3694

3494

كارشناسي ارشد

تبديل انرژي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1386

ده، 167، [II] ص: مصور، جدول، نمودار

ص.ع. به: فارسي و انگليسي

مهندسي مكانيك

ID3494

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

AbstractNitrogen oxides NOx are among the most pollutant species resulting from the combustionphenomena Unfortunately all the available measures to alleviate the formation and emissionof NOx inhibit the combustion efficiency Therefore accurate estimation of NOx incombustion phenomena is an important factor in designing the combustion chambers Thepresent study addresses this issue It starts with a comprehensive survey on different physicalmechanisms of formation and emission of NOx Then a thorough study on mathematicalmodels of the aforementioned mechanisms is presented Based on the limitations inpredicting reactive species from the fluent code a transport equation for the main NOxconstituent is presented Several sub models are presented and discussed to express the sourceterm in this transport equation The turbulence chemistry interaction is taken into account viaa presumed PDF of the mixture fraction and EDC method A post processing computerprogram with several options of the NOx models is developed The validity of NOx modelsand the correctness of the program have been assessed by simulating several diffusion flames and comparing the results with the available experimental data Finally prediction of NOx isrun for an industrial gas turbine combustion champers

محسن دوازده امامي

محمود اشرفي زاده

احمد رضا پيشه ور، احمد صابونچي