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研究生：	馬杰 Dhanabal, Daljit Majil
論文名稱：	離心壓縮器性能和流量損失的CFD分析 CFD ANALYSIS ON CENTRIFUGAL COMPRESSOR PERFORMANCE AND FLOW LOSSES
指導教授：	賴維祥 Lai, Wei-Hsiang
學位類別：	碩士 Master
系所名稱：	工學院 - 航空太空工程學系 Department of Aeronautics & Astronautics
論文出版年：	2020
畢業學年度：	108
語文別：	英文
論文頁數：	150
中文關鍵詞：	CFD 、離心壓縮機、葉輪、流量損失、等熵效率、渦輪增壓器，微型渦輪機
外文關鍵詞：	CFD, Centrifugal Compressor, Impeller, Flow losses, Isentropic Efficiency, Turbocharger, Microturbine
相關次數：	點閱：159 下載：8
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本研究工作主要在探討微型渦輪裝置中典型離心壓縮器的效率和流量損失。由於效率在離心壓縮器的性能中至關重要，而離心壓縮器的性能優於其他壓縮器。本研究設計一款單級離心壓縮器，並參考TD-08渦輪增壓器進行了基本分析計算，並使用ANSYS 2019 R3 CFX進行了1D，2D和3D數值模擬， CFD結果提供了後掠角的變化目前研究工作的另一個重要設計參數。使用現有文獻中的適當數學模型來計算處理離心壓縮器中的損失。通過更改葉輪的幾何參數，對葉片1和葉片2的流動損失進行了分析。經由分析葉片1和葉片2的不同幾何構型，發現了具有優化設計點的新的優化葉片，可以將葉片1的效率提高到2.7％，將葉片2的效率提高到1.9％。相對流場損失降低到令人滿意的水平。

The present work deals with efficiency and flows losses of a typical centrifugal compressor in microturbine. Since efficiency plays a vital role in the performance of centrifugal compressor. A single-stage centrifugal compressor has been designed with basic analytical calculation with reference of TD-08 turbocharger which is also undergone for 1D, 2D and 3D numerical simulation using an academic version of ANSYS 2019 R3 CFX, CFD results were found and variations of backswept angle gives another design parameter for current research work. Blade 1 and blade 2 has been analyzed for flow losses by changing geometry parameters of the impeller, discussed in existing research works. Flow losses have been calculated using an appropriate mathematical Model found in the existing literature which deals with losses in a centrifugal compressor. By analyzing Blade 1 and blade 2 for different geometry configuration, new optimized blades with optimized design points have been found that can enhance the efficiency up to 2.7% for blade 1 and 1.9% for blade 2. Relatively flow losses also reduced to a satisfactory level.

Table of Contents
摘要…………..………………………………………………………………I
Abstract……………………………………………………………………...II
Acknowledgement………………………………………………………….III
Table of Contents…………………………………………………………...IV
List of Tables..……………………………………………………………VIII
List of Graphs ……………………………………………………………..XV
List of Figures……………...……………………………………….…..XVIII
Nomenclatures…………………………………………………………... XIX

