Description of Wake Survey Rake Calibration Technique and Calibration Results of Rake 4.
Abstract
The David Taylor Naval Ship R&D Center conducts wake surveys on models of surface ships and submarines on the towing carriages. The device used to measure the velocity field in way of the propeller disc of the model is called a pitot tube rake and is made up of several five-hole pitot tubes. The rake must be calibrated in open water before a wake survey experiment. This report describes the complete rake calibration process including the apparatus, technique and computations and can be used as a reference for any future rake calibrations. The apparatus includes the rake calibration rig, the pressure transducers, the instrumentation, and the mini-computer used to collect the data. The experimental technique to calibrate rakes includes the alignment of the rake, the pressure gage procedures, and the data collection procedure. The computational procedures used to obtain the results from rake calibrations are found in the two appendixes. This report also gives a description of Rake 4 and the results of the Rake 4 calibration. Rake 4 was built primarily for the wake survey experiment on the model for the ARS-50.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1985
- Accession Number
- ADA153762
Entities
People
- D. R. Mullinix
- David W Taylor