Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method

Jussi Martio; Antonio Sánchez-Caja; Timo Siikonen

Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method

Jussi Martio, Antonio Sánchez-Caja, Timo Siikonen

Aalto University

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

The virtual mass and damping coefficients of a rotating propeller are determined using URANS computations. Time-accurate simulations are carried out for an open propeller forced to harmonic motion in two separate directions, translational x₁- and rotational x₄-directions. The analysis produces the diagonal coefficients for the virtual mass m₁₁, m₄₄ together with the diagonal damping terms c₁₁, c₄₄. The cross-terms m₁₄, m₄₁ and c₁₄, c₄₁ are also evaluated. A range of advance numbers is considered in the simulations. Several excitation frequencies and amplitudes are applied in order to determine the impact of viscosity on the vibrational coefficients. The computed cases are
compared to published semi-empirical results. The average magnitudes of the semi-empirical coefficient correspond quite reasonably to those computed by the CFD method. The viscous effects are found to have a certain impact in
some coefficients.

Original language	English
Title of host publication	Proceedings of the Fourth International Symposium on Marine Propulsors - smp15
Editors	Spyros A. Kinnas
Place of Publication	Austin
Publisher	smp International Symposium on Marine Propulsors
Pages	228-240
ISBN (Print)	978-0-9964594-4-0
Publication status	Published - 2015
MoE publication type	A4 Article in a conference publication
Event	4th International Symposium on Marine Propulsors, smp 15 - Austin, United States Duration: 31 May 2015 → 4 Jun 2015 Conference number: 4

Publication series

Series	International Symposiums on Marine Propulsors
Volume	15
ISSN	2414-6129

Conference

Conference	4th International Symposium on Marine Propulsors, smp 15
Abbreviated title	smp 15
Country/Territory	United States
City	Austin
Period	31/05/15 → 4/06/15

Keywords

URANS
added mass
propeller
CFD
damping coefficients
vibration

Access to Document

http://www.marinepropulsors.com/proceedings/2015/MB4-2.pdf

Cite this

Martio, J., Sánchez-Caja, A., & Siikonen, T. (2015). Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method. In S. A. Kinnas (Ed.), Proceedings of the Fourth International Symposium on Marine Propulsors - smp15 (pp. 228-240). Article MB4.2 smp International Symposium on Marine Propulsors. http://www.marinepropulsors.com/proceedings/2015/MB4-2.pdf

Martio, Jussi ; Sánchez-Caja, Antonio ; Siikonen, Timo. / Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method. Proceedings of the Fourth International Symposium on Marine Propulsors - smp15. editor / Spyros A. Kinnas. Austin : smp International Symposium on Marine Propulsors, 2015. pp. 228-240 (International Symposiums on Marine Propulsors, Vol. 15).

@inproceedings{e6f59015a01b4692805c95593c94e785,

title = "Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method",

abstract = "The virtual mass and damping coefficients of a rotating propeller are determined using URANS computations. Time-accurate simulations are carried out for an open propeller forced to harmonic motion in two separate directions, translational x1- and rotational x4-directions. The analysis produces the diagonal coefficients for the virtual mass m11, m44 together with the diagonal damping terms c11, c44. The cross-terms m14, m41 and c14, c41 are also evaluated. A range of advance numbers is considered in the simulations. Several excitation frequencies and amplitudes are applied in order to determine the impact of viscosity on the vibrational coefficients. The computed cases arecompared to published semi-empirical results. The average magnitudes of the semi-empirical coefficient correspond quite reasonably to those computed by the CFD method. The viscous effects are found to have a certain impact insome coefficients. ",

keywords = "URANS, added mass, propeller, CFD, damping coefficients, vibration",

author = "Jussi Martio and Antonio S{\'a}nchez-Caja and Timo Siikonen",

year = "2015",

language = "English",

isbn = "978-0-9964594-4-0",

series = "International Symposiums on Marine Propulsors",

publisher = "smp International Symposium on Marine Propulsors",

pages = "228--240",

editor = "Kinnas, {Spyros A.}",

booktitle = "Proceedings of the Fourth International Symposium on Marine Propulsors - smp15",

address = "Norway",

note = "4th International Symposium on Marine Propulsors, smp 15, smp 15 ; Conference date: 31-05-2015 Through 04-06-2015",

}

Martio, J , Sánchez-Caja, A & Siikonen, T 2015, Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method. in SA Kinnas (ed.), Proceedings of the Fourth International Symposium on Marine Propulsors - smp15., MB4.2, smp International Symposium on Marine Propulsors, Austin, International Symposiums on Marine Propulsors, vol. 15, pp. 228-240, 4th International Symposium on Marine Propulsors, smp 15, Austin, Texas, United States, 31/05/15. <http://www.marinepropulsors.com/proceedings/2015/MB4-2.pdf>

Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method. / Martio, Jussi ; Sánchez-Caja, Antonio; Siikonen, Timo.
Proceedings of the Fourth International Symposium on Marine Propulsors - smp15. ed. / Spyros A. Kinnas. Austin: smp International Symposium on Marine Propulsors, 2015. p. 228-240 MB4.2 (International Symposiums on Marine Propulsors, Vol. 15).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method

AU - Martio, Jussi

AU - Sánchez-Caja, Antonio

AU - Siikonen, Timo

N1 - Conference code: 4

PY - 2015

Y1 - 2015

N2 - The virtual mass and damping coefficients of a rotating propeller are determined using URANS computations. Time-accurate simulations are carried out for an open propeller forced to harmonic motion in two separate directions, translational x1- and rotational x4-directions. The analysis produces the diagonal coefficients for the virtual mass m11, m44 together with the diagonal damping terms c11, c44. The cross-terms m14, m41 and c14, c41 are also evaluated. A range of advance numbers is considered in the simulations. Several excitation frequencies and amplitudes are applied in order to determine the impact of viscosity on the vibrational coefficients. The computed cases arecompared to published semi-empirical results. The average magnitudes of the semi-empirical coefficient correspond quite reasonably to those computed by the CFD method. The viscous effects are found to have a certain impact insome coefficients.

AB - The virtual mass and damping coefficients of a rotating propeller are determined using URANS computations. Time-accurate simulations are carried out for an open propeller forced to harmonic motion in two separate directions, translational x1- and rotational x4-directions. The analysis produces the diagonal coefficients for the virtual mass m11, m44 together with the diagonal damping terms c11, c44. The cross-terms m14, m41 and c14, c41 are also evaluated. A range of advance numbers is considered in the simulations. Several excitation frequencies and amplitudes are applied in order to determine the impact of viscosity on the vibrational coefficients. The computed cases arecompared to published semi-empirical results. The average magnitudes of the semi-empirical coefficient correspond quite reasonably to those computed by the CFD method. The viscous effects are found to have a certain impact insome coefficients.

KW - URANS

KW - added mass

KW - propeller

KW - CFD

KW - damping coefficients

KW - vibration

M3 - Conference article in proceedings

SN - 978-0-9964594-4-0

T3 - International Symposiums on Marine Propulsors

SP - 228

EP - 240

BT - Proceedings of the Fourth International Symposium on Marine Propulsors - smp15

A2 - Kinnas, Spyros A.

PB - smp International Symposium on Marine Propulsors

CY - Austin

T2 - 4th International Symposium on Marine Propulsors, smp 15

Y2 - 31 May 2015 through 4 June 2015

ER -

Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS-Method

Abstract

Publication series

Conference

Keywords

Access to Document

Fingerprint

Cite this