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Numerical Prediction of Acoustic Load Around a Hammerhead Launch Vehicle at Transonic Speed

해머헤드 발사체의 천음속 음향하중 수치해석

  • Choi, Injeong (Department of Aerospace Engineering, Seoul National University) ;
  • Lee, Soogab (Department of Aerospace Engineering, Seoul National University)
  • Received : 2020.07.26
  • Accepted : 2020.12.07
  • Published : 2021.01.01

Abstract

During atmospheric ascent of a launch vehicle, airborne acoustic loads act on the vehicle and its effect becomes pronounced at transonic speed. In the present study, acoustic loads acting on a hammerhead launch vehicle at a transonic speed have been analyzed using ��-ω SST based IDDES and the results including mean Cp, Cprms, and PSD are compared to available wind-tunnel test data. Mesh dependency of IDDES results has been investigated and it has been concluded that with an appropriate turbulence scale-resolving computational mesh, the characteristic flow features around a transonic hammerhead launch vehicle such as separated shear flow at fairing shoulder and its reattachment on rear body as well as large pressure fluctuation in the region of separated flow behind the boat-tail can be predicted with reasonable accuracy for engineering purposes.

발사체가 대기 중에서 상승 비행 시 공기역학적 현상에 기인한 음향하중을 받는데 천음속 영역에서 그 영향이 커진다. 본 연구에서는 천음속 조건에서 해머헤드 발사체 외부에 작용하는 음향하중을 ��-ω SST 난류모델 기반 IDDES 법으로 해석하여 시간 평균 압력계수, 표면 압력섭동, 압력섭동 파워 스펙트럼을 분석하고 가용한 풍동실험 데이터와 비교하였다. IDDES 결과의 격자 의존성을 검토하였으며, 난류 스케일 분해가 가능한 적절한 계산격자를 사용한 경우 천음속 헤머헤드 발사체의 특징적인 유동 현상인 페어링 어깨에서의 유동 박리와 박리 유동의 후방 동체 재 부착, 보트 테일 후방에서의 높은 압력섭동을 공학적으로 유의미한 정확도로 예측 가능함을 확인하였다.

Keywords

Acknowledgement

본 연구는 한국연구재단을 통해 미래창조과학부의 우주핵심기술개발사업(NSL)으로부터 지원받아 수행되었습니다(2018M1A3A3A02065892). 또한 산업통상자원부(MOTIE)와 한국에너지기술평가원(KETEP)의 지원을 받아 수행되었습니다(No. 20194030202300).

References

  1. Lubert C. P., "From Sputnik to SpaceX® - 60 Years of Rocket Launch," Acoustics Today, Vol. 14, Issue 4, 2018, pp. 38-46. https://doi.org/10.1121/AT.2018.14.4.40
  2. Arenas, J. P. and Margasahayam, R. N., "Noise and Vibration of Spacecraft Structures," Ingenaire: Revista Chilena de Ingenieria, Vol. 14, No. 3, 2006, pp. 251-264.
  3. Houston, J., Counter, D., Kenny, J. and Murphy, J., "ATK Launch Vehicle (ALV-X1) Liftoff Acoustic Environments-Prediction vs. Measurement," 15th AIAA/CEAS Aeroacoustics Conference, May 2009.
  4. Rainey, G., "Progress on the Launch-Vehicle Buffeting Problem," Journal of Spacecraft and Rockets, Vol. 2, No. 3, 1965, pp. 289-299. https://doi.org/10.2514/3.28174
  5. Coe, C. F. and Nute, J. B., "Steady and Fluctuating Pressures at Transonic Speeds on Hammerhead Launch Vehicles," NASA TM X-778, 1962.
  6. Coe, C. F., "The Effects of Some Variations in Launch-Vehicle Nose Shape on Steady and Fluctuating Pressures at Transonic Speeds," NASA TM X-646, 1962.
  7. Robinson, R. C., Wilcox, P. R., Gambucci, B. J. and George, R. E., "Dynamic Response of a Family of Axisymmetric Hammerhead Models to Unsteady Aerodynamic Loading," NASA TN D-4504, 1968.
  8. Lowson, M. V., "Prediction of Boundary Layer Fluctuations," Wyle Laboratories Report WR 67-15, 1967.
  9. Robertson, J. E., "Prediction of In-flight Fluctuating Pressure Environments Including Protuberance Induced Flow," Wyle Laboratories Report WR 71-10, March 1971.
  10. Corcos, G. M., "The Structure of the Turbulent Pressure Field in Boundary Layer Flows," Journal of Fluid Mechanics, Vol. 18, No. 3, 1964, pp. 353-378. https://doi.org/10.1017/S002211206400026X
  11. Efimtsov, B. M., "Characteristics of the Field of Turbulent Wall Pressure Fluctuations at Large Reynolds Numbers," Soviet Physics Acoustics, Vol. 28, No. 4, 1982, pp. 289-292.
  12. Yang, M. Y. and Wilby, J. F., "Derivation of Aero-Induced Fluctuating Pressure Environments for Ares I-X," AIAA paper 2008-2801, May 2008.
  13. Choi, I., "Acoustic Load Reduction in Launch Vehicle Payload Fairing Using Turbulent Pressure-Fluctuation Prediction and FE-SEA Hybrid Method," Master Thesis, Seoul National University, August 2020.
  14. Tsutsumi, S. and Takaki, R., "Hybrid LES/RANS Simulations of Transonic Flowfield around a Rocket Fairing," AIAA 2012-2900, June 2012.
  15. Murman, S. M. and Diosady, L. T., "Simulation of a Hammerhead Payload Fairing in the Transonic Regime," AIAA 2016-1548, January 2016.
  16. Murman, S. M., Blonigan, P. J. and Diosady, L. T., "Comparison of Transonic Buffet Simulations with Unsteady PSP Measurements for a Hammerhead Payload Fairing," AIAA 2017-1404, January 2017.
  17. Liu, Y., Wang, G., Zhu, H. and Ye, Z., "Numerical Analysis of Transonic Buffet Flow around a Hammerhead Payload Fairing," Aerospace Science and Technology, Vol. 84, 2019, 604-619. https://doi.org/10.1016/j.ast.2018.11.002
  18. Zore, K., Sasanapuri, B., Azab, M., Shah, S. and Stokes, J, "Ansys Scale Resolving Simulations of Launch-Vehicle Configuration at Transonic Speeds," 21th Annual CFD Symposium, August 8-9, 2019.
  19. Spalart, P. R., Deck, S., Shur, M. L., Squires, K. D., Strelets, M. K. and Travin, A., "A new version of detached eddy simulation, resistant to ambiguous grid densities," Theoretical and Computational Fluid Dynamics, Vol. 20, No. 3, 2006, pp. 181-195. https://doi.org/10.1007/s00162-006-0015-0
  20. Menter, F. R., "Stress-Blended Eddy Simulation (SBES) - A New Paradigm in Hybrid RANS-LES Modeling," Proceedings of the 6th Symposium on Hybrid RANS-LES Methods, 2016, pp. 1-17.
  21. Schuster, D. M., Panda, J., Ross, J. C., et al., Investigation of Unsteady Pressