Results 261 to 270 of about 2,540,315 (302)
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Open Water Swimming Performance
2015Open water swimming is defined as any swimming competition that takes place in rivers, lakes, oceans, or water channels. Since the inclusion of open water swimming as an Olympic event in 2008, it has steadily been gaining popularity worldwide. Many studies have focused on the risks involved in open water swimming events.
Reira Hara, Isao Muraoka
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NUMERICAL ANALYSIS OF FLOATING BOOM PERFORMANCE IN OPEN WATERS
Coastal Engineering 2008, 2009Previously proposed numerical models of oil containment booms have a series of shortcomings. The boom is generally considered as a fixed object and in the few cases in which the main boom motions are implemented into the model, the containment is not taken into account.
A. Castro +3 more
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Open water performance of B-Series marine propellers in tandem configurations
Ocean Engineering, 2021Abstract The hydrodynamic performance of 4-bladed B-series tandem propellers with different design configurations in open water is numerically investigated using a RANS-based CFD solver. The integration of the co-rotating aft propeller increases the resultant thrust and torque coefficients in the entire range of propeller loading.
Sachin Amrut Chavan +2 more
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Performance measures and models for open‐water integrated multi‐trophic aquaculture
Reviews in Aquaculture, 2018AbstractQualifying and quantifying nutrient flows within open‐water Integrated Multi‐Trophic Aquaculture (IMTA) systems is necessary to determine transfer efficiencies and to assess overall system performance. There are numerous empirical performance metrics, such as spatially defined growth and nutrient sequestration, which may have application.
Reid, Gregor K. +6 more
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Computational analysis of self-pitching propellers performance in open water
Ocean Engineering, 2013This paper presents a numerical study on self-pitching propellers (SPP) in open water aimed at the prediction of the performance in terms of equilibrium pitch-setting and delivered thrust and torque. Differently from other types of propeller, SPP-blades are able to freely rotate about the pivot axis up to the spindle moment due to the centrifugal ...
Leone Stefania +3 more
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Performing Riserless Subsea Operations Utilizing Coiled Tubing in Open Water
SPE/ICoTA Coiled Tubing & Well Intervention Conference & Exhibition, 2015Abstract Due to the versatility of modern coiled tubing (CT) operations coupled with the increasing demand for deepwater activity, CT is becoming a common conveyance method to perform subsea operations without the need of a marine riser or lubricator connected to the subsea wellhead. These operations utilize the CT string as an umbilical
Beau Lasseigne, BJ Lindsey, James Larke
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Applying periodic boundary conditions to predict open water propeller performance
Journal of Marine Science and Application, 2010Mathematical models of propellers were created that investigate the influence of periodic boundary conditions on predictions of a propeller’s performance. Thrust and torque coefficients corresponding to different advance coefficients of DTMB 4119, 4382, and 4384 propellers were calculated.
Chao Wang +3 more
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Grid Influence on the Propeller Open-Water Performance and Flow Field
Ship Technology Research, 2008A grid sensitivity study for a conventional propeller in open-water condition uses three grids and compares with experimental data. Thrust and torque are rather insensitive to the grid resolution, but local quantities such as pressure coefficient and velocity are grid sensitive.
Nabila Berchiche, Carl-Erik Janson
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Numerical analysis of ducted propeller performance under open water test condition
Journal of Marine Science and Technology, 2013This paper investigates the open water performance of the Ka-series propellers at various pitch and expanded area ratios in combination with the 19A duct by employing the panel method panMARE and the RANSE code ANSYS-CFX. An efficient method, Caly, is developed in order to generate the 3D-geometry and the surface numerical grid of the ducted propellers.
Yu, Long +3 more
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A practical technique for improvement of open water propeller performance
Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, 2011A practical technique for the improvement of open water propeller performance has been described by using a vortex lattice lifting line method together with a lifting surface method. First, the optimum circulation distribution, giving the maximum thrust–torque ratio, has been computed along the radius of the propeller for given thrust and chord ...
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