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Naval Architecture & Ocean Engineering
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EN353: Resistance and Propulsion

Catalog Description

EN353: Resistance and Propulsion (3-2-4).

Topics include dimensional analysis, similitude, wave and viscous resistance of ships, ship-model testing techniques, full-scale performance prediction, momentum theory of propulsion devices and propeller vibrations and design. The course also covers the experimental aspects of marine vehicle resistance and propulsion.

Textbook

Principles of Naval Architecture, Vol. II, E. V. Lewis, Editor, SNAME, 1988

References

Class handouts and selected technical papers.

Goals

  1. Understand the sources of ship resistance.
  2. Be able to determine the required effective horsepower for a given ship.
  3. Be able to perform an EHP test on a small model.
  4. Understand the procedures for and the instrumentation used in an SHP test and an open water propeller test.
  5. Be familiar with modern ship propulsion systems.
  6. Be able to complete a propeller design using one of the methods presented

Prerequisites

EN247 Principles of Naval Architecture or EN245 Principles of Ocean Systems Engineering, NAOE Department

EM316 Applied Fluid Mechanics or EM324 Fluid Dynamics, Mechanical Engineering Department

Class Topics

  1. Basic Fluid Concepts
  2. Components of Ship Resistance
  3. Hull Form and Resistance
  4. Propeller Theories
  5. Hull-Propeller Interaction
  6. Cavitation
  7. Design of Propellers
  8. Other Propulsion Systems

Computer Usage

The students are required to make extensive use of the capabilities of their spreadsheet program for this course. The students are required to develop spreadsheets for performing resistance and propulsion calculations. The students are also encouraged to use their spreadsheet program in the design of a propeller so that they can perform some optimization of their design.

Laboratory Projects

  1. Model ballasting
  2. Resistance of a flat plate
  3. Boundary Layer Measurement
  4. Model Scaling Effects on Resistance Prediction
  5. Planing Hull Testing
  6. Submarine Testing
  7. Propeller Measurement
  8. Propeller Open water propeller efficiency
  9. SHP model testing
  10. Cavitation effects on propellers
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