Development of an efficient CFD-based procedure with transitionsensitive turbulence model for evaluating the performance of marine propellers

In this paper, a CFD-based procedure for the evaluation of the performance characteristics of the well-known PPTC propeller, at model scale, is presented in detail. Results are obtained using one of the Local Correlation based Transition Models (LCTM), namely, the 𝛾 −𝑅𝑒̃ 𝜃𝑡 transition model in combination with the 𝑘 − 𝜔 SST turbulence model in a RANS-based numerical procedure to predict transition over the blade surface. The aim of using the 𝛾 − 𝑅𝑒̃ 𝜃𝑡 transition model is to predict the onset of transition and its influence on the propeller’s overall performance and on the flow behavior. Another aim of the work is to investigate the influence of the laminar-turbulent transition on the propeller’s flow. With the transition model, the constrained streamlines reflect an improvement in the flow pattern as compared to that of the model used for fully turbulent flow. Results also show an accurate prediction of the propeller’s global coefficients when the transition model is applied. Finally, a comparison between the results of the different transition models is conducted showing privilege of the 𝛾 −𝑅𝑒̃ 𝜃𝑡 over other transition models in terms of predicting the overall performance of the propeller.

Subjects

CFD

PPTC Propeller

Transition-sensitive turbulence model

DDC Class

620: Engineering

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publishedVersion

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http://rightsstatements.org/vocab/InC/1.0/

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Fouad-DevelopmentOfAnEfficientCfdbasedProcedureWithTransitionsensitive-1116-1-final.pdf

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Main Article

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1.15 MB

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Development of an efficient CFD-based procedure with transitionsensitive turbulence model for evaluating the performance of marine propellers