پديد آورنده :
بهنيا، محسن
عنوان :
آناليز عملكرد توربين هاي سرمايشي سرعت بالا با استفاده از شبيه سازي عددي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
تبديل انرژي
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك
صفحه شمار :
ده،94ص.: مصور،جدول،نمودار
يادداشت :
ص.ع.به فارسي و انگليسي
استاد راهنما :
مهدي نيلي احمد آبادي، محسن ثقفيان
توصيفگر ها :
شبيه سازي عددي سه بعدي , توربين جريان شعاعي , فن گريز از مركز , منحني عملكرد
تاريخ نمايه سازي :
24/1/92
استاد داور :
محسن دوازده امامي، احمد سوهانكار اصفهاني
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
97 Performance Analysis of High Speed Cooling Turbines Using Numerical Simulation Mohsen Behnia m behnia@me iut ac ir Date of Submission 2013 01 19 Department of Mechanical Engineering Isfahan University of Technology Isfahan Iran Degree M Sc Language Farsi Supervisor Mehdi Nili Ahmadabadi m nili@cc iut ac ir Mohsen saghafian saghafian@cc iut ac irAbstract In this study the performance characteristic of a high speed cooling turbine is investigated usingnumerical simulation Cooling turbine is a radial flow reaction turbine with an induction generator mountedon the same shaft In this project the cooling turbine is the most important part of aircraft air conditioningsystem consisting of a radial flow turbine and a centrifugal fan The objective of this project is simulation offluid flow in the turbine and fan and also obtaining the cooling turbine performance curve This projectinvolves modeling of turbine and fan using the SolidWorks Catia and ANSYS CFX softwares At first theturbine and fan rotor geometries are modeled and then are transferred to Turbo Grid for grid generation Also the turbine and fan casing are transferred to CFXmesh for grid generation Finally the numericalsimulation of fluid flow through the turbine and fan is done using the CFX solver Boundary conditions forturbine and fan are defined at two steps At the first one boundary conditions are defined to obtain theperformance characteristic map of the turbine and fan under specific laboratory conditions The results showthe flow is chocked at the turbine rotor outlet Maximum efficiency of the turbine is equal to 62 atrotational speed of 27 000 rpm and mass flow rate of 0 174 kg s Also a high swirling flow at the turbinerotor outlet causes a high reverse flow at the diffuser outlet Moreover the results of fan show the fanpressure ratio in most cases is less than one and the maximum efficiency of the fan rotor is equal to 63 atrotational speed of 50 000 rpm and mass flow rate of 0 3 kg s At all cases the flow separation occurs on thesuction surface Also flow distortion incidence and mixing phenomenon occur inside the fan casing At thesecond part of this project boundary conditions are defined according to the required conditions for theindustry The turbine exit temperature as the air conditioning temperature is the most important parameter forthe industry The results show that exit temperature and total to static isentropic efficiency decreases withincreasing inlet pressure while mass flow rate and output power increases Also the minimum outlettemperature of the turbine occurs at rotational speed of 62 400 rpm Finally the fan rotor isentropicefficiency pressure ratio and power consumption increase with increasing mass flow rate and decreasinginlet temperature Keywords 3D numerical simulation radial flow turbine centrifugal fan performance map
استاد راهنما :
مهدي نيلي احمد آبادي، محسن ثقفيان
استاد داور :
محسن دوازده امامي، احمد سوهانكار اصفهاني
