EVALUATING THE AERO-HYDRODYNAMIC PERFORMANCE OF THE MARK 1 PROPULSION SYSTEM FOR THE DREA STATIC TEST RIG

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Authors
  1. Sjolander, S.A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Carleton Univ, Ottawa ONT (CAN) Dept of Mechanical and Aerospace Engineering
Abstract
The report describes a number of different analyses carried out over a period of several years in connection with the propulsion system for the DREA Static Test Rig, a submrine hydrodynamic test facility developed for use in the Institute for Aerospace Research (IAR) 9 x 9 m wind tunnel. Drive power requirements are estimated for both the current Mark I propeller and a possible Mark II version. A preliminary assessment is made of the effects of compressibility on propeller thrust and torque measurements. The question of compressibility corrections was subsequently investigated in more detail and is the project of a separate report. Finally, an assessment is made of the measurements obtained with the Mark I propeller. It is concluded that for measurements made with the current propulsion system the following uncertainties apply: thrust coefficients + or - 0.02; off axis force coefficients, + or - 0.01; and moment coefficients, + or - 0.002. These uncertainties are largely the result of an unexplained systematic error in the propeller loading measurements at one wind speed. The uncertainies could be substantially reduced if this error were eliminated. For this propeller the compressibility corrections are smaller than the uncertainties quoted above and therefore such corrections are not meaningful.
Keywords
MARK 1 propulsion system;DREA static test rig
Report Number
DREA-CR-93-454 — Contractor Report
Date of publication
01 Sep 1993
Number of Pages
104
DSTKIM No
95-03155
CANDIS No
152126
Format(s):
Document Image stored on Optical Disk;Hardcopy

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