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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 趙修武(Shiu-Wu Chau) | |
| dc.contributor.author | Wei-You Huang | en |
| dc.contributor.author | 黃偉祐 | zh_TW |
| dc.date.accessioned | 2022-11-24T03:06:56Z | - |
| dc.date.available | 2022-12-06 | |
| dc.date.available | 2022-11-24T03:06:56Z | - |
| dc.date.copyright | 2022-01-17 | |
| dc.date.issued | 2021 | |
| dc.date.submitted | 2021-12-08 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/80451 | - |
| dc.description.abstract | 本研究建立以貼壁非正交網格求解以磁流體動力模型描訴的軸對稱熱電漿流場的數值方法。本研究以有限體積法離散連續方程式、動量方程式、能量方程式和紊流模型，流場內的電流分佈由安培定律求得，磁場則是利用歐姆定律求得。流場中速度與壓力的耦合關係以SIMPLE法加以拆解，以隱式計算方法聯立求解離散後的流場統御方程式。本研究探討Step以及Horn設計根式非傳輸型火炬在氮氣流量範圍25至95 SLM以及工作電流範圍40至90 A的電漿火炬特性。根式火炬陰極位置假設固定於負電極處，陽極位置則是利用實驗電壓加以推估。Step及Horn 電漿火炬設計的出口平均軸向速度分別約為80至120 m/s以及20至80 m/s，出口平均溫度則皆介於3000至5000 K之間。Step及Horn 電漿火炬設計的出口平均軸向速度分別正比於工作電流的0.587次方及1.504次方，以及分別正比於流量的0.3796次方及0.019次方。出口平均溫度則是正比於流量的-0.4694次方及-0.4376次方，以及分別正比於工作電流的0.3389次方及0.4038次方。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2022-11-24T03:06:56Z (GMT). No. of bitstreams: 1 U0001-0612202115070900.pdf: 14047278 bytes, checksum: 97f76402d70dde7f2fc575d8df7d1b1b (MD5) Previous issue date: 2021 | en |
| dc.description.tableofcontents | Abstract i 摘要 ii Contents iii Nomenclature v List of Figures ix List of Tables xii Chapter 1 Introduction 1 1.1 Overview 1 1.2 Literature Review 3 Chapter 2 Numerical Methods 4 2.1 Governing Equations 4 2.2 Numerical Approach 7 2.3 Convection Term Approximation 8 2.4 Diffusion Term Approximation 10 2.4.1 Momentum Equation 12 2.4.2 Energy Equation 24 2.4.3 Current Continuity Equation 27 2.4.4 Turbulence Kinetic Energy Equation 29 2.4.5 Turbulence Dissipation Rate Equation 32 2.5 Magnetic Field Calculation 35 2.6 Solution Procedure 37 Chapter 3 Numerical Setup 39 3.1 Computational Domain 39 3.2 Boundary Conditions 42 3.3 Mesh 48 3.4 Mesh Dependency 49 3.5 Torch Operation Characteristics 54 3.6 Convergence History 55 3.7 Case Description 57 Chapter 4 Numerical Results 58 4.1 Validation 58 4.2 Verification 60 4.3 Flow Characteristics of Step Design 63 4.3.1 Influence of Working Current 63 4.3.2 Influence of Flow Rate 74 4.4 Flow Characteristics of Horn Design 85 4.4.1 Influence of Working Current 85 4.4.2 Influence of Flow Rate 97 4.5 Outflow Characteristic 108 Chapter 5 Conclusion 119 References 121 | |
| dc.language.iso | en | |
| dc.subject | 磁流體動力模型 | zh_TW |
| dc.subject | 電漿火炬 | zh_TW |
| dc.subject | 氮氣 | zh_TW |
| dc.subject | 熱電漿 | zh_TW |
| dc.subject | 非傳輸型 | zh_TW |
| dc.subject | 直流電 | zh_TW |
| dc.subject | 非正交網格 | zh_TW |
| dc.subject | Non-transferred | en |
| dc.subject | Magnetohydrodynamic Model | en |
| dc.subject | Non-orthogonal Grid | en |
| dc.subject | Direct Current | en |
| dc.subject | Plasma Torch | en |
| dc.subject | Nitrogen | en |
| dc.subject | Thermal Plasma | en |
| dc.title | 以非正交網格方法模擬軸對稱熱電漿流場 | zh_TW |
| dc.title | Modeling of Axisymmetric Thermal Plasma Flow Using a Non-orthogonal Grid Approach | en |
| dc.date.schoolyear | 110-1 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 戴璽恆(Hsin-Tsai Liu),廖英皓(Chih-Yang Tseng),魏大欽,陳明志,陳孝輝 | |
| dc.subject.keyword | 電漿火炬,氮氣,熱電漿,非傳輸型,直流電,非正交網格,磁流體動力模型, | zh_TW |
| dc.subject.keyword | Plasma Torch,Nitrogen,Thermal Plasma,Non-transferred,Direct Current,Non-orthogonal Grid,Magnetohydrodynamic Model, | en |
| dc.relation.page | 124 | |
| dc.identifier.doi | 10.6342/NTU202104517 | |
| dc.rights.note | 同意授權(限校園內公開) | |
| dc.date.accepted | 2021-12-08 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 工程科學及海洋工程學研究所 | zh_TW |
| 顯示於系所單位： | 工程科學及海洋工程學系 | |
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