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العنوان
Development of an Efficient CFD-Based Calculation Procedure for the Evaluation of the Performance of Marine Propellers \
المؤلف
Fathalla, Mohamed Fathi Fouad.
هيئة الاعداد
باحث / محمد فتحى فؤاد
مشرف / محمد عباس قطب
kotb2000@yahoo.com
مشرف / مصطفى عبد المقصود
مشرف / تامر محمود حامد
مناقش / عادل عبد الحليم بنوان
abanawan@yahoo.com
مناقش / عمرو على حسن
الموضوع
Marine Engineering.
تاريخ النشر
2022.
عدد الصفحات
97 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة (متفرقات)
تاريخ الإجازة
18/12/2022
مكان الإجازة
جامعة الاسكندريه - كلية الهندسة - هندسة بحرة وعمارة السفن
الفهرس
Only 14 pages are availabe for public view

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Abstract

One of the biggest challenges is to determine and evaluate the performance characteristics of marine propellers through open-water experiments. A useful alternative approach could be numerical predictions using simulations of computational fluid dynamics (CFD). Most of the previous studies used traditional turbulence models that were only suitable for fully turbulent flows. These models mostly lead to high discrepancies between numerical methods and experimental measurements, especially at low Reynolds numbers where the flow transition effects may have an impact on the calculation of the propeller’s performance. These discrepancies could be controlled by implication of the transition models such as 𝛾−𝑅𝑒 ̃𝜃𝑡 transition model. These numerical models provide a precise evaluation of the performance characteristics and understanding of the laminar to turbulent transition flow physics. The aim of this study is to improve propeller performance prediction at the model scale using the 𝑘−𝜔 SST turbulence model and 𝛾−𝑅𝑒 ̃𝜃𝑡 transition model as compared with experimental results. Results from the transition are presented, along with an explanation of the influence of the inlet turbulence quantities on the findings. With the transition model, the constrained streamlines reflect an improvement in the flow pattern. The results also show a good prediction of the propeller global coefficients when using the transition model.