Design of the University of New Orleans Ship-Offshore University Laboratory for Offshore Industry Support

1988 ◽  
Vol 110 (3) ◽  
pp. 133-140 ◽  
Author(s):  
R. Latorre
Keyword(s):  
New Orleans ◽  
Water Current ◽  
Offshore Structure ◽  
Water Research ◽  
Towing Tank ◽  
Calm Water ◽  
Tank Design ◽  
Offshore Industry ◽  
The University ◽  
University Laboratory

On July 23, 1987, the University of New Orleans (UNO) dedicated its new Engineering Building, which houses a 38.3 m×4.57 m×0–2.134 m deep ship-offshore university laboratory tow tank. This paper covers the initial stages of the project and summarizes the towing tank design for ship-offshore testing. The tank is configured for three purposes: 1) conventional ship research in deep water with calm water or waves; 2) offshore structure testing with provision for observation and anchoring; 3) shallow water research in calm water, current, and waves.

Water Waves and Marine Structure Interaction

2004 ◽  
Author(s):  
Octavi Sado´ Garriga ◽  
Jeffrey M. Falzarano
Keyword(s):  
Free Surface ◽  
New Orleans ◽  
Water Waves ◽  
Frequency Estimation ◽  
Experimental Results ◽  
Oscillating Water Column ◽  
Towing Tank ◽  
Structure Interaction ◽  
Marine Structure ◽  
The University

The purpose of this paper is to combine and extend existing potential flow theory in order to analyze the linear free surface problem of an Oscillating Water Column (OWC) device and apply it to moonpool design. Analytical results were obtained implementing the previously derived theories, and later compared to experimental results conducted at the University of New Orleans Towing Tank. The model tests consisted of a study of a cylindrical OWC. The theoretical and experimental results of the free surface for the OWC tests agree for the resonant frequency estimation response but they disagree on the amplitude of the response.

Investigation on the Effects of Risers in the Dynamics of Floating Systems

2010 ◽  
Author(s):  
Felipe Rateiro ◽  
Edgard Borges Malta ◽  
Andre´ L. C. Fujarra ◽  
Daniel Prata Vieira ◽  
Kazuo Nishimoto
Keyword(s):  
Dynamic Behavior ◽  
Large Diameter ◽  
Model Tests ◽  
Towing Tank ◽  
Dynamic Simulator ◽  
Offshore Industry ◽  
Technological Research Institute ◽  
The University ◽  
Floating Systems ◽  
Significant Increment

This paper presents the experimental results obtained from the model tests performed at the IPT (State of Sa˜o Paulo Technological Research Institute) towing tank, located in Sa˜o Paulo, Brazil. The model used was the semi-submersible ITTC-SR192, at a scale 1:105. The main focus of this study is the analysis of the risers influence on the floating unit dynamics, taking into account damping effects caused by the lines. In order to establish basis of comparison the tests were performed with and without risers. These were modeled as a group of large diameter hoses that are able to provide a significant increment in the damping of the system. By such approach, it was possible to evaluate the changes on the dynamic behavior of the unit induced by the presence of risers. As an additional investigation tool, these results were analyzed with the aid of the software Numerical Offshore Tank (Tanque de Provas Nume´rico - TPN), which is a dynamic simulator of offshore systems based on parallel-processing developed by means of a partnership between the University of Sa˜o Paulo, Petrobras and other Brazilian research institutions. By means of the comparisons between the model tests results with and without risers and of the results from the numerical tool, TPN, the dynamic behavior of the floating unit was investigated in terms of the effects caused by the presence of risers, which is a very relevant subject as offshore industry walks towards ultra-depth waters.

Water Wave Interaction on a Truncated Vertical Cylinder

2008 ◽  
Vol 130 (3) ◽  
Author(s):  
Octavi Sadó Garriga ◽  
Jeffrey M. Falzarano
Keyword(s):  
Free Surface ◽  
New Orleans ◽  
Frequency Estimation ◽  
Vertical Cylinder ◽  
Wave Interaction ◽  
Experimental Results ◽  
Oscillating Water Column ◽  
Towing Tank ◽  
The University ◽  
Moon Pool

The purpose of this paper is to combine and extend existing potential flow theory in order to analyze the linear free surface problem of an oscillating water column (OWC) device and apply it to moon pool design. Analytical results were obtained implementing the previously derived theories, and later compared to experimental results conducted at the University of New Orleans Towing Tank. The model tests consisted of a study of a cylindrical OWC. The theoretical and experimental results of the free surface for the OWC tests agree for the resonant frequency estimation response but they disagree on the amplitude of the response.

