Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical Analysis of the High-Subsonic Cavity Flows over a Curved Wall

곡면 벽을 지나는 고아음속 공동 유동에 관한 수치해석적 연구

  • Ye, A Ran (Department of Mechanical Engineering, Andong National University) ;
  • Das, Rajarshi (Department of Mechanical Engineering, Andong National University) ;
  • Kim, Heuy Dong (Department of Mechanical Engineering, Andong National University)
  • Received : 2015.10.22
  • Accepted : 2015.12.21
  • Published : 2016.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Most of the work has been done till now focused on flows over wall mounted cavities in a straight wall where the incoming flow is uniform. However, the investigation on such kind of flow over a cavity mounted on the curved walls has been seldom reported in the existing literatures. In the present study, the numerical analysis was performed to investigate the cavity flow mounted on the curved walls. The effects of wall shape, the curvature radius and the flow Mach number, were investigated for high-subsonic flows. The results show that the static pressure of cavity floor increases as the L/R increases. This effect is found to be more significant when the flow Mach number is higher. The cavity drag for the curved walls are higher as compared with that of straight wall.

공동 유동에 대한 연구는 유동이 균일하게 유입되는 수평면상에 설치된 공동에 대한 연구가 대부분이나, 곡면 벽상에 설치한 공동 유동에 관한 연구에 대해서는 거의 수행되지 않았다. 본 연구에서는 곡면 벽상에 설치한 공동 유동의 특성을 조사하기 위해 수치계산을 수행하였으며, 곡면의 형상, 곡면의 곡률 반경 그리고 유동의 마하수를 변화시켜 고아음속 유동에서의 공동 유동 특성을 조사하였다. 그 결과 공동 바닥의 압력은 L/R이 증가함에 따라 증가하였으며, 유동의 마하수가 높을수록 그 효과가 증가하였다. 공동 저항은 수평면 벽보다 곡면 벽에서 더 높은 값을 가졌다.

Keywords

References

  1. Stallings, R.L. and Wilcox, F.J., "Experimental Cavity Pressure Distributions at Supersonic Speeds," NASA TP-2683, 1987.
  2. Zhang, X., Rona, A. and Edwards, J.A., "The Effect of Trailing Edge Geometry on Cavity Flow Oscillation Driven by a Supersonic Shear Layer," The Aeronautical Journal, Vol. 102, No. 1013, pp. 129-136, 1998.
  3. Atvars, K., Knowles K., Ritchie, S.A. and Lawson, N.J., "Experimental and Computational Investigation of an 'Open' Transonic Cavity Flow," Proceedings of IMechE. Part G: Journal of Aerospace Engineering, Vol. 223, No. 4, pp. 357-368, 2009. https://doi.org/10.1243/09544100JAERO445
  4. Krishnamurthy, K., "Acoustic Radiation from Two-Dimensional Rectangular Cutouts in Aerodynamic Surface," NASA-TN-3487, 1955.
  5. Rossiter, J.E., "Wind Tunnel Experiments on the Flow over Rectangular Cavities at Subsonic and Transonic Speeds," Aeronautical Research Council Reports and Memoranda, No. 3438, 1964.
  6. Plumblee, H.F., Gibson, G.S. and Lassiter, L.W., "A Theoretical and Experimental Investigation of the Acoustic Response of Cavities in an Aerodynamic Flow," WASDD-TR-61-76, 1962.
  7. Rockwell, D. and Naudascher, E., "Review-Self Sustaining Oscillations of Flow Past Cavities," Journal of Fluids Engineering, Vol. 100, No. 6, pp. 152-165, 1978. https://doi.org/10.1115/1.3448624
  8. Bilanin, A.J. and Covert, E.E., "Estimation of Possible Excitation Frequencies for Shallow Rectangular Cavities," AIAA Journal, Vol. 11, No. 3, pp. 347-351, 1973. https://doi.org/10.2514/3.6747
  9. Heller, H.H., Holmes, D.G. and Covert, E.E., "Flow-Induced Pressure Oscillations in Shallow Cavities," Journal of Sound & Vibration, Vol. 18, No. 4, pp. 545-553, 1971. https://doi.org/10.1016/0022-460X(71)90105-2
  10. Gharib, M., and Roshko, A., "The Effect of Flow Oscillations on Cavity Drag," Journal of Fluid Mechanics, Vol. 177, pp. 501-530, 1987. https://doi.org/10.1017/S002211208700106X
  11. Ye, A.R., Das, R. and Kim, H.D., "Investigation of Transonic and Supersonic Flows over an Open Cavity Mounted on Curved Wall(1. Steady Flow Characteristics)," Transactions of the Korean Society of Mechanical Engineers B, Vol. 39, No. 3, pp. 231-236, 2015. https://doi.org/10.3795/KSME-B.2015.39.3.231
  12. Ye, A.R., Das, R. and Kim, H.D., "Investigation of Transonic and Supersonic Flows over an Open Cavity Mounted on Curved Wall(2. Unsteady Flow Characteristics)," Transactions of the Korean Society of Mechanical Engineers B, Vol. 39, No. 6, pp. 477-483, 2015. https://doi.org/10.3795/KSME-B.2015.39.6.477
  13. Zhang, X., "Compressible Cavity Flow Oscillation Due to Shear Layer Instabilities and Pressure Feedback," AIAA Journal, Vol. 33, No. 8, pp. 1404-1411, 1995. https://doi.org/10.2514/3.12845
  14. Grottadaurea, M. and Rona, A., "The Role of the Inflow Momentum Thickness in Subsonic Cylindrical Cavity Noise Generation," Proceedings of the 14th International Congress on Sound and Vibration, Cairns, Australia, pp. 1-8, July 2007.
  15. Rowley, C.W., Colonius, T. and Basu, A.J. "On Self-Sustained Oscillations in Two-Dimensional Compressible Flow over Rectangular Cavities," Journal of Fluid Mechanics, Vol. 455, pp. 315-346, 2002.
  16. Brown, G.L. and Roshko, A., "On Density Effects and Large Structure in Turbulent Mixing Layers," Journal of Fluid Mechanics, Vol. 64, No. 4, pp. 775-816, 1974. https://doi.org/10.1017/S002211207400190X