Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method | Zendy

J. Baltazar | Zendy; J. A. C. Falcão de Campos | Zendy; Johan Bosschers | Zendy

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Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method

Author(s) -

J. Baltazar,

J. A. C. Falcão de Campos,

Johan Bosschers

Publication year - 2012

Publication title -

international journal of rotating machinery

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.265

H-Index - 33

eISSN - 1026-7115

pISSN - 1023-621X

DOI - 10.1155/2012/474785

Subject(s) - wake , propulsor , duct (anatomy) , trailing edge , propeller , thrust , boundary layer , vortex , mechanics , torque , physics , acoustics , marine engineering , geology , aerospace engineering , engineering , medicine , pathology , thermodynamics

This paper discusses several modelling aspects that are important for the performance predictions of a ducted propulsor with a low-order Panel Method. The aspects discussed are the alignment of the wake geometry, the influence of the duct boundary layer on the wake pitch, and the influence of a transpiration velocity through the gap. The analysis is carried out for propeller Ka4-70 operating without and inside a modified duct 19A, in which the rounded trailing edge is replaced by a sharp trailing edge. Experimental data for the thrust and torque are used to validate the numerical results. The pitch of the tip vortex is found to have a strong influence on the propeller and duct loads. A good agreement with the measurements is achieved when the wake alignment is corrected for the presence of the duct boundary layer

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