A numerical method for predicting wash waves of SES

J.X. Nan Xie, A. Jasionowski, D. Vassalos

Research output: Contribution to journalArticle

Abstract

A numerical method is presented for predicting wash waves of Surface Effect Ships (SES)at deep waters.The wash waves of the SES are represented by the wave-making of a moving rectangular pressure distribution over the air cushion. Basing on the linear potential theory, the wash waves can be analytically expressed as integrals whose integrands oscillate with high frequency.The numerical procedure involves transformation of the integral variables,such that the integrands are monotonic for different vessel speed,shape of the pressure patch and locations of the wave to be calculated,and easy to facilitate the numerical calculation.The singularities of the integral can be also removed. Numerical results show that the present method is of high computational efficiency and with good agreement with the published results. Some results of wash waves of SES are presented and discussed.The characters of local and non-local effect parts of the wash wave of SES are discussed. Attempt is also tried to apply the present method in predicting wash wave of conversional catamaran,the comparison between the prediction and the model test measurement shows fairly good agreement.
LanguageEnglish
Pages31-44
Number of pages14
JournalJournal of Ship Mechanics
Volume8
Issue number6
Publication statusPublished - 2004

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Numerical methods
Ships
Computational efficiency
Pressure distribution
Air
Water

Keywords

  • wash waves
  • naval engineering
  • pressure distribution

Cite this

Xie, J.X. Nan ; Jasionowski, A. ; Vassalos, D. / A numerical method for predicting wash waves of SES. In: Journal of Ship Mechanics. 2004 ; Vol. 8, No. 6. pp. 31-44.
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Xie, JXN, Jasionowski, A & Vassalos, D 2004, 'A numerical method for predicting wash waves of SES' Journal of Ship Mechanics, vol. 8, no. 6, pp. 31-44.

A numerical method for predicting wash waves of SES. / Xie, J.X. Nan; Jasionowski, A.; Vassalos, D.

In: Journal of Ship Mechanics, Vol. 8, No. 6, 2004, p. 31-44.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A numerical method for predicting wash waves of SES

AU - Xie, J.X. Nan

AU - Jasionowski, A.

AU - Vassalos, D.

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N2 - A numerical method is presented for predicting wash waves of Surface Effect Ships (SES)at deep waters.The wash waves of the SES are represented by the wave-making of a moving rectangular pressure distribution over the air cushion. Basing on the linear potential theory, the wash waves can be analytically expressed as integrals whose integrands oscillate with high frequency.The numerical procedure involves transformation of the integral variables,such that the integrands are monotonic for different vessel speed,shape of the pressure patch and locations of the wave to be calculated,and easy to facilitate the numerical calculation.The singularities of the integral can be also removed. Numerical results show that the present method is of high computational efficiency and with good agreement with the published results. Some results of wash waves of SES are presented and discussed.The characters of local and non-local effect parts of the wash wave of SES are discussed. Attempt is also tried to apply the present method in predicting wash wave of conversional catamaran,the comparison between the prediction and the model test measurement shows fairly good agreement.

AB - A numerical method is presented for predicting wash waves of Surface Effect Ships (SES)at deep waters.The wash waves of the SES are represented by the wave-making of a moving rectangular pressure distribution over the air cushion. Basing on the linear potential theory, the wash waves can be analytically expressed as integrals whose integrands oscillate with high frequency.The numerical procedure involves transformation of the integral variables,such that the integrands are monotonic for different vessel speed,shape of the pressure patch and locations of the wave to be calculated,and easy to facilitate the numerical calculation.The singularities of the integral can be also removed. Numerical results show that the present method is of high computational efficiency and with good agreement with the published results. Some results of wash waves of SES are presented and discussed.The characters of local and non-local effect parts of the wash wave of SES are discussed. Attempt is also tried to apply the present method in predicting wash wave of conversional catamaran,the comparison between the prediction and the model test measurement shows fairly good agreement.

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