6010

5619

كارشناسي ارشد

مهندسي مكانيك

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1389

نه،85ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

احمدرضا پيشه ور، شهريار منصورزاده

23/3/90

ابراهيم شيراني، مهدي نيلي

مهندسي مكانيك

ID5619

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

A Numerical and Experimental Study on Hydrodynamic Coefficient and Flow around a Combat Surface Craft in Towing Tank of Subsea Science and Technology Research Institute Milad Ahmadi Malayeri m ahmadimalayeri@me iut ac ir January 30 2011 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi A R Pishevar Assoc Prof Supervisor apishe@cc iut ac ir S Mansourzadeh Assist Prof Supervisor shahriar@cc iut ac ir ABSTRACT In this research experimental results are provided for the resistance and wave profile tests around a bare hull of a surface craft called David Taylor Model Basin 5415 DTMB 5415 The experiments were carried out in the Subsea Science and Technology Research Center towing tank on a model with a new scale of 1 71 for Froude numbers between 0 05 0 45 The experimental results were also compared to the numerical results obtained from a free surface commercial code The model manufacturing procedure parameters measurement setting data acquisition and analysis of the experimental results followed the International Towing Tank Conference ITTC standards and technical committee reports Since the purpose of this study is to prepare databases for performing experiment with a new scale model the effects of the model scale on the results were studied and a suitable factor of 0 084 was found for the form factor The numerical analysis was accomplished by the CFX commercial code In this study turbulence was modeled using the k model and the volume fraction method was applied for the free surface approximation Second order accuracy schemes were also used to discretize the advection terms in the momentum equations To improve convergence volume continuity equation was solved implicitly Based on this analysis the total resistance the results of wave profile on the bare hull and the velocity contour were presented in the aforementioned range of Froude number Keywords Experimental Fluid Dynamics EFD Computational Fluid Dynamics CFD Resistance Test Wave Profile Test Form Factor Free Surface Flow Volume Fraction Method DTMB 5415

احمدرضا پيشه ور، شهريار منصورزاده

ابراهيم شيراني، مهدي نيلي