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experimental investigation of the performance of a series of propellers for a human powered underwater vehicle
Title
An experimental investigation of the performance of a series of propellers for a human powered underwater vehicle.
Creator
Heeb, Karl Von., Florida Atlantic University, Dhanak, Manhar R.
Abstract/Description
Designing a propeller for optimum performance on a human powered underwater vehicle presents a significant engineering challenge. The propeller must be highly efficient to utilize the inherently low power output of a human. Also, the propeller must be correctly matched to the maximum sustainable torque of the propulsor. This thesis experimentally investigates a minimum induced loss propeller design program and its application to a human powered underwater vehicle. The design program is based...
Show moreDesigning a propeller for optimum performance on a human powered underwater vehicle presents a significant engineering challenge. The propeller must be highly efficient to utilize the inherently low power output of a human. Also, the propeller must be correctly matched to the maximum sustainable torque of the propulsor. This thesis experimentally investigates a minimum induced loss propeller design program and its application to a human powered underwater vehicle. The design program is based on the vortex theory of propellers. The work includes experimental measurements of the velocity and rotational rate of three propellers designed with the minimum induced loss propeller design program. This positively verifies the output of the design algorithm. Also, the research, through the use of an underwater ergometer, determines the maximum power and torque sustainable by a human pedaling underwater. Final results of the research show that the design algorithm overestimates the blade section angles by 25% because the design program neglects the influence of the wake of the vehicle.
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Date Issued
1994
PURL
http://purl.flvc.org/fcla/dt/15078
Subject Headings
Propellers, Submersibles, Underwater propulsion
Format
Document (PDF)
Aerodynamic analysis of a propeller in a turbulent boundary layer flow
Title
Aerodynamic analysis of a propeller in a turbulent boundary layer flow.
Creator
Lachowski, Felipe Ferreira., Glegg, Stewart A. L., Graduate College
Date Issued
2013-04-12
PURL
http://purl.flvc.org/fcla/dt/3361938
Subject Headings
Turbulent boundary layer, Propellers, Aerodynamics
Format
Document (PDF)
Open water testing of a surface piercing propeller with varying submergence, yaw angle and inclination angle
Title
Open water testing of a surface piercing propeller with varying submergence, yaw angle and inclination angle.
Creator
Lorio, Justin M., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
The use of surface piercing propellers (SPPs) shows promise for high speed operation by virtually eliminating appendage drag, which can be as much as 30 percent of the total drag on a vehicle at high speeds. The scarcity of available systematic test data has made reliable performance prediction difficult. The primary objective of this research is to obtain experimental performance prediction data that can be used in SPP design. In a series of open water tests in a non-pressurized towing tank...
Show moreThe use of surface piercing propellers (SPPs) shows promise for high speed operation by virtually eliminating appendage drag, which can be as much as 30 percent of the total drag on a vehicle at high speeds. The scarcity of available systematic test data has made reliable performance prediction difficult. The primary objective of this research is to obtain experimental performance prediction data that can be used in SPP design. In a series of open water tests in a non-pressurized towing tank facility, force transducer measurements were taken at tip immersion ratios from 0.5 to .33, yaw angles from 0° to 30° and inclination angles from 0° to 15° over a range of advance ratios from 0.8 to 1.8. Force transducer measurements were taken for thrust, torque, side forces and moments. These results will help develop a baseline for the verification of SPP performance prediction.
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Date Issued
2010
PURL
http://purl.flvc.org/FAU/1930498
Subject Headings
Ships, Hydrodynamics, Ship propulsion, Propellers
Format
Document (PDF)
Human powered submarine propulsion
Title
Human powered submarine propulsion.
Creator
Nunes, Christopher, An, Edgar
Date Issued
2013-04-05
PURL
http://purl.flvc.org/fcla/dt/3361161
Subject Headings
Submersibles, Submarines--Design and construction, Propellers
Format
Document (PDF)
Variable pitch propeller design tool development
Title
Variable pitch propeller design tool development.
Creator
Neal, Michael C., Nunes, Christopher, Vidal, Raul, An, Edgar
Date Issued
2012-04-06
PURL
http://purl.flvc.org/fcla/dt/3349038
Subject Headings
Variable Pitch Propellers, Propulsion System Performance, Propeller Blades, Design Engineering, Computer Simulation
Format
Document (PDF)
High efficiency hubless ringpropeller for underwater vehicles
Title
High efficiency hubless ringpropeller for underwater vehicles.
Creator
Holt, John K., Clark, A. M., Harbor Branch Oceanographic Institute
Date Issued
1997
PURL
http://purl.flvc.org/fau/fd/FA00007417
Subject Headings
Harbor Branch Oceanographic Institution, Submersibles, Underwater vehicles, Propellers--Design and construction
Format
Document (PDF)
A specialized ROV for cleaning groundwater recharge basins
Title
A specialized ROV for cleaning groundwater recharge basins.
Creator
Kocak, D. M., Neely, J. W., Holt, John K., Miyake, Michio, Harbor Branch Oceanographic Institute
Date Issued
1999
PURL
http://purl.flvc.org/FCLA/DT/3183713
Subject Headings
Automobiles --Design and construction, Engineering design, Propellers, Experimental automobiles, Remote submersibles
Format
Document (PDF)
A direct thrust measurement system for a waterjet propelled, free running USV
Title
A direct thrust measurement system for a waterjet propelled, free running USV.
Creator
Grimes, John A., von Ellenrieder, Karl, College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
Abstract/Description
The relationship between cross-flow at a waterjet inlet and delivered thrust is not fully understood. A direct thrust measurement system was designed for a waterjet propelled, free running USV. To induce sway velocity at the waterjet inlet, which was considered equivalent to the cross flow, circles of varying radii were performed at Reynolds Numbers between 3.48 x 106 and 8.7 x 106 and radii from 2.7 to 6.3 boat lengths. Sway velocities were less than twenty percent of mean forward speed with...
Show moreThe relationship between cross-flow at a waterjet inlet and delivered thrust is not fully understood. A direct thrust measurement system was designed for a waterjet propelled, free running USV. To induce sway velocity at the waterjet inlet, which was considered equivalent to the cross flow, circles of varying radii were performed at Reynolds Numbers between 3.48 x 106 and 8.7 x 106 and radii from 2.7 to 6.3 boat lengths. Sway velocities were less than twenty percent of mean forward speed with slip angles that were less than 20°. Thrust Loading Coefficients were compared to sway as a percent of forward speed. In small radius turns, no relationship was seen, while in larger radius turns, peaks of sway velocity corresponded with drops in thrust, but this was determined to be caused by reduced vehicle yaw in these intervals . Decoupling of thrust and yaw rate is recommended for future research.
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Date Issued
2013
PURL
http://purl.flvc.org/fau/fd/FA0004023
Subject Headings
Oceanographic instruments -- Evaluation, Propellers, Ship propulsion, Ships -- Hydrodynamics, Stability of ships
Format
Document (PDF)