Title Page
Abstract
Contents
Nomenclature 11
Chapter 1. Introduction 14
1.1. Study Background 14
1.2. Purpose of Research 16
Chapter 2. Methodology 17
2.1. Experimental setup 17
2.2. Numerical setup and boundary conditions 23
Chapter 3. Results and Discussion 27
3.1. Bifurcation region leading into ESP 27
3.2. Inlet of the ESP diffuser 31
3.3. Diffuser 35
3.4. Collection chamber 46
Chapter 4. Conclusions 52
Bibliography 54
초록 59
Table 1. PIV measurement conditions 20
Table 2. PIV uncertainty information 21
Table 3. Mean error (%) between CFD results and PIV measurements 34
Figure 1. (a) Schematic of ESP model and inlet duct with guide vanes; (b) side view of ESP model; (c) image of model 18
Figure 2. Schematic of the experimental setup showing ESP model connected to closed-loop wind tunnel 20
Figure 3. Grid dependency test: (a) fully resolved mesh; (b) porous media model for perforated plates. 26
Figure 4. Streamlines and normalized velocity magnitude contour in the bifurcation region: (a) fully resolved mesh and (b) porous... 28
Figure 5. (a) Streamwise velocity contour behind the bottom guide vane, and comparison of streamwise velocity profiles at (b)... 30
Figure 6. Contours of normalized streamwise velocity at ROI #2 (diffuser inlet) for (a) left and (b) right duct obtained from the... 32
Figure 7. Normalized streamwise velocity profiles in ROI #2. 34
Figure 8. (a) Reference frame and (b) pressure recovery coefficient distribution 36
Figure 9. Side view of streamlines by (a) fully resolved mesh, (b) porous media model and Top view of streamlines by (c) fully... 38
Figure 10. RSD distribution inside ESP. 40
Figure 11. RZS distribution inside ESP. 42
Figure 12. I₁, I₂, and E parameter distribution 45
Figure 13. Normalized streamwise velocity contour at x/L=1.01. 47
Figure 14. Contour of normalized streamwise velocity at ROI #3 (x/L=1.6). 49
Figure 15. Normalized streamwise velocity profiles at x/L=1.6. 51