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Book A Theoretical Procedure for Calculating Propeller induced Hull Forces

Download or read book A Theoretical Procedure for Calculating Propeller induced Hull Forces written by Stavros Tsakonas and published by . This book was released on 1980 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method based on rational mechanics is presented for predicting hydrodynamic forces and moments on a hull of arbitrary geometry as a reaction to the propeller-induced velocity field. This method assumes that the hull surface can be represented by a distribution of sources. The numerical procedure is adapted to the CDC 7600 or Cyber 176 digital computer which furnishes the strength of the source distribution over the hull and the vertical component of the propeller-induced hull force at blade frequency. The program is executed for two widely different cases for which experimental measurements are available: a spheroidal head in the presence of a 3-bladed propeller operating in uniform inflow, and a Series 60 hull model (V-form stern) driven by a 4-bladed propeller. Theoretical predictions show agreement with corresponding experimental measurements within 11% for the body of revolution and 27% for the surface ship. A new method has lately been devised which replaces the sources by a distribution of doublets, thus replacing the three components of normal velocity by the negative of the velocity potential which has no directivity. Preliminary results show a substantial reduction in computing time and improvement in the accuracy of the results as well. The calculated theoretical predictions for the quadrilateral distribution now show an agreement with the measurements within 2% for the body of revolution and 10% for the surface ship.

Book NBS Special Publication

Download or read book NBS Special Publication written by and published by . This book was released on 1980 with total page 964 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Hydrodynamics of Ship Propellers

Download or read book Hydrodynamics of Ship Propellers written by John P. Breslin and published by Cambridge University Press. This book was released on 1994 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technical introduction to ship propeller hydrodynamics, for researchers in ocean technology, naval architecture, mechanical engineering.

Book Hydraulic Research in the United States and Canada 1978

Download or read book Hydraulic Research in the United States and Canada 1978 written by Pauline H. Gurewitz and published by . This book was released on 1980 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Hydraulic Research in the United States and Canada

Download or read book Hydraulic Research in the United States and Canada written by United States. National Bureau of Standards and published by . This book was released on 1978 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Technical Abstract Bulletin

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book A Method for Predicting Thrust Deduction Using Propeller Lifting Surface Theory

Download or read book A Method for Predicting Thrust Deduction Using Propeller Lifting Surface Theory written by Bruce D. Cox and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical method is presented for predicting the added resistance (thrust deduction) arising from propeller-hull interaction. The theory is formulated in terms of the potential flow about the hull and appendages which are represented by surface singularity distributions. The influence of the propeller is derived from lifting-surface theory including the effects of blade number, thickness, skew, rake, and radial and chordwise load distribution. In order to determine the interaction force, propeller-induced velocities and the modified hull pressure distribution are computed with appropriate corrections to the hull singularities. The axial force is then derived by integration of the pressure on the hull and also by application of the steady-flow Lagally theorem.

Book Marine Propellers and Propulsion

Download or read book Marine Propellers and Propulsion written by John Carlton and published by Butterworth-Heinemann. This book was released on 2012-10-30 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: The early development of the screw propeller. Propeller geometry. The propeller environment. The ship wake field, propeller performance characteristics.

Book Fourteenth Symposium Naval Hydrodynamics

Download or read book Fourteenth Symposium Naval Hydrodynamics written by and published by . This book was released on 1982 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Propeller Induced Ship Hull Vibration

Download or read book Propeller Induced Ship Hull Vibration written by C. A. Carlsen and published by . This book was released on 1979 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: