Measurements of Propeller Inflow During Transient Turning of a Ship Model by Fiber Optic LDV

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Abstract:

A fiber optic Laser Doppler Velocimetry system was developed for the flow measurement around a ship model in the towing tank. The system was used to measure unsteady flow in front of an operating propeller in the turning condition of a ship model in order to grasp the characteristics of propeller inflow field during the transient turning motion. From the measured data, it is found that the propeller, inflow field changes complicatedly with heading angle of the ship model during the transient turning motion, and the axial velocity gradient in circumferential direction becomes steeper as a whole. The present measured data are considered to be useful to understand the characteristics of propeller inflow in the transient turning condition and to develop more precise prediction method of ship maneuvering motion and propeller vibratory forces.

Author(s):
Nagamatsu, Tetsuo ; Matsuo, Hiroshi
Author Organization(s):
MITSUBISHI HEAVY INDUSTRIES LTD NAGASAKI (JAPAN)
Supplementary Note:
This article is from 'International Symposium on Applications of Laser Techniques to Fluid Mechanics and Workshop on Computers in Flow Measurements (6th) Held in Lisbon, Portugal on July 20-23, 1992', ADA258510, p16.5.1-16.5.5.
Pagination:
0006

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
R/D
 Subject Terms
Joint Capability Areas:
JCA_4_Logistics
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*FIBER OPTICS, *BOUNDARY LAYER FLOW, JAPAN, FLOWMETERS, LASER VELOCIMETERS, MODEL BASINS, MARINE PROPELLERS, TURNING(MANEUVERING), DOPPLER EFFECT
Field(s)/Group(s):
Marine Engineering, Optical Detection and Detectors, Fluid Mechanics, Fiber Optics and Integrated Optics
Keyword(s):
COMPONENT REPORTS, FOREIGN REPORTS, LASER DOPPLER VELOCIMETRY, INFLOW
Report Date:
1992 Jul 23