Chapter 1: Introduction	1
1.1 Motivation	1
1.2 Microturbine	1
1.3 Turbocharger	5
1.4 Centrifugal Compressor	7
1.5 Research Problem	9
1.6 CFD	9
1.7 Meshing	11
1.8 Boundary Conditions	13
1.9 Turbulence Model	14
1.10 Computational tools	17
Chapter 2: Literature Survey	28
2.1 General Design Process of Centrifugal Compressor	28
2.2 Effect Splitter Blades	29
2.3 Effect of Diffuser Configuration	30
2.4 Numerical Simulation of Centrifugal Compressor	30
2.5 Influence of Volute Configuration	31
2.6Losses in Centrifugal Compressor	32
2.7 Computational Tools	33
Chapter 3: 1-D Design and Analysis	34
3.1 TD-08	34
3.2 Design Calculations	35
3.3 1-D Analysis	40
3.4 1-D Results	42
Chapter 4: 2-D Simulation of Impeller	43
4.1 Blade Generation	43
4.2 Throughflow Analysis	44
4.3 Boundary Conditions	43
4.4Results	45
Chapter 5: Grid Generation of Impeller	50
5.1 Turbogrid	50
5.2 Importance of Meshing	50
5.3 Mesh Counts and Settings	51
5.4 Meshed Impeller	53
5.5 Mesh Analysis	56
Chapter 6: 3D Simulation of Impeller	57
6.1 Turbulence Model	57
6.2 Boundary Conditions	59
6.3 Results	60
6.4 Analysis for Different Configuration	67
Chapter 7: Determination of Design Point for Reduced flow loss and Enhanced Performance	75
7.1 Blade 1 & Blade 2	75
7.2Influence of parameters	75
7.3 Optimization of Blade 1	76
7.4 Optimization of Blade 2	94
Chapter 8: Volute & Diffuser	116
8.1 Diffuser Model	119
8.2Volute Model	131
Chapter 9: Results & Discussion	134
9.1 Contours	136
9.2 Graphical Data of Blade 3	137
9.3 Graphical Data of Blade 4	140
9.4 Post Processing Data of Diffuser & Volute	142
9.5 Performance of Optimized Blade Design Points	144
9.6 Discussion of Optimized Blade Design Points	145
Chapter 10: Conclusions	148
References


                                    

[1] Design of Centrifugal Compressor by Q.N Nagpurwala
[2] Chris Robinson, Mick Casey, Ian Woods, An integrated approach to the aero-mechanical optimisation of turbo Compressors; 2011- current trends in Design and computation of turbomachinary.
[3] Giovanna Cavazzini, Giorgio Pavesi, Alberto Santolin, Guido Ardizzon , Renzo Lorenzi; Using splitter Blades to improve suction Performance of Centrifugal Impeller pumps: journal of power and energy 2014
[4] S. Shaaban; Design optimization of a Centrifugal Compressor vaneless diffuser; International journal of refrigeration 2015
[5] Vivek V. Kulkarni, AnilT.R, Rajan N.K.S; An Impeller Blade Analysis of Centrifugal gas Compressor using CFD; International Journal of innovation in engineering and technology 2016
[6] Amrit agney, Suraj Singh, Srinivas G; Structural and Fluid Flow Analysis of subsonic aircraft jet engine Centrifugal Compressor; materials today proceedings 2018
[7] Arnold Whitefield, Mark A Johnson; The Effect of Volute Design on the Performance of a Turbocharger Compressor; International Compressor Engineering Conference 2002
[8] Elkin I, Guiterrez Velasquez; Determination of a suitable set of Losses Models for Centrifugal Compressor Performance prediction; Chinese Journal of Aeronautics 2017
[9] Rui Chen, Xiaoyang; Total Pressure Losses Mechanism of Centrifugal Compressor; Mechanical Engineering Research 2014
[10] Barend W. Botha, Adriaan Moolman; Determining the impact of the Different Losses on Centrifugal Compressor Design; R&D journal 2005.
[11] Cheng Xu, Michael Muller; Development and Design of a Centrifugal Compressor Volute; International Journal Of Rotating Machinery 2005.
[12] Munzer Shehadeh Yousef Ebaid, Qusai Zuhair Mohammad Al-Hamdan; Design of single stage Centrifugal Compressor as part of a microturbine running at 6000rpm, Developing a Maximum of 60kW Power Output; American Journal of Aerospace Engineering 2017.
[13] ANSYS TurboSystem User's Guide
[14] Applied Computational Fluid Dynamics, Lecture notes by André Bakker
[15] ANSYS VistaCCD User's Guide
[16] ANSYS Turbogrid User's Guide
[17] ANSYS Bladegen User's Guide
[18] ANSYS VistaTF User's Guide
[19] ANSYS CFX User's Guide
[20] CATIA User's Guide
[21] Centrifugal Compressors: a strategy for aerodynamic Design and Analysis / Ronald H. Aungier.
[22] Compressor aerodynamics / N.A. Cumpsty.

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