4948

4650

كارشناسي ارشد

تبديل انرژي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1388

هفده، 116ص: مصور، جدول، نمودار

ص.ع به: فارسي و انگليسي

احمد صابونچي

احمد رضا عظيميان

28/10/88

محسن دوازده امامي، محمد رضا سليم پور

1396/09/25

كتابنامه

مهندسي مكانيك

ID4650

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

Study of the Application of Regenerative Burners to Steel Reheat Furnaces Sharif Momen Beitollahi beitollahi@me iut ac ir 17 05 2009 Department of Mechanical Engineering Isfahan University of Technology Isfahan 84156 83111 IranDegree M Sc Language FarsiDr Ahmad Saboonchi ahmadsab@cc iut ac irAbstractRegenerative furnaces which are widely used in industry are among the most modern furnaces These furnacesuse burners with a thermal efficiency higher than the conventional ones Aluminum glass ceramic and steelindustries can use this technology and greatly reduce their fuel consumption In this project the functioning ofthese burners is studied Regenerative burners are also called High Temperature Furnaces Modeling of half working cycle of such furnaces by four active burners is studied in this project Many different methods areselected to reach a successful model Though all the results are in good agreement with experimental data however complete numerical convergence is not achieved At the end the final results are presented as furnaceand slab temperature curves Moreover temperature velocity and species concentration contours are other partof the results Controlling the furnace pressure in desirable range is also considered This pressure control willretain furnace pressure at atmospheric limit leading to lower heat losses from the hot gases exhausted from thefurnace A moment closure method with an assumed probability function for mixture fraction is used in the presentwork to model the turbulent non premixed combustion process in the furnace Two radiation models are used to calculate the radiation transfer source terms in the energy equation The P1and DO radiation models are compared in this project There were no difference between the two selectedmodels in the final results but DO method reaches convergence faster than P1 The suitable negative pressure at the outlets of the furnace was calculated to be 1300 Pa with no regard to headlosses caused by regenerators The reason of non convergence in this project to solve combustion equations with Fluent software All of theeffects such as geometry quantity and quality of computational grids and numerical solution progress withdefining variety of under relaxation coefficients for all the equations were completely studied KeywordsRegenerative Furnace Regenerator Heat Recovery Industrial Combustion Modeling Mixture Fraction Reheat Furnace

احمد صابونچي

احمد رضا عظيميان

محسن دوازده امامي، محمد رضا سليم پور