不同幾何構(gòu)型下液壓管路瞬態(tài)流動研究
發(fā)布時間:2021-02-23 13:57
液壓系統(tǒng)由多個部件和不同幾何形狀的管路組成,從閥門和噴嘴到孔口。當(dāng)流體通過液壓系統(tǒng)的不同部件時,它面臨各種障礙和條件,如突然收縮,膨脹或摩擦。這種情況導(dǎo)致不穩(wěn)定和湍流的流動條件,這對流動特性以及液壓管的固體產(chǎn)生相當(dāng)大的影響。為了避免由于這種湍流引起的任何不利影響,主要關(guān)注點(diǎn)應(yīng)該是了解它對該點(diǎn)流量參數(shù)的影響。這項(xiàng)研究的目的是研究在不同流動條件的影響下流動的各種幾何形狀管路的不同液壓流體的層流和湍流情況。設(shè)計了各種幾何形狀管路,并且在不同的邊界條件下通過這些幾何形狀完成流體流動的分析。從簡單的直管開始,研究入口和出口的速度分布。彎頭也被添加到直管中以分析突然障礙物在流體運(yùn)動路徑中的影響。之后,在管道幾何中添加了多個彎曲,并且逐一研究了所有彎曲處的壓力梯度的性質(zhì)。在管道內(nèi)添加了擋板,為流體提供了非常小的空間,通過在每個連續(xù)擋板上添加側(cè)面上的開口,流動情況更為豐富多變。在出口處添加孔口以及稍后在管道的中間部分中的孔板提供關(guān)于湍流響應(yīng)和壓力脈沖的非常有意義的見解。加入一個狹窄的管子,帶有一個大的入口部分,以模擬靜脈收縮現(xiàn)象。Vena contracta的使用者的位置也基本上使用Fluent解算器...
【文章來源】:哈爾濱工業(yè)大學(xué)黑龍江省 211工程院校 985工程院校
【文章頁數(shù)】:118 頁
【學(xué)位級別】:碩士
【文章目錄】:
摘要
Abstract
Chapter 1 Introduction
1.1 Source and Significance
1.2 Research Spectrum and Literature Review
1.2.1 Research History
1.2.2 Research Abroad
1.2.3 Research in China
1.3 Water Hammer Equation– An Analysis
1.4 Transient Flow Equations
1.5 Main Research Contents
Chapter 2 Fluid Flow in Simple Pipe Geometries
2.1 General steps for a CFD based analysis
2.1.1 Design of Geometry
2.1.2 Meshing
2.1.3 Solver Setup
2.1.4 Post Processing
2.2 Analysis and Results
2.2.1 Modelling
2.2.2 Meshing
2.2.3 Solver Settings/ Setup
2.2.4 General Settings
2.2.5 Viscous Models
2.2.6 Pressure-Velocity Coupling
2.2.7 Solution Calculation
2.2.8 Results
2.3 Pipe with Bend
2.3.1 Laminar flow
2.3.2 Turbulent Flow
2.4 Chapter Summary
Chapter 3 Flow with Intermittent Obstructions
3.1 Recap
3.2 S-Shaped Pipe
3.2.1 Geometry
3.2.2 Meshing
3.2.3 Solver settings
3.2.4 Results
3.3 Straight Pipe with baffle s
3.3.1 Geometry
3.3.2 Meshing
3.3.3 Solver Settings
3.3.4 Results
3.4 Straight Pipe with Orifice
3.4.1 Geometry
3.4.2 Meshing
3.4.3 Flow Cases and Results
3.4.4 Slow velocity,Steady solver,Laminar flow
3.4.5 Steady solver,Turbulent flow
3.4.6 Transient Solver,turbulent flow
3.5 Chapter Summary
Chapter 4 Sudden Contraction,Ripples and Verification from the Experimental Data
4.1 Orifice plate in the center of straight pipe
4.1.1 Geometry
4.1.2 Meshing
4.1.3 Flow Cases and Results
4.2 Formation of Vena-Contracta
4.2.1 Geometry
4.2.2 Meshing
4.2.3 Solver settings and Results
4.3 Adding ripples in the inlet velocity
4.3.1 Equal inlet and outlet sizes
4.3.2 Orifice at the Outlet
4.4 Verification with the Experimental Data
4.4.1 Test Rig
4.4.2 Design and Meshing
4.4.3 Boundary Conditions
4.4.4 Results and Comparison with Experimental Data
4.5 Chapter Summary
Conclusion
結(jié)論
References
Acknowledgement
【參考文獻(xiàn)】:
期刊論文
[1]伴隨氣泡和氣穴低壓管路瞬態(tài)的建模與分析[J]. 蔣丹,李松晶,包鋼. 航空動力學(xué)報. 2007(12)
[2]采用MATLAB Simulink的液壓管路瞬態(tài)壓力脈動分析[J]. 李松晶,鮑文. 工程力學(xué). 2006(09)
[3]含氣泡和氣穴的液壓管路瞬態(tài)實(shí)驗(yàn)研究[J]. 李松晶,朱冬. 機(jī)床與液壓. 2006(08)
[4]有壓輸水管道系統(tǒng)含氣水錘研究[J]. 鄭源,索麗生,屈波,張健,劉德有. 河海大學(xué)學(xué)報(自然科學(xué)版). 2005(03)
[5]液壓系統(tǒng)中流體壓強(qiáng)瞬態(tài)現(xiàn)象的實(shí)驗(yàn)研究與數(shù)值模擬[J]. 傅新,楊華勇,鮑敏,高紅. 機(jī)床與液壓. 2000(05)
本文編號:3047701
【文章來源】:哈爾濱工業(yè)大學(xué)黑龍江省 211工程院校 985工程院校
【文章頁數(shù)】:118 頁
【學(xué)位級別】:碩士
【文章目錄】:
摘要
Abstract
Chapter 1 Introduction
1.1 Source and Significance
1.2 Research Spectrum and Literature Review
1.2.1 Research History
1.2.2 Research Abroad
1.2.3 Research in China
1.3 Water Hammer Equation– An Analysis
1.4 Transient Flow Equations
1.5 Main Research Contents
Chapter 2 Fluid Flow in Simple Pipe Geometries
2.1 General steps for a CFD based analysis
2.1.1 Design of Geometry
2.1.2 Meshing
2.1.3 Solver Setup
2.1.4 Post Processing
2.2 Analysis and Results
2.2.1 Modelling
2.2.2 Meshing
2.2.3 Solver Settings/ Setup
2.2.4 General Settings
2.2.5 Viscous Models
2.2.6 Pressure-Velocity Coupling
2.2.7 Solution Calculation
2.2.8 Results
2.3 Pipe with Bend
2.3.1 Laminar flow
2.3.2 Turbulent Flow
2.4 Chapter Summary
Chapter 3 Flow with Intermittent Obstructions
3.1 Recap
3.2 S-Shaped Pipe
3.2.1 Geometry
3.2.2 Meshing
3.2.3 Solver settings
3.2.4 Results
3.3 Straight Pipe with baffle s
3.3.1 Geometry
3.3.2 Meshing
3.3.3 Solver Settings
3.3.4 Results
3.4 Straight Pipe with Orifice
3.4.1 Geometry
3.4.2 Meshing
3.4.3 Flow Cases and Results
3.4.4 Slow velocity,Steady solver,Laminar flow
3.4.5 Steady solver,Turbulent flow
3.4.6 Transient Solver,turbulent flow
3.5 Chapter Summary
Chapter 4 Sudden Contraction,Ripples and Verification from the Experimental Data
4.1 Orifice plate in the center of straight pipe
4.1.1 Geometry
4.1.2 Meshing
4.1.3 Flow Cases and Results
4.2 Formation of Vena-Contracta
4.2.1 Geometry
4.2.2 Meshing
4.2.3 Solver settings and Results
4.3 Adding ripples in the inlet velocity
4.3.1 Equal inlet and outlet sizes
4.3.2 Orifice at the Outlet
4.4 Verification with the Experimental Data
4.4.1 Test Rig
4.4.2 Design and Meshing
4.4.3 Boundary Conditions
4.4.4 Results and Comparison with Experimental Data
4.5 Chapter Summary
Conclusion
結(jié)論
References
Acknowledgement
【參考文獻(xiàn)】:
期刊論文
[1]伴隨氣泡和氣穴低壓管路瞬態(tài)的建模與分析[J]. 蔣丹,李松晶,包鋼. 航空動力學(xué)報. 2007(12)
[2]采用MATLAB Simulink的液壓管路瞬態(tài)壓力脈動分析[J]. 李松晶,鮑文. 工程力學(xué). 2006(09)
[3]含氣泡和氣穴的液壓管路瞬態(tài)實(shí)驗(yàn)研究[J]. 李松晶,朱冬. 機(jī)床與液壓. 2006(08)
[4]有壓輸水管道系統(tǒng)含氣水錘研究[J]. 鄭源,索麗生,屈波,張健,劉德有. 河海大學(xué)學(xué)報(自然科學(xué)版). 2005(03)
[5]液壓系統(tǒng)中流體壓強(qiáng)瞬態(tài)現(xiàn)象的實(shí)驗(yàn)研究與數(shù)值模擬[J]. 傅新,楊華勇,鮑敏,高紅. 機(jī)床與液壓. 2000(05)
本文編號:3047701
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