3697

3497

كارشناسي ارشد

تبديل انرژي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده مكانيك

1386

نه، 170، [II] ص.: مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

محسن دوازده امامي

ابراهيم شيراني

2/7/86

احمد صداقت، احمد صابونچي

1396/02/30

كتابنامه

مكانيك

مهندسي مكانيك

ID3497

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

Abstract The main objective of this thesis was to simulate the combustion of heavy fuel oilsprays which was totally involved with many different physical and chemical aspects suchas heat transfer two phase flows char surface combustion combustion in gas phase CFDmodeling etc To reach the final goal the research was organized into three main parts Inthe first step by developing a computer source code the simulation of evaporation andcombustion of light liquid fuel sprays for two different cases were performed Evaporationof droplets resulted in approval of d2 law Also the effects of recirculation zones and thepercentage of particle presence in the following zones were recognized as the mostimportant factors in the prediction of temperature distribution In the next step fivedifferent char combustion models were applied to the source code in order to find anappropriate model for applying in the combustion modeling of heavy fuel oils By studyingthe combustion of a small char particle in stagnant air Zhou model was chosen as the bestand most general model In the latter case it was reasonably shown that at the mostduration time of particle life history the reaction rate is influenced by the diffusion of air while at small timescales of start and end of the combustion process the particle burningrate is chemically controlled Finally by simulating reacting flow in three different heavyfuel oil fired furnaces the ability of the present CFD code was evaluated All of the caseswere validated against experimental data Most of the predicted results were found to be ina reasonable agreement with the measurements

محسن دوازده امامي

ابراهيم شيراني

احمد صداقت، احمد صابونچي