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Estimation of real ship propelling performance by the surface velocity lattice method using model ship flow field data; Mokeisen ryujo data wo mochiita hyomen uzu koshiho ni yoru jissen suishin seino no suitei

Abstract

This is basically a technique wherein the wing element method is replaced by a surface vortex lattice method. A horseshoe vortex of unknown intensity and source surface of known intensity are distributed on the wing surface and, under conditions that the fluid will not cross the boundary, the intensity of horseshoe vortex circulation is calculated for the solution of the fluid field. For the simulation of a real ship in navigation, the required propeller revolution thrust is determined using the real ship resistance value and real ship thrust reduction factor estimated from a model ship resistance test by extrapolation. The calculation of propeller performance is conducted in the quasi-steady condition using the force of fluid working on one wing for each wing angle (with the wing rotated at the increment of 6 degrees), and the thrust and torque are determined using the averages of values obtained in one cycle. It is found that the torque value is overestimated in a considerable degree in the wing element theory. In the surface vortex lattice method, both thrust and torque values agree with experimental values mostly, and this method is found to be accurate enough as a navigation element calculation tool when many  More>>
Authors:
Kai, H; Ikehata, M; Sakai, S [1] 
  1. Yokohama National University, Yokohama (Japan). Faculty of Engineering
Publication Date:
Oct 01, 1997
Product Type:
Miscellaneous
Report Number:
ETDE/JP-98750999; CONF-9711147-
Reference Number:
SCA: 320204; 420400; 423000; 990200; PA: JP-97:0G4488; EDB-98:073749; SN: 98001944424
Resource Relation:
Conference: 95. meeting of the West Japan Society of Naval Architects, Seibu zosenkai dai 95 kai reikai ronbun kogai, Osaka (Japan), 14-15 Nov 1997; Other Information: PBD: 1 Oct 1997; Related Information: Is Part Of Summary of the papers of the 95th Meeting of the West Japan Society of Naval Architects. Joint meeting of three shipbuilding societies in fall, fiscal 1997; PB: 168 p.; Seibu Zosenkai dai 95 kai reikai ronbun gaiko. 1997 nendo shuki zosen sangakkai rengo koenkai
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 99 MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS; SHIPS; FUNCTIONAL MODELS; PROPULSION; PERFORMANCE; FLUID FLOW; HYDRODYNAMICS; EXPERIMENTAL DATA; VORTICES; NUMERICAL SOLUTION; JETS; BOUNDARY CONDITIONS; DRAG; PROPULSION SYSTEMS; TORQUE
OSTI ID:
622776
Research Organizations:
West Japan Society of Naval Architects, Fukuoka (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE98750999; TRN: JN97G4488
Availability:
Available from West Japan Society of Naval Architects, 10-1, Hakozaki 6-chome, Higashi-ku, Fukuoka-shi, Fukuoka, (Japan); OSTI as DE98750999
Submitting Site:
NEDO
Size:
pp. 1-6
Announcement Date:

Citation Formats

Kai, H, Ikehata, M, and Sakai, S. Estimation of real ship propelling performance by the surface velocity lattice method using model ship flow field data; Mokeisen ryujo data wo mochiita hyomen uzu koshiho ni yoru jissen suishin seino no suitei. Japan: N. p., 1997. Web.
Kai, H, Ikehata, M, & Sakai, S. Estimation of real ship propelling performance by the surface velocity lattice method using model ship flow field data; Mokeisen ryujo data wo mochiita hyomen uzu koshiho ni yoru jissen suishin seino no suitei. Japan.
Kai, H, Ikehata, M, and Sakai, S. 1997. "Estimation of real ship propelling performance by the surface velocity lattice method using model ship flow field data; Mokeisen ryujo data wo mochiita hyomen uzu koshiho ni yoru jissen suishin seino no suitei." Japan.
@misc{etde_622776,
title = {Estimation of real ship propelling performance by the surface velocity lattice method using model ship flow field data; Mokeisen ryujo data wo mochiita hyomen uzu koshiho ni yoru jissen suishin seino no suitei}
author = {Kai, H, Ikehata, M, and Sakai, S}
abstractNote = {This is basically a technique wherein the wing element method is replaced by a surface vortex lattice method. A horseshoe vortex of unknown intensity and source surface of known intensity are distributed on the wing surface and, under conditions that the fluid will not cross the boundary, the intensity of horseshoe vortex circulation is calculated for the solution of the fluid field. For the simulation of a real ship in navigation, the required propeller revolution thrust is determined using the real ship resistance value and real ship thrust reduction factor estimated from a model ship resistance test by extrapolation. The calculation of propeller performance is conducted in the quasi-steady condition using the force of fluid working on one wing for each wing angle (with the wing rotated at the increment of 6 degrees), and the thrust and torque are determined using the averages of values obtained in one cycle. It is found that the torque value is overestimated in a considerable degree in the wing element theory. In the surface vortex lattice method, both thrust and torque values agree with experimental values mostly, and this method is found to be accurate enough as a navigation element calculation tool when many panels are considered. 4 refs., 5 figs., 1 tab.}
place = {Japan}
year = {1997}
month = {Oct}
}