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Full-Text Articles in Engineering
A Measuring System For Simultaneous Current, Wave And Ice Action On Offshore Structures, Yuxi Zhang
A Measuring System For Simultaneous Current, Wave And Ice Action On Offshore Structures, Yuxi Zhang
Link Foundation Ocean Engineering and Instrumentation Fellowship Reports
The design, fabrication and installation of a n Ice Force Measuring System (IFMS) were completed with partial support from the Department of Energy sponsored project entitled Measurement and Analysis of Extreme Wave and Ice Actions in the Great Lakes for Offshore Wind Platform Design in the fall of 2013 for ope rations during the winter of 2013 2014. The instrumentation was deployed in Lake Superior on a Keweenaw Peninsula lighthouse, where a large scale laboratory for cold regions engineering experimentation is naturally formed. A data acquisition system capture d readings from strain gauges encased in the IFMS plate and ice …
Interactive Training Of Teleoperated Robotic System For Real-Time Mriguided Steerable Needle Intervention, Gang Li
Link Foundation Modeling, Simulation and Training Fellowship Reports
Needle-based interventions, also known as percutaneous interventions, are common approaches for diagnostic and therapeutic procedures including tissue biopsy, delivery of therapeutic agents and tumor ablation. Needle steering, controlling the rotation of needle while inserting, is a clinical technique to produce a curved path to avoid anatomical obstacles (e.g. vasculature and bones) or compensate for placement errors. But, it requires delicate skills and long-term training to accurately steer the needle, due to difficult control of the needle path and lack of intraoperative image feedback. The objective of the proposed project is to develop a clinician-controlled teleoperated robotic system to train and …
Numerical Simulation Of Tip Clearance Impact On A Pumpjet Propulsor, Lin Lu, Guang Pan, Jing Wei, Yipeng Pan
Numerical Simulation Of Tip Clearance Impact On A Pumpjet Propulsor, Lin Lu, Guang Pan, Jing Wei, Yipeng Pan
Ocean Engineering and Marine Sciences Faculty Publications
Numerical simulation based on the Reynolds Averaged NaviereStokes (RANS) Computational Fluid Dynamics (CFD) method had been carried out with the commercial code ANSYS CFX. The structured grid and SST keu turbulence model had been adopted. The impact of noncondensable gas (NCG) on cavitation performance had been introduced into the Schnerr and Sauer cavitation model. The numerical investigation of cavitating flow of marine propeller E779A was carried out with different advance ratios and cavitation numbers to verify the numerical simulation method. Tip clearance effects on the performance of pumpjet propulsor had been investigated. Results showed that the structure and characteristics of …
Impacts Of Bias Correction Of Wind Forecasts On Hydrodynamic And Wave Model Predictions, Robert J. Weaver, Peyman Taeb, Bryan P. Holman, Steven M. Lazarus, Michael E. Splitt, Atousa Saberi, Jeff Colvin
Impacts Of Bias Correction Of Wind Forecasts On Hydrodynamic And Wave Model Predictions, Robert J. Weaver, Peyman Taeb, Bryan P. Holman, Steven M. Lazarus, Michael E. Splitt, Atousa Saberi, Jeff Colvin
Ocean Engineering and Marine Sciences Faculty Publications
High-resolution hydrodynamic models are forced by surface wind output from operational met. models. Current suite of operational met. models do not have the spatial resolution needed to resolve the fine scale processes associated with complex estuarine wind-driven circulation nor a detailed land-water mask. Goal: improve forecast wind forcing in most efficient manner as possible
Cfd Prediction And Simulation Of A Pumpjet Propulsor, Lin Lu, Guang Pan, Prasanta K. Sahoo
Cfd Prediction And Simulation Of A Pumpjet Propulsor, Lin Lu, Guang Pan, Prasanta K. Sahoo
Ocean Engineering and Marine Sciences Faculty Publications
In this study an attempt has been made to study the hydrodynamic performance of pumpjet propulsor. Numerical investigation based on the Reynolds Averaged NaviereStokes (RANS) computational fluid dynamics (CFD) method has been carried out. The structured grid and SST keu turbulence model have been applied. The numerical simulations of open water performance of marine propeller E779A are carried out with different advance ratios to verify the numerical simulation method. Results show that the thrust and the torque are in good agreements with experimental data. The grid independent inspection is applied to verify accuracy of numerical simulation grid. The numerical predictions …
Optimal Configuration And Tuning Of Wave Energy Converter Arrays, Emma Edwards
Optimal Configuration And Tuning Of Wave Energy Converter Arrays, Emma Edwards
Link Foundation Ocean Engineering and Instrumentation Fellowship Reports
Power from ocean waves is becoming an increasingly attractive option as a source of renewable energy. Ocean waves are more reliable and predictable than sun and wind, and have a higher energy density [1]. There are locations where solar and wind energy would not be viable, due to the large amount of space they take up, either on land (solar) or above ground (wind). In addition, wave energy devices are less of a visual deterrent than wind turbines, and wave energy is particularly attractive for areas with a lot of coast line. Wave energy is still in its infancy, though, …
A Shipboard Instrument For Underway Estimates Of Marine N2 Fixation, Weiyi Tang
A Shipboard Instrument For Underway Estimates Of Marine N2 Fixation, Weiyi Tang
Link Foundation Ocean Engineering and Instrumentation Fellowship Reports
Marine N2 fixation converts nitrogen gas into ammonia and accounts for the largest external nitrogen input to the oceans1. Since large portions of the global oceans are nitrogen deficient, marine N2 fixation can relieve the nitrogen limitation, thereby increasing the growth of phytoplankton and stimulating biological uptake of atmospheric carbon dioxide2,3,4. However, the magnitude and distribution of marine N2 fixation are poorly constrained5. In addition, the environmental controls on marine N2 fixation remain elusive6. This situation is in part attributable to the limited number of observations and poor coverage of marine N2 fixation measurements. Current observations rely on discrete sampling …