An Evaluation of Planing Boat Trim Measurements

2017 ◽  
Author(s):  
Carolyn Judge ◽  
Bill Beaver ◽  
John Zseleczk
Keyword(s):  
Performance Prediction ◽  
Measurement Methods ◽  
The Other ◽  
Test Program ◽  
Towing Tank ◽  
Calm Water

The resistance of a planing hull is known to be highly dependent on trim angle. For several reasons, trim is difficult to measure to the level of accuracy normally attained with other towing tank measurements such as resistance or speed. In a recent study intended to validate CFD methods for planing hulls, 4’ and 8’ long geosim models of the Generic Prismatic Planing Hull (GPPH) were built and tested at USNA. Significant differences were found between the trim of the two models so a separate test program was conducted which focused specifically on the trim measurement of these two models in calm water. Five different trim measurement methods were used simultaneously on one model and then used again on the other model. Trim angles were compared between measurement methods and between models. Trim measurements with the same model agreed well and are the basis for an evaluation of measurement methods. The trim measured on the two different size models did not agree well even though the same instruments were used in most cases. The paper discusses reasons for the confirmed differences in calm water running trim of the two models and suggests ways to take advantage of this knowledge to make the best use of towing tank tests for planing boat performance prediction.

SHAFT LOADS ON AZIMUTH PROPULSORS IN OBLIQUE FLOW AND WAVES

2021 ◽  
Vol 153 (A1) ◽  
Author(s):  
H Amini ◽  
S Steen
Keyword(s):  
Mechanical Design ◽  
Bending Moment ◽  
Ship Hull ◽  
Propeller Shaft ◽  
Towing Tank ◽  
Oblique Flow ◽  
Straight Line ◽  
Calm Water ◽  
Bending Loads ◽  
Marine Technology

A range of model experiments have been carried out in calm water and waves for an oil spill vessel model with twin tractor azimuth thrusters at different heading angles and advance coefficients in the large towing tank at the Marine Technology Centre in Trondheim, Norway. Propeller shaft bending loads have been measured using a shaft dynamometer capable of measuring all shaft side force and bending moment components as well as propeller torque and thrust. The results include the loads on the propeller shaft with and without the presence of a ship hull model at the same heading angles and advance velocities in order to study the wake influence from the ship hull on the hydrodynamic loads. Results show that the ship hull wake has a much stronger effect on the propeller loads when the propeller is azimuthed outward from the ship hull centreline than inward. Measurements from the experiments in waves are also presented for the same thruster model in a straight-line course for both the head and following sea states under different wave conditions. Larger bending loads are found in head sea conditions compared with the following sea conditions. Generally it is found that the shaft bending loads and lateral forces are quite large, which is important to consider in the mechanical design layout and for dimensioning of components.

Preparing A Hospitality Program To Become A Program of Excellence

1988 ◽  
Vol 12 (2) ◽  
pp. 473-473
Author(s):  
Thomas W. Calnan ◽  
Harsha E. Chacko ◽  
Eddystone C. Nebel ◽  
Jeffrey D. Schaffer ◽  
G. Kent Stearns
Keyword(s):  
New Orleans ◽  
Education Program ◽  
Hospitality Education ◽  
Center Of Excellence ◽  
Important Benefit ◽  
Quality Faculty ◽  
Academic Recognition ◽  
National Reputation ◽  
The University

The School of Hotel, Restaurant and Tourism Administration at the University of New Orleans was declared a Center of Excellence on Nov. 22,1987 by Chancellor Gregory M. St. L. O'Brien. The faculty of the School were asked to prepare adetailed proposal for a plan of action that would propel the University of New Orleans' hospitality education program into national prominence. In a review of the nation's 10 leading hospitality programs itwas determined, that in order to acquire a national reputation three missions must be met. These are: 1) alumni success, 2) academic recognition, and 3) industry recognition. The high visibility of a program that has been declared a center of excellence results in many benefits to a program. The most important benefit is budgetary priority. However, other benefits that accrue include recruitment of excellent students, increased industry support, community recognition and attracting quality faculty.

Experimental Investigation on Resistance Reduction by Means of Air-Bubbling Technique

2018 ◽  
Author(s):  
Enrico Ravina ◽  
Sofia Guidomei
Keyword(s):  
Flow Rate ◽  
Low Cost ◽  
Frictional Resistance ◽  
Flat Plates ◽  
Research Activity ◽  
Frictional Drag ◽  
Towing Tank ◽  
Resistance Reduction ◽  
The University ◽  
Different Levels

The paper refers on a research activity, focused at DREAMS Lab of the University of Genoa (Italy) and still under development, oriented to experimental application of air-bubbling techniques on flat plates and hull models. In this study the reduction in the frictional resistance by air bubbling generated by customized pneumatic circuits is tested, both on the lower surfaces of flat plates characterized of different geometries of holes and on a hull model tested in towing tank. The effective shape of air bubbles is observed, and changes in the local frictional drag are measured, using flexible and low cost thin sensors at different levels of flow rate and pressure of injected air. In towing tank tests the experiments compare hull without and with holes on the bottom, modifying the characteristics of speed, pressure, flow rate and areas interested to the air injection. Systematic tests campaign has been developed, using also actuation pneumatic workbenches expressly designed for the experiments.

Thorough Verification and Validation of CFD Simulation for FPSO Roll Damping

2019 ◽  
Author(s):  
Donghwan Lee ◽  
Zhenjia (Jerry) Huang
Keyword(s):  
Numerical Modeling ◽  
Cfd Simulation ◽  
Development Project ◽  
Model Tests ◽  
Design Tool ◽  
Verification And Validation ◽  
Empirical Formulas ◽  
Roll Damping ◽  
Calm Water ◽  
Offshore Industry

Abstract For floating production platform such as FPSO and FLNG, it is important to use confidently estimated roll damping coefficients in the prediction of its motions in waves since in many cases the roll response is mainly contributed from resonance. Traditionally roll damping prediction was made through model tests or empirical formulas. As computing power and numerical modeling techniques have been improved during last a few decades, offshore industry starts to consider CFD as an alternative engineering and design tool complementary and/or supplementary to physical model tests. This paper presents our verification and validation work of modeling practices with commercially available CFD software for engineering applications for FPSO roll decay damping in calm water. The numerical modeling followed a recommended modeling practice developed by a Joint Development Project – TESK JDP [1].

Recruiting and Graduating Minority Geoscientists from the University of New Orleans

2007 ◽  
Vol 55 (6) ◽  
pp. 560-566 ◽  
Author(s):  
Laura Serpa ◽  
Lisa White ◽  
Terry L. Pavlis
Keyword(s):  
New Orleans ◽  
The University

Living, leaving, and dying for New Orleans—an insider’s perspective on Katrina

2007 ◽  
Vol 5 (2) ◽  
pp. 13
Author(s):  
William Monfredo, PhD
Keyword(s):  
New Orleans ◽  
Gulf Coast ◽  
Flood Damage ◽  
Cultural Issues ◽  
Personal Account ◽  
Flash Flooding ◽  
Imminent Danger ◽  
Climatic Hazards ◽  
The Subject ◽  
The University

This article discusses Hurricane Katrina’s meteorological setting and history, surrounding evacuation issues, and aftermath. The author, who lived in New Orleans for more than three years, taught and researched climatic hazards at the University of New Orleans, and was no stranger to evacuations, began driving to Tucson 18 hours before Katrina’s landfall and returned five months later. The article raises important considerations, including recommendations for the future. The results of flood-damage surveys conducted in Lakeview and the Lower Ninth Ward districts of New Orleans reveal an intriguing aspect: unlike in Lakeview, which filled with water over a period of hours, intense and widespread flash flooding occurred east of the Industrial Canal, yielding damage similar to that from an F4/F5 tornado. Perhaps more importantly, the article explores various reasons for why some people from these areas did not or will not evacuate when faced with imminent danger. Analyzing the events leading up to and following Katrina’s landfall can help us understand how such senseless tragedy resulted from several fatal flaws: denial, woeful preparation, and poverty. Given that Gulf Coast residents now live within a climate pattern of enhanced hurricane frequency and intensity compared to the three-decade period pre-1995, the best advice for those asked to evacuate is to just say yes.While this piece reads as a more personal account than most on the subject, it is hoped that it offers an intriguing perspective on the cultural issues impacting evacuations.

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