Open AccessObtaining mathematical functions of the propeller thrust and torque coefficients fluctuations at non-uniform wake flow including geometry effects
Author(s) -
Kumars Mahmoodi,
Hassan Ghassemi,
Hashem Nowruzi
Publication year - 2018
Publication title -
mechanics and industry
Language(s) - English
Resource type - Journals
eISSN - 2257-7777
pISSN - 2257-7750
DOI - 10.1051/meca/2018017
Subject(s) - thrust , propeller , torque , wake , fourier series , advance ratio , inflow , flow (mathematics) , mechanics , physics , mathematics , geometry , blade pitch , engineering , mathematical analysis , marine engineering , thermodynamics , turbine
The main purpose of this paper is to obtain mathematical functions of the propeller thrust and torque coefficients fluctuations at non-uniform flow. Two types of inflow wakes from Seiun-Maru ship and INSEAN 7000 DWT Tanker are investigated for the B-series propeller. The computed results include the thrust and torque coefficients fluctuations and their mathematical functions under the influence of two different wakes for one blade and all blades of the studied propellers. To this accomplishment, variation of thrusts and torques coefficients under different pitch ratio, expanded area ratio and number of blades are investigated using classical mathematical methods in one cycle and the Fourier coefficients with ten terms are presented for each case. The results of thrust and torque coefficients at different propeller geometries are presented and discussed.