8673

8054

كارشناسي ارشد

تبديل انرژي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1392

نه،97ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

احمد صداقت، مهدي مقيمي زند

19/1/93

محمود اشرفي زاده، محمدرضا توكلي

مهندسي مكانيك

ID8054

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiA Sedaghat Assist Prof sedaghat@cc iut ac irM Moghimi Zand Assist Prof mahdimoghimi@ut ac irAbstractNatural structure can be the basis of new technology development Underwater floatingdesign inspired by nature always has attracted many marine engineers for different reasonssuch as search in the ocean to discover new sources of minerals The main purpose of this paper is geometrical design of underwater objects and modelsimulations by the Fluent in 3D mode Inspired by the shape of dolphin the geometry ofunderwater floating is generated by the Catia program The reason of using forms ofdolphin s body its unique features To analyze the model in the mode of the moving tail themethod of dynamic mesh is used The floating has been investigated for a fully submergedcondition in which the effect of free surface is neglected According to the Hydrodynamicof dolphin body proper geometry was designed under the deformations of the tail and thebody Four types of designed tails and bodies have been studied and compared In thisresearch turbulence models of k RNG k Standar k are considered The resultsindicated that the drag force values rose with an increase in floating speed form 1 to 3 m sand decreased with changing the form of floating body Numerical analysis of the geometry and debate about the implementation of theexperimental model will find the fourth model is more appropriate Because this model isless tolerance of drag force Continue with inspiration from a dolphin s tail in the water toexamine the dynamic mesh model in two dimensional mode to create the move action Wenotice with dynamic mesh when floating in a tail mode drag force is reduced Should consider the fact that we are facing a lot of problems for a movement similar to adolphin swim In the present work the dolphin s body is considered rigid Animated tailmode has also been studied In order to verify the simulation model the model is compared with an experimentalmodel Hydrodynamic parameters obtained are compared with the simulation resultsindicate that compliance is relatively good results Hence simulated model can be used tooptimize and verify the required parameters This would reduce the cost of testing andcheking the errors of examinations Keywords Under Water Floating Bio Inspired Geometrical Design Turbulence Model Dynamic Mesh Drag Force دانشگاه صنعتي اصفهان دانشكده مهندسي مكان ك 101

احمد صداقت، مهدي مقيمي زند

محمود اشرفي زاده، محمدرضا توكلي