPARTMENT OF THE TREASURY 31 CFR Part 33 RIN 1505-AC72 DEPARTMENT OF HEALTH AND HUMAN SERVICES 45 CFR Parts 155 and 156 [CMS-9914-F] RIN 0938-AU18 Patient Protection and Affordable Care Act; HHS Notice of Benefit and Payment Parameters for 2022; Updates to State Innovation Waiver (Section 1332 Waiver) Implementing Regulations AGENCY: Centers for Medicare & Medicaid Services (CMS), Department of Health & Human Services (HHS), Department of the Treasury. ACTION: Final rule. SUMMARY: This final rule sets forth provisions related to user fees for federally-facilitated Exchanges and State-based Exchanges on the Federal Platform. It includes changes related to acceptance of payments by issuers of individual market Qualified Health Plans and clarifies the regulation imposing network adequacy standards with regard to Qualified Health Plans that do not use provider networks. It also adds a new direct enrollment option for federally-facilitated Exchanges and State Exchanges and implements changes related to section 1332 State Innovation Waivers. DATES: These regulations are effective on March 15, 2021. FOR FURTHER INFORMATION CONTACT: Jeff Wu, (301) 492-4305, Rogelyn McLean, (301) 492-4229, Usree Bandyopadhyay, (410) 786-6650, Grace Bristol, (410) 786-8437, or Kiahana Brooks, (301) 492-5229, for general information. Aaron Franz, (410) 786-8027, for matters related to user fees. Robert Yates, (301) 492-5151, for matters related to the direct enrollment option for federally-facilitated Exchange states, State-based Exchanges on the Federal Platform, and State Exchanges. -
Update Emirates Team New Zealand 2 / 4
UPDATE February 15 , 2019 Emirates Team New Zealand maxon motor Australia is Official Supplier to Emirates Team New Zealand. We follow their progress and will give regular updates on their journey to Defend the America’s Cup. Emirates Team New Zealand 15 February , 2019. THE UNTOLD STORY OF THE BIRTH OF FOILING IN THE AMERICA'S CUP. In late August 2012 a grainy photo of a boat emerged online. Most hardened America’s Cup follow- ers will clearly remember the image that was the talk of the sailing world for many weeks. A high angle shot, looking down on a giant 72 foot red and black Emirates Team New Zealand catamaran seemingly flying above the waters of the Auckland’s Waitemata Harbour. Debate raged: “OMG photoshopped of course,” “Can't be foiling - anyone can see fro m that picture they're simply launched off a wave.” “On close inspection it is photoshop. You can see where the bow and stern were in the water. They have cut, lifted an pushed the boat forward 1/2 a boat length. Shame. That was cool for about 5 min” An image that was so far outside the realms of the imagination of most people - but not those inside the base of Emirates Team New Zealand. The cat was out of the bag, foiling had arrived. But there had been many months of secretive R&D meet- ings at Emirates T eam New Zealand that went into developing a concept that would transform the world of America’s Cup racing forever. Rewind to 2011, two years out from the 34th America’s Cup in San Francisco. -
Numerical Simulations of a Surface Piercing A- Class Catamaran Hydrofoil and Comparison Against Model Tests
Journal of Sailing Technology, Article 2017-04. © 2017, The Society of Naval Architects and Marine Engineers. NUMERICAL SIMULATIONS OF A SURFACE PIERCING A- CLASS CATAMARAN HYDROFOIL AND COMPARISON AGAINST MODEL TESTS Thilo Keller TU Berlin, Berlin, Germany Juryk Henrichs DNV GL SE, Potsdam, Germany Dr. Karsten Hochkirch Downloaded from http://onepetro.org/jst/article-pdf/2/01/1/2205567/sname-jst-2017-04.pdf by guest on 27 September 2021 DNV GL SE, Potsdam, Germany Dr. Andrés Cura Hochbaum TU Berlin, Berlin, Germany Manuscript received March 1, 2017; accepted April 4, 2017. Abstract: Hydrofoil supported sailing vessels gained more and more importance within the last years. Due to new processes of manufacturing, it is possible to build slender section foils with low drag coefficients and heave stable hydrofoil geometries are becoming possible to construct. These surface piercing foils often tend to ventilate and cause cavitation at high speeds. The aim of this work is to define a setup to calculate the hydrodynamic forces on such foils with RANS CFD and to investigate whether the onset of ventilation and cavitation can be predicted with sufficient accuracy. Therefore, a surface piercing hydrofoil of an A-Class catamaran is simulated by using the RANS software FineMarine with its volume of fluid method. The C-shaped hydrofoil is analyzed for one speed at Froude Number 7.9 and various angles of attack (AoA) by varying rake and leeway angle in ranges actually used while sailing. In addition, model tests were carried out in the K27 cavitation tunnel of TU-Berlin, for the given hydrofoil and in the same conditions as simulated with CFD to provide data for validation. -
