Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Study of the Resistance Test and Wall Blockage Correction Method for the Submerged Body in LCT

대형 캐비테이션터널에서 몰수체 저항시험 및 위벽효과 수정 기법 연구

  • Ahn, Jong-Woo (Korea Research Institute of Ships & Ocean Engineering) ;
  • Seol, Han-Shin (Korea Research Institute of Ships & Ocean Engineering) ;
  • Park, Young-Ha (Korea Research Institute of Ships & Ocean Engineering) ;
  • Kim, Ki-Sup (Korea Research Institute of Ships & Ocean Engineering)
  • 안종우 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 설한신 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 박영하 (한국해양과학기술원 부설 선박해양플랜트연구소) ;
  • 김기섭 (한국해양과학기술원 부설 선박해양플랜트연구소)
  • Received : 2019.11.13
  • Accepted : 2020.03.23
  • Published : 2020.06.20
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Abstract

In order to study the resistance test technique for the submerged body in Large Cavitation Tunnel (LCT), DARPA Suboff, submarine model publicly available was manufactured. DTRC released the resistance test data of DARPA Suboff conducted at ship speeds up to 18.0 knots in high-speed towing tank in 1990. As LCT is considered restricted waterways with walls, the resistance test results must be corrected with three wall blockage effects called buoyancy effect, solid blockage effect and wake blockage effect. Before correction, the resistance of LCT was 16~20 % higher than that of DTRC. After correction, the resistance and the resistance coefficients were compared with those of DTRC. The corrected resistance of LCT shows good agreement with that of DTRC. The residual resistance coefficient shows the difference according to the calculation method of buoyancy and frictional resistance coefficient. This paper suggests the best way for the calculation of residual resistance coefficient, On the basis of the present study, it is thought that the operating conditions for the propeller cavitation and noise tests can be drawn through LCT tests.

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References

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