1. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Experimental apparatus flow chart: 1 water tank, 2 submersible pump, 3 valve, 4 pressure meter, 5 thermometer, 6 flowmeter, 7 experimental section, 8 spiral generator, 9 glass box, 10 laser emission and collection system, 11 computer data acquisition system Figure Legend:

2. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 LDV system diagram: 1 He-Ne laser, 2 coolant mechanism, 3 collimator, 4 dispersion prism, 5 plane mirror, 6 differentiation converter, 7 beam separator, 8 acousto-optic modulator, 9 plane mirror, 10 convex lens, 11 experimental section profile, 12 doppler signal processor, 13 computer data acquisition system Figure Legend:

3. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Vane Figure Legend:

4. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Measurement section diagram Figure Legend:

5. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Axial velocity distribution from JM1 to JM5 Figure Legend:

6. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Axial velocity distribution in different Reynolds number Figure Legend:

7. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 The influence of spiral angle on axial velocity distribution Figure Legend:

8. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 The influence of vane area on axial velocity distribution Figure Legend:

9. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Tangential velocity distribution from JM1 to JM5 Figure Legend:

10. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Tangential velocity in different section Figure Legend:

11. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 The influence of spiral angle on the tangential velocity Figure Legend:

12. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 The influence of vane area on the tangential velocity Figure Legend:

13. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Axial turbulence intensity distribution Figure Legend:

14. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Tangential turbulence intensity distribution Figure Legend:

15. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Tangential velocity variation curve Figure Legend:

16. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 Spiral flow intensity attenuation characteristic curve Figure Legend:

17. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 The relation between Re and B Figure Legend:

18. Date of download: 6/2/2016 Copyright © ASME. All rights reserved. From: Experimental Research on Velocity Distribution and Attenuation Characteristic of Spiral Flow by Laser Doppler Velocimeter J. Fluids Eng. 2013;136(1):011104-011104-9. doi:10.1115/1.4025532 The error analysis on Eq. (14) results Figure Legend: