5524

5184

كارشناسي ارشد

تبديل انرژي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1389

هشت،108ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

احمد صابونچي

محمدرضا سليم پور

19/8/89

علي اكبر عالم رجبي، احمد صداقت

مهندسي مكانيك

ID5184

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

9 Simulation of heat transfer in the furnace 101 of Isfahan refinery Amin khodabandeh a khodabandeh@me iut ac ir 12th June 2010 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree Master of Science Language Persian Supervisor Ahmad Saboonchi ahmadsab@cc iut ac ir Abstract Because of restriction of fossil fuel reservoirs and increasing it s price energy saving has become very important in all of the world Today different industries effort for energy saving Swirling flows are widely used in industrial burners employed for example in power station furnaces and gas turbine combustors to provide stable and high intensity flames Over the last two decades significant progress has been made in the development of computational fluid dynamics CFD based models to simulate the performance of practical combustion systems In this computational study three turbulent models and two radiation models has been assessed in predicting a turbulent non premixed combusting swirling flow of the type frequently found in practical combustion systems The predictions are compared against the experimental data of mean axial and tangential velocities gas temperatures and oxygen concentration collected in a 400 kW semi industrial scale combustor fired with coke oven gas using an industry type swirl burner and a combustion flow with bluff body burner CFD studies using Fluent code were carried out for three cases Standard k Model renormalization group k Model RNG and Reynolds Stress Model RSM The model results from these three cases are compared with each other and with the experimental results Three turbulent models coupled with PDF mixture fraction combustion model were applied and the predicted results were compared Radiation heat transfer was modeled by the discrete ordinates model DO and p1 The numerical simulation has been performed with a triangular and unstructured mesh composed of 40 000 cells and the method for this study is axisymmetric swirl The absorption coefficient of the gas mixture is calculated by the means of a Weighted Sum of Gray Gas model WSGGM The algorithms PRESTO and SIMPLE have been used for pressure interpolation and coupling of pressure and velocity respectively The overall agreement between the measurements and the predictions obtained with both the k and Reynolds stress turbulence models are reasonably good The levels of gas temperature and oxygen concentration in the internal recirculation zone and the enveloping shear region are on the whole better predicted by the Reynolds stress model

احمد صابونچي

محمدرضا سليم پور

علي اكبر عالم رجبي، احمد صداقت