<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Added mass is an important and effective dynamic coefficient in accelerating, non uniform motion as a result of fluid accelerating around a body. It plays an important role, especially in vessel roll motion, control parameters as well as in analyzing the local and global vibration of a vessel and its parts like propellers and rudders. In this article, calculating the Added Mass Coefficient has been examined for a sphere, ellipsoid, marine propeller and hydrofoil; using numerical Boundary Element Method. Since an Ellipsoid and a sphere have simple geometric shapes and the Analytical values of their added mass coefficients are available, so that the results of added mass matrix are obtained and evaluated, using the boundary element method. Then the added mass matrix is computed in a given geometrical and flow specifications for a specific propeller and its results are studied versus experimental results, which it's current numerical data In comparison with other numerical methods has a good conformity with experimental results. The most important advantage of the method in determining the added mass matrix coefficients for the surface and underwater vessels and the marine propellers is extracting all the added mass coefficients with very good Accuracy, while in other numerical methods it is impossible to extract all the coefficients with the Desired Accuracy.</p></abstract>

Added mass is an important and effective dynamic coefficient in accelerating, non uniform motion as a result of fluid accelerating around a body. It plays an important role, especially in vessel roll motion, control parameters as well as in analyzing the local and global vibration of a vessel and its parts like propellers and rudders. In this article, calculating the Added Mass Coefficient has been examined for a sphere, ellipsoid, marine propeller and hydrofoil; using numerical Boundary Element Method. Since an Ellipsoid and a sphere have simple geometric shapes and the Analytical values of their added mass coefficients are available, so that the results of added mass matrix are obtained and evaluated, using the boundary element method. Then the added mass matrix is computed in a given geometrical and flow specifications for a specific propeller and its results are studied versus experimental results, which it's current numerical data In comparison with other numerical methods has a good conformity with experimental results. The most important advantage of the method in determining the added mass matrix coefficients for the surface and underwater vessels and the marine propellers is extracting all the added mass coefficients with very good Accuracy, while in other numerical methods it is impossible to extract all the coefficients with the Desired Accuracy.

The Added Mass Coefficient computation of sphere, ellipsoid and marine propellers using Boundary Element Method

Polish Maritime Research

Added mass is an important and effective dynamic coefficient in accelerating, non uniform motion as a result of fluid accelerating around a body. It plays an...

The Added Mass Coefficient computation of sphere, ellipsoid and marine propellers using Boundary Element Method

Publié en ligne: 21 avr. 2011

Pages: 17 - 26

DOI: https://doi.org/10.2478/v10012-011-0003-1

Mots clés
Added mass coefficient, Boundary element method, Marine propeller, Ellipsoid

This content is open access.

The Added Mass Coefficient computation of sphere, ellipsoid and marine propellers using Boundary Element Method

Publié en ligne: 21 avr. 2011

Pages: 17 - 26

DOI: https://doi.org/10.2478/v10012-011-0003-1

Mots clésAdded mass coefficient, Boundary element method, Marine propeller, Ellipsoid

This content is open access.

Mots clés
Added mass coefficient, Boundary element method, Marine propeller, Ellipsoid