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The correction of support interference effect of belly sting

벨리 스팅 모형 지지부의 간섭 효과 보정기법 연구

  • Published : 2002.12.01

Abstract

Wind tunnel model has some difference in shape compared to the real flight vehicle because of model support system for testing. The support system can make some differences in the measured forces and moments to the flight test data. There are several correction methods involved such as cavity pressure correction and model support interference. Internal balance and belly sting support were used for this wind tunnel test and three types of model support correction methods, variable sting thickness method, dummy sting method, and wire support method, were compared. Variable sting thickness method is well matched with wire support method, which is known for almost interference free.

풍동시험 모형은 모형 지지부 삽입 등으로 실제 비행체와 다른 형상을 갖게 된다. 이러한 형상의 차이는 비행시험과 다른 힘과 모멘트를 발생시키게 되므로 이에 대한 보정은 필수적이다. 이러한 보정에는 cavity 압력 보정, 모형 지지부 간섭 보정 등이 있다. 본 시험에 사용된 모형은 내장밸런스와 함께 벨리 스팅 지지부를 사용하였으며 보정을 위하여 모형지지부 두께변화 방법과 더미 스팅 방법, wire support 방법의 시험결과를 비교하였다. 모형 지지부 두께 변화 방법은 간섭이 거의 없는 것으로 알려진 wire support 방법과 시험결과가 잘 일치하였다.

Keywords

References

  1. Kreeke, C. van de., Verriere, J., Quemard, G., "The Interference of the Model Support Mast with Measurement s of Longitudinal and Lateral Aerodynamic Coefficients", NASA TT-20079, Aug. 1987.
  2. Eckert, D., "Correction Influences on Measurement s Mounted Wind Tunnel Models", AGARD CP 535, Oct. 1993, pp.31-1-31-11.
  3. Rae, William H. Jr., Pope, Alan, "Low Speed Wind Tunnel Testing", John Willey & Sons, pp.204- 213
  4. Barnard, R. H., Philpott, D. R, "Aircraft Flight", Longman Scientific & Technical, p93.
  5. Thwaites, Bryan, "Incompressible Aerodynamics", Dover Publications, Inc., pp 551-554.
  6. Steinbach, D., "Calculation of Support Interferences on the aerodynamic coefficients for a Wind tunnel Calibration Model", Aeronautical Journal, Feb. 1991, pp55-63.
  7. Dietz, W. E. Jr., Altstatt, M. C., "Experimental Investigation of Support Interference on an Ogive Cylinder at High Incidence", AIAA 78-165, Jan. 1978.
  8. Mauch, Thomas N., Nelson, Robert C., "The Influence of Aerodynamic Interference on an High Angle of Attack Wind Tunnel Testing", AIAA 78-827, Jan. 1978.