Ice Blocked Propeller Performance Prediction Using a Panel Method PDF Download
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Author: Neil Bose
Publisher:
ISBN:
Category : Ice navigation
Languages : en
Pages : 31
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Book Description
Author: Neil Bose
Publisher:
ISBN:
Category : Ice navigation
Languages : en
Pages : 31
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Book Description
Author: Dan Walker (engineer.)
Publisher:
ISBN:
Category : Ice navigation
Languages : en
Pages : 30
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Book Description
Author: Weicheng Cui
Publisher: Springer Nature
ISBN: 9811069468
Category : Technology & Engineering
Languages : en
Pages : 2203
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Book Description
This encyclopedia adopts a wider definition for the concept of ocean engineering. Specifically, it includes (1) offshore engineering: fixed and floating offshore oil and gas platforms; pipelines and risers; cables and moorings; buoy technology; foundation engineering; ocean mining; marine and offshore renewable energy; aquaculture engineering; and subsea engineering; (2) naval architecture: ship and special marine vehicle design; intact and damaged stability; technology for energy efficiency and green shipping; ship production technology; decommissioning and recycling; (3) polar and Arctic Engineering: ice mechanics; ice-structure interaction; polar operations; polar design; environmental protection; (4) underwater technologies: AUV/ROV design; AUV/ROV hydrodynamics; maneuvering and control; and underwater-specific communicating and sensing systems for AUV/ROVs. It summarizes the A–Z of the background and application knowledge of ocean engineering for use by ocean scientists and ocean engineers as well as nonspecialists such as engineers and scientists from all disciplines, economists, students, and politicians. Ocean engineering theories, ocean devices and equipment, ocean design and operation technologies are described by international experts, many from industry and each entry offers an introduction and references for further study, making current technology and operating practices available for future generations to learn from. The book also furthers our understanding of the current state of the art, leading to new and more efficient technologies with breakthroughs from new theory and materials. As the land resources approach the exploitation limit, ocean resources are becoming the next choice for the sustainable development. As such, ocean engineering is vital in the 21st century.
Author:
Publisher:
ISBN:
Category : Marine engineering
Languages : en
Pages : 56
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Book Description
Author: Royal Institution of Naval Architects
Publisher:
ISBN:
Category : Naval architecture
Languages : en
Pages : 308
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Book Description
List of members in each volume.
Author: Jungyong Wang
Publisher:
ISBN:
Category : Hulls (Naval architecture)
Languages : en
Pages : 456
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Book Description
Author:
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 846
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Book Description
Author: Hongyang Fan
Publisher:
ISBN:
Category :
Languages : en
Pages : 220
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Book Description
An improved perturbation potential based lower order panel method is applied to the three dimensional problems of flow around ducts and ducted propellers. One significant development of this method is the application of full wake alignment scheme in which the trailing vortex wake sheets of the blades are aligned with the local flow velocity by also considering the effects of duct and duct wake. A process of repaneling the duct is simultaneously introduced to improve the accuracy of evaluation of the method. The results from the improved wake model are compared with those from a simplified wake alignment scheme (PSF-2 type scheme). At the same time, full-blown RANS simulations of the three dimensional problem are conducted. The forces, i.e. thrust and torque on the propeller predicted by the present panel method under the improved wake alignment model show good agreement both with experimental measurements, a hybrid method developed by the Ocean Engineering Group of UT Austin, and the full blown RANS simulations. Moreover, detailed pressure distribution on the blades and duct are compared among the various methods. The interactive method which couples the lower order panel method with a two dimensional boundary layer solver through a wall transpiration model is also introduced. An assumption of two dimensional flow is made on the individual stations of a three dimensional geometries and the coupling is applied in a stripwise manner by including the interaction effects from other strips. The interactive method is then validated through the cases of bare ducts and ducted propellers. An important improvement is also made on the extension scheme for hydrofoils and propeller blades with blunt trailing edge. A more physical criterion has been established for determining the location of cut planes or the starting points of the extension. The extension scheme is applied to both axisymmetric problems and fully three dimensional problems. Correlations of results with experimental measurements and RANS simulations are presented.
Author: Jinzhang Feng
Publisher:
ISBN:
Category : Propellers
Languages : en
Pages : 13
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Book Description
Author: Luksa Luznik
Publisher:
ISBN:
Category : Icebreakers (Ships)
Languages : en
Pages :
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Book Description
"A series of tests on a model of the ice class fixed pitch propeller of the Canadian Coast Guard's R-Class icebreakers were conducted in the towing tank at Memorial University of Newfoundland. Performance of the propeller was assessed in both uniform flow and in blocked flow behind a nearby simulated ice piece for two blockage configurations and a range of clearances between the block and the propeller blades. Measurements of thrust and torque were made over a range of speeds. The results help to isolate the separate effects of the extreme wake within which the propeller operates, and of proximity of the ice piece. The work forms part of a broader research effort examining the performance of propellers when blocked with ice"--Leaf [1].