America's Cup 34
THE BAR ASSOCIATION OF SAN FRANCISCO/SUMMER 2012 HANSON BRIDGETT REPRESENTS Inside... LEGAL SERVICES FOR VETERANS AMERICA’S CUP 34 BASF’S COURT PROGRAMS CALIFORNIA JUDICIAL APPOINTMENTS CHOOSING A FORENSIC PSYCHIATRIC EXPERT Plus... U.S. SUPREME COURT USE OF CAMERAS, CYCLING FOR TRANSPORTATION AND FUN, REVIEW OF RECENT TAX CASES, AND MORE n August 2011, Andrew Giacomini, managing part- Cup and new properties such as the America’s Cup World ner of Hanson Bridgett, found himself on an AC45 Series events,” said Sam Hollis, general counsel, America’s wing-sailed catamaran, racing along the waters of the Cup Event Authority. “The depth and breadth of Hanson HANSON BRIDGETT: Estoril coast in Cascais, Portugal. As a guest racer on Bridgett’s expertise provides us with a tremendous foun- one of the French sailboats, he had one of the best dation to support our operations as we grow in San Fran- Iseats in the house for the first race of the America’s Cup cisco and around the world.” OFFICIAL OUTSIDE COUNSEL World Series. Nearly 160 years old, the America’s Cup is the oldest tro- TO THE AMERICA’S CUP That’s just one of the perks of being the official outside phy in international sport. The event features the best sail- Nina Schuyler counsel to the America’s Cup. ors on the world’s fastest boats, the wing-sailed AC45 and AC72 catamarans. In June 2011, Hanson Bridgett won the three-year contract to serve as official law firm to the 34th Ameri- ca’s Cup. With more than 150 lawyers, headquartered in A WIDE RANGE OF LEGal ISSUES ........... -
Next Big Thing They’D Logged Fewer Than10hoursofsailinginnewport Over New Carbon-Fiber Machine and No One Was Sure What to Expect
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ -
International Dredging Review JULY/AUGUST 2009 VOLUME 28, NUMBER 4
International Dredging Review JULY/AUGUST 2009 VOLUME 28, NUMBER 4 IN THIS ISSUE: Sand and Gravel Dredging A capping project is a major customer for Wisconsin producers. Page 6 The high-profile Hudson River cleanup project proceeds – carefully. Page 14 Recovery dredging projects are running full tilt. Contract Awards starting on page 17. Vortex Marine’s DB Vengeance working in the Richmond, California entrance channel on a misty July afternoon. Story on page 12. On the Cover: BUILDING THE PUMPOUT SYSTEM Description courtesy of Manson Construction Vortex Marine Construction Using DB Vengeance In recent years, in-water disposal has At Richmond Entrance Channel Maintenance become more and more of an environmental concern in the San Francisco Bay area, and all Dredged Material Is Used for Marsh Creation parties involved have been searching for alter- feet wide. Despite its size, the project only native disposal sites. More than 90 percent of includes 150,000 cubic yards of material and the Bay’s marsh and wetlands have disap- another 100,000 of possible overdepth materi- peared through development. al, because the depth of the siltation overall is The U.S. Army Corps of Engineers, in part- not that great, explained Dave Doak, San nership with the California State Coastal Francisco District Senior Project Manager for Conservancy and the Port of Oakland, have the Richmond job. developed the Hamilton Wetlands Restoration The dredge is loading into two 3000-cubic- Project (HWRP) to address these two environ- yard closed hopper barges for transport to the mental concerns. The project takes dredged Liberty Offloader, which is moored 10 miles material from the Ports of Oakland and from Richmond and five miles offshore from Richmond and deposits it for beneficial re-use the Hamilton Wetlands. -
Design of a Free-Rotating Wing Sail for an Autonomous Sailboat
DEGREE PROJECT IN VEHICLE ENGINEERING, SECOND CYCLE, 30 CREDITS STOCKHOLM, SWEDEN 2017 Design of a free-rotating wing sail for an autonomous sailboat CLAES TRETOW KTH ROYAL INSTITUTE OF TECHNOLOGY SCHOOL OF ENGINEERING SCIENCES ! ! ! ! Design of a free-rotating wing sail for an autonomous sailboat Claes Tretow ! ! ! ! ! ! ! ! ! ! Degree Project in Naval Architecture (30 credits) Degree Programme in Naval Architecture (120 credits) Degree Programme in Vehicle Engineering (300 credits) The Royal Institute of Technology 2017 Supervisors: Jakob Kuttenkeuler, Mikael Razola Examiner: Jakob Kuttenkeuler ! ! 2 Abstract There is an accelerating need for ocean sensing where autonomous vehicles can play a key role in assisting engineers, researcher and scientists with environmental monitoring and colleting oceanographic data. This thesis is performed in collaboration with a research group at The Royal Institute of Technology that currently develops an autonomous sailboat to be used as a sensor carrying platform for autonomous data acquisition in the Baltic Sea. This type of vehicle has potentials to be a helpful and cheaper alternative to a commercial research vessel. The thesis presents the design, construction and experimental testing of a rigid free-rotating wing sail for this autonomous sailboat. The goal is to design a rig that can sustain under all occurring weather conditions in the Baltic sea while ensuring sailing performance, robustness, reliability and low power consumption, which are key aspects driving the design. The rig is designed through the utilization of analysis and design methods involving a Vortex Lattice Method combined with a Velocity Prediction Program in order to achieve best possible aerodynamic performance with respect to the application requirements. -
Americas-Cup- September-Showdown-665X475.Jpg
BOĞAZİÇİ ÜNİVERSİTESİ YELKEN TAKIMI America’s Cup 3* Yelkenci Makalesi Baransel Soysal Eylül 2014 Başlarken ........................................................................................................................................................... 3 1. Giriş ............................................................................................................................................................. 4 1.1. America’s Cup’ın Doğuşu ................................................................................................................................. 4 1.2. Deed of Gift ........................................................................................................................................................ 5 2. America’s Cup Serüveni ........................................................................................................................... 7 2.1. Tarihte İlk America’s Cup Yarışı ...................................................................................................................... 7 2.2. İlk Meydan Okumalar ....................................................................................................................................... 7 2.3. Lipton Devri ........................................................................................................................................................ 8 2.4. Savaş Sonrası Dönem ....................................................................................................................................... -
Cup Heads in Radical New Direction
AmericA’s cup Taking the sport to a broader audience is at the heart of the new plans. Minimising delays to racing What will an AC72 look like? Wingsail or soft sails: the AC72 forms one of the cornerstones of The next generation of America’s Cup boats will be catamarans designed to a tight class rule allows for wingsail Wind the new-style Cup. According to box rule and weighing just one third the weight of their monohull predecessors, and soft sail options to promote Cup heads in radical Coutts, to achieve this, boats would yet flying considerably more sail area with top speeds above 30 knots. racing through a broad range of need to be sailed at more reliable conditions venues over a wider wind range, LOA 22.00m 72ft from three to 33 knots and courses Beam 14.00m 46ft n The n needed to be easier to set up and Displacement 5,700kg 12,500lb Ease of assembly: the AC72 can O new direction change to suit the weather. All-up weight 7,000kg 15,500lb be assembled in two days and Wingmasted cats and a World Series? It’s the most ambitious shake-up yet in the Wingsail area 260m2 2,800ft2 disassembled in one to two days world’s oldest international sporting trophy, but at what price? Matthew Sheahan Inspiring to young sailors Wingsail height 40m 130ft to accommodate the shipping The boats themselves need to be Wingsail chord 8.5m 28ft schedule for the America’s Cup reports on the major changes for the next America’s Cup exciting to watch, demanding to Crew 11 World Series events sail and inspirational for younger Sail trimming No mechanically powered systems he 34th America’s Cup will be More varied legs, including generations of sailors.