In this paper, results are presented of an experimental investigation into the effectiveness of vortex generator jets in controlling secondary flows in two-dimensional S-duct diffusers. The experiments were performed in uniform and distorted inflow conditions and the performance evaluation of the diffuser was carried out in terms of static pressure recovery and quality of the exit flow. In the case with inflow distortion, tapered fin vortex generators were employed in addition to vortex generator jets to control flow separation that was detected on the wall with inflow distortion. Detailed measurements including total pressure, velocity distribution, surface static pressure, skin friction, and boundary layer measurements were taken at a Reynolds number of These results are presented in terms of static pressure rise, distortion coefficient, and total pressure loss coefficient at the duct exit. For uniform inflow, the use of vortex generator jets resulted in more than a 30 percent decrease in total pressure loss and flow distortion coefficients. In combination with passive device (tapered fin vortex generators), the vortex generator jets reduce total pressure losses by about 25 percent for distorted inflow conditions. A potential application of this method may include control of secondary flows in turbo machinery.
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July 2004
Additional Technical Papers
Secondary Flow Control Using Vortex Generator Jets
R. K. Sullerey, Professor,
R. K. Sullerey, Professor
Department of Aerospace Engineering, Indian Institute of Technology, Kanpur-208 016, India
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A. M. Pradeep, Research Scholar
A. M. Pradeep, Research Scholar
Department of Aerospace Engineering, Indian Institute of Technology, Kanpur-208 016, India
Search for other works by this author on:
R. K. Sullerey, Professor
Department of Aerospace Engineering, Indian Institute of Technology, Kanpur-208 016, India
A. M. Pradeep, Research Scholar
Department of Aerospace Engineering, Indian Institute of Technology, Kanpur-208 016, India
Contributed by the Fluids Engineering Division for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received by the Fluids Engineering Division July 17, 2003; revised manuscript received February 13, 2004. Associate Editor: H. Johari
J. Fluids Eng. Jul 2004, 126(4): 650-657 (8 pages)
Published Online: September 10, 2004
Article history
Received:
July 17, 2003
Revised:
February 13, 2004
Online:
September 10, 2004
Citation
Sullerey, R. K., and Pradeep, A. M. (September 10, 2004). "Secondary Flow Control Using Vortex Generator Jets ." ASME. J. Fluids Eng. July 2004; 126(4): 650–657. https://doi.org/10.1115/1.1779661
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