Journal of Ship and Ocean Technology

The Society of Naval Architects of Korea (대한조선학회)
권호 표지

Frequency Domain Analysis of Lifting Problems with Explicit Kutta Condition

  • Published : 2003.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

Explicit Kutta condition approximation, proved useful in existing time-domain solver of the unsteady propeller problem, requires a specified functional behavior of the vorticity in space near the trailing edge. In this paper, the strength of the discrete vortices is controlled to have a specified behavior in space in the frequency domain approach. A new formulation is introduced and is implemented for analysis of a lifting surface of a rectangular planform. Sample computations carried out according to the new formulation compares well with that of existing unsteady lifting problem in the time domain.

Keywords

References

  1. CHAI, H,B 1990 Analysis of Unsteady 2-Dimensional Hydrofoil Problem by Discrete Vortex Method. S.M. Thesis, Department of Naval Architecture Ocean Engineering, Chungnam National University
  2. CHOW, C. Y. 1979 An Introduction to Computational Fluid Mechanics. Department of Aerospace Engineering Sciences University of Cololado, John Wiley and Sons, Inc.
  3. CUMMINGS, D.E. 1973 Numerical Prediction of Propeller Characteristics. J. of Ship Research, 17, 1
  4. JAMES, R.M. 1972 On the Remarkable Accuracy of the Vortex Lattice Method. Computer Methods in Applied Mechanics and Engineering, 1
  5. KERWIN, J.E. 1961 The Solution of Propeller Lifting Surface Problems by Vortex Lattice Methods. Department of Naval Architecture and Marine Engineering, M.I.T.
  6. KERWIN, J.E. 1973 Computer Techniques for Propeller Blade Section Design. International Shipbuilding Progress, 20, pp. 227-251
  7. KERWIN, J.E. AND FRYDELUND, O. 1977 The Development of Numericals for the Computation of Unsteady Propeller Force. Simposium on Hydrodynamics of Ship and Offshore Propulsion System, Oslo, Norway
  8. KERWIN, J.E. AND LEE, C.S. 1978 Prediction of Steady and Unsteady Marine Propeller Performance by Numerical Lifting-Surface Theory. Trans. SNAME, 86
  9. KIM, H.T. AND LEE, C.S. 1981 Solution of Unsteady Hydrofoil Problem by Discrete Vortex Method with Application to Fish Propulsion. J. of SNAK, 18, 3
  10. LEE, C.S. 1977 A Numerical Method for the Solution of the unsteady Lifting Problem Rectangular and Elliptic Hydrofoils. S.M. Thesis, Department of Ocean Engineering, M.I.T.
  11. LEE, C.S. 1979 Prediction of Steady and Unsteady Performance of Marine Propellers with or without Cavitation by Numerical Lifting Surface Theory. Ph.D. Thesis, Department of Ocean Engineering, M.I.T., Cambridge, Mass.
  12. MORAN, J. 1984 An Introduction to Theoretical and Computational Aerodynamics. John Wiley and Sons, Inc.
  13. NEWMAN, J.N. 1977 Marine Hydrodynamics. Department of Ocean Engineering, The M.I.T. Press
  14. TSAO, S. K. 1975 Documentation of Programs for the Analysis of Performance and Spindle Torque of Controllable Pitch Propellers. J. of Ship Research, 17, 1