STUDY ON TIP LEAKAGE VORTEX IN AN AXIAL FLOW PUMP BASED ON MODIFIED SHEAR STRESS TRANSPORT k-ω TURBULENCE MODEL

Abstract

The tip leakage vortex structure and trajectory in an axial flow pump were investigated numerically and experimentally based on the modified shear stress transport k-ω turbulence model. Numerical results were compared with the experimental leakage vortex trajectories, and a good agreement was presented. The detailed trajectories of tip leakage vortex show that the starting point of tip leakage vortex occurs near the leading edge at small flow rate, and it moves from leading edge to about 30% chord length at design flow rate. At larger flow rate condition, the starting point of tip leakage vortex shifts to the middle of chord.

Keywords

Dates

  • Submission Date2013-01-18
  • Revision Date2013-04-26
  • Acceptance Date2013-04-27
  • Online Date2013-12-28

DOI Reference

10.2298/TSCI1305551Z

References

  1. Chen, G, T., et al., Similarity Analysis of Compressor Tip Clearance Flow Structure, Journal of Turbomachinery, 113 (1991), 2, pp. 260-271
  2. Li, Y. S., Cumpsty, N. A., Mixing in Axial Flow Compressors: Part I - Test Facilities and Measurements in a Four-Stage Compressor, Journal of Turbomachinery, 113 (1991), 2, pp. 161-165
  3. Mailach, R., Lehmann, et al., Rotating Instabilities in an Axial Compressor Originating from the Fluctuating Blade Tip Vortex, Journal of Turbomachchinery, 123 (2000), 3, pp. 453-460
  4. Farrell, K. J., Billet, M. L., A Correlation of Leakage Vortex Cavitation in Axial-Flow Pumps, Journal of Fluids Engineering, 116 (1994), 3, pp. 551-557
  5. Shen, Y. T., et al., Tip Vortex Cavitation Inception Scaling for High Reynolds Number Applications, Journal of Fluids Engineering, 131 (2009), 7, pp. 071301
  6. Tan, C. S., et al., Spike-Type Compressor Stall Inception, Detection, and Control, Annual Review of Fluid Mechanics, 42 (2010), pp. 275-300
  7. Jang, C. M., et al., Analysis of Vertical Flow Field in a Propeller Fan by LDV Measurements and LES - Part I: Three-Dimensional Vortical Flow Structures. Journal of Fluids Engineering, 123 (2001), 4, pp. 748-754
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