Yazar "Çalışal, Sander M." için listeleme
-
Comparison of two base-potentials for a slender-body method
Alidadi, M.; Çalışal, Sander M. (2012)The effects of two base-potentials on the accuracy of a slender-body method are studied in this paper. In the formulation for this method which is developed for the slender ships, the velocity potential is decomposed into ... -
Estimating Power Output from a Tidal Current Turbine Farm with First-order Approximation of Hydrodynamic Interaction between Turbines
Li, Ye; Çalışal, Sander M. (Taylor & Francis Inc, 2010)This article presents a numerical approach to estimate power output from a tidal current turbine farm with first-order approximation of hydrodynamic interactions between multiple turbines. An example study is conducted by ... -
Fuel or acceleration: A pareto design procedure for ships
Çalışal, Sander M. (CRC Press/Balkema, 2018)Ship design, as all other designs, is continuously changing. The design method used in this study is to calculate ship resistance and ship motion with algorithms and then to calculate the dynamic effects such as acceleration, ... -
An Integrated Approach to Increase Marine Transportation Safety in Harbor Areas
Li, Ye; Çalışal, Sander M.; Landsburgh, Alexander C. (Marine Technology Soc Inc, 2017)The importance of marine transportation safety in harbors and waterways access has become a very serious governmental concern in recent years, with the holding of special conferences on major marine disasters, increasing ... -
An integrated model for estimating energy cost of a tidal current turbine farm
Li, Ye; Lence, Barbara J.; Çalışal, Sander M. (Pergamon-Elsevier Science Ltd, 2011)A tidal current turbine is a device for harnessing energy from tidal currents and functions in a manner similar to a wind turbine. A tidal current turbine farm consists of a group of tidal current turbines distributed in ... -
Mathematical programming basis for ship resistance reduction through the optimization of design waterline
Gören, Ömer; Çalışal, Sander M.; Danışman, D. Bülent (Springer Japan Kk, 2017)It has been more than a decade since Calisal et al. (J Ship Res 46(3):208-213, 2002) presented their concept of wave resistance reduction by allowing an increase in the beam of a ship accompanied by smoothing the shoulders. ... -
Modeling of twin-turbine systems with vertical axis tidal current turbine: Part II-torque fluctuation
Li, Ye; Çalışal, Sander M. (Pergamon-Elsevier Science Ltd, 2011)We recently showed the advantage of using a numerical system to extract energy from tidal currents by developing a new twin-turbine model (Li and Calisal, 2010a). Encouraged by this result, we decided to use this model to ... -
Modeling of twin-turbine systems with vertical axis tidal current turbines: Part I-Power output
Li, Ye; Çalışal, Sander M. (Pergamon-Elsevier Science Ltd, 2010)Recent interest in the tidal current industry has driven development of the prototype from the stand-alone turbine to the twin-turbine system. In this paper, we develop a numerical model to systematically analyze the ... -
Multi Objective Design of Ships; A Pareto Procedure
Çalışal, Sander M. (Springer Science and Business Media Deutschland GmbH, 2021)The design calculations for a displacement type vessel and for a planing hull are done for the main dimensions, starting with a fuel and acceleration criteria. A large number of vessels are simulated with the help of ... -
A numerical study on squat of a wigley hull
Alidadi, M.; Çalışal, Sander M. (2011)A numerical study is conducted to calculate the squat for a wigley hull. An approach based on slender body theory is used to convert the three dimensional ship problem into a series of two dimensional problems in cross ... -
On flow fluctuation's impact on the performance of vertical axis turbines-A potential flow analysis
Li, Ye; Çalışal, Sander M. (Amer Inst Physics, 2017)During the last decade, with rapidly increasing deployment of tidal current turbine prototypes in many countries, a number of failures have been reported. Several of these failures were attributed to the intensive flow ... -
Parabolization and structural integrity of side bulb applied to a platform supply vessel
Deli, O.; Gören, Ömer; Çalışal, Sander M. (DTU Mechanical Engineering, Technical University of Denmark, 2016)The waterline parabolization is a hull form-optimization method, Calisal et al. (2002) reported a 10% decrease in the effective horse power at Fr = 0.275 for a coaster tanker. The present study was made for an oil platform ... -
Powering and seakeeping characteristics of a displacement hullform with waterline parabolization
Waterline parabolization is a design procedure used for displacement vessels to decrease the wave resistance of the hullform through the addition of amidships bulbs. The bow and shoulder wave system of a parent hullform ... -
Second-order wave diffraction by horizontal rectangular barriers
Gören, Ömer; Çalışal, Sander M. (2011)A complete second-order analytical solution for the nonlinear diffraction of waves by 2-D rectangular cylinders fixed at the free surface of finite-depth waters is presented. As a sequel to a previous linear treatment of ... -
Three-dimensional effects and arm effects on modeling a vertical axis tidal current turbine
Li, Ye; Çalışal, Sander M. (Pergamon-Elsevier Science Ltd, 2010)Three-dimensional effects in studying a vertical axis tidal current turbine are modeled using a newly developed vortex method. The effects on predicting power output and wake trajectory are analyzed in particular. The ...
