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Twenty-Fourth Symposium on Naval Hydrodynamics (2003) / Chapter Skim
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Analysis of a Jet-Controlled High-Lift Hydrofoil with a Flop
Pages 698-707

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From page 698...
... BLC utilizes the added momentum due to the injected fluid to delay flow separation at critical locations on a lifting surface, augmenting lift much beyond what is possible without the injection. For application to marine vehicle control, the concept of a blown flap has several advantages over other power devices (Wilson and von Kerczek, 1979~; (1)
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From page 699...
... study reinforces the validity of the technology and provides insights for optimum design of such devices. CFD study of CC flows for two types of geometry and conditions were also carried out to verify the selection of appropriate numerical schemes and turbulence models.
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From page 700...
... CC flow results are validated against the well-known experimental data for elliptic foil geometry (Kind and Maul, 1968; Englar, 19711. BLC flows are considered for a range of parameters and the results are compared with data obtained from the present experimental study.
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From page 701...
... Foil surface pressure coefficient vs. chord length for Englar case.
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From page 702...
... . k-co RSTM Measured C, 2.27 2.60 2.71 The second case for CC flow is turbulent flow around a 20-percent elliptic foil with circular trailing edge that creates 0.00067c high slots on the upper and lower surfaces at 0.962c from the leading edge, K&M case hereafter (Kind and Maul, 1968~.
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From page 703...
... However, as observed by the Englar case, the k-m model seems to perform quite reasonably, as long as there is a clear jet detachment physically at the trailing edge. Boundary Layer Control Flow around a JetControlled Hydrofoil with a Flap Experimental and computational conditions, measured and computed Car and Cp, and flow field analysis using CFD results for BLC hydrofoil using a blown flap are described and discussed in this section.
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From page 704...
... 3.08 (10,20,0.64) 4.33 3.33 As for CC flow cases, both global and local quantities are considered for analysis and discussion.
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From page 705...
... Flow field alteration is another advantage of employing BLC hydrofoil using a blown flap. Figures 20 through 22 show the pathlines colored by Cp around the hydrofoil.
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From page 706...
... The computational results are analyzed with global and local quantities and validated using available experimental data. The present computational method reproduces the wellknown experimental data for CC flow quite well.
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From page 707...
... Wilson, M.B., and von Kerczek, C., "An Inventory of Some Force Producers for Use in Marine Vehicle Control," David Taylor Naval Ship Research and Development Center Report DTNSRDC-79/097, Nov., 1979.
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Key Terms

  • aiaa paper
  • blown flap
  • surface pressure
  • boundary layer
  • turbulence models

  • blc hydrofoil
  • ship research
  • control surfaces
  • taylor naval
  • cfd study

  • experimental study
  • david taylor
  • marine vehicle
  • computational results
  • naval ship

  • circulation controlled
  • hydrofoil using
  • flow field
  • jet ejection
  • center report

  • local quantities
  • cavitation tunnel
  • trailing edge
  • computational method
  • vehicle control

  • measure forces
  • blc flow
  • control wing
  • pressure taps
  • von kerczek


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