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Analysis of down-flow, 3-outlet pulverized coal distributor comprising swirl flow to overcome particle roping phenomenon using CFD
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | MUKHTAR, MOHSIN | - |
| dc.date.accessioned | 2018-11-08T08:00:28Z | - |
| dc.date.available | 2018-11-08T08:00:28Z | - |
| dc.date.issued | 2011-08 | - |
| dc.identifier.other | 11743 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/9682 | - |
| dc.description | 학위논문(석사)아주대학교 일반대학원 :에너지시스템학부,2011. 8 | - |
| dc.description.tableofcontents | CHAPTER 01 1 INTRODUCTION 1 1.1. Introduction 2 1.2. IGCC (Integrated Gasification Combined Cycle) System 3 1.3. Roping Phenomenon & Development of Pulverized Coal Distributor (PCD): 4 1.4. Objectives 9 CHAPTER 02 11 MODEL DESCRIPTION 11 2.1. Model 12 2.2. GAMBIT 13 CHAPTER 03 15 NUMERICAL PROCEDURE 15 3.1. Gas Phase Transport Equations 16 3.2. Turbulence 17 3.2.1. Reynolds Averaging 17 3.2.2. Boussinesq Approach 19 3.2.3. Realizable k-ETurbulence Model 20 3.3. Equations for Particle Motion 23 3.4. Stochastic Tracking: 25 3.5. Computational Conditions 27 CHAPTER 04 30 RESULTS & DISCUSSIONS 30 Case 1: Uniform Flow, Without Jets 31 Case 2: Uneven Behavior of Coal Particles, Without Jets 32 Case 3: Introduction of 4 Jets 34 Case 4: Introduction of 3 Jets 36 A. Position and angle of swirl of the jets 36 B. Analysis of the simulation results for position and angle of swirl 40 Case 5: Uneven Behavior of Coal Particles, With Jets 41 Case 6: Coupling between Coal particles and Transport Gas 43 A. Discrete Phase Interaction With Continuous Phase: 43 B. Stochastic Tracking and Two Way Turbulence Model 45 Case 7: Volume Flow Rate of Jet Gas and Experimental Verification 48 CHAPTER 05 51 CONCULSION 51 5.1. Conclusion 52 REFERENCES 54 RECENT PUBLICATIONS 59 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | Analysis of down-flow, 3-outlet pulverized coal distributor comprising swirl flow to overcome particle roping phenomenon using CFD | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.department | 일반대학원 에너지시스템학부 | - |
| dc.date.awarded | 2011. 8 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 569588 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000011743 | - |
| dc.description.alternativeAbstract | The rope like structure formed by pulverized coal in the pneumatic conveying line creates uneven coal distribution among the burners of the entrained bed gasifier. This uneven distribution of pulverized coal particles affects the performance of the gasifier which in turn affects the overall IGCC (Integrated Gasification Combined Cycle) power plant’s performance. Coal distributor is developed whose function is to counteract particle roping phenomenon in order to evenly distribute the pulverized coal to the three burners of the entrained bed gasifier. The pulverized coal distributor (PCD) contains jets which give swirl motion to coal particles in order to produce uniform distribution of coal in the three burners of the gasifier. Optimum position, number of jets and angle of swirl of the jets, used in PCD, are determined for uniform distribution of coal in the burners, through Computational fluid dynamics (CFD). Furthermore, various cases of uneven flow of pulverized coal, due to particle roping, are analyzed. Moreover, CFD simulation along with experimental verification is done on the effect of volume flow rate of jet gas on coal distribution. The Eurler-Lagrangian approach is used to simulate the dilute phase particle motion. Conservation equations for mass and momentum and K-Epsilon Realizable turbulence model is employed to simulate the carried fluid phase in PCD. | - |
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- Graduate School of Ajou University > Department of Energy Systems > 3. Theses(Master)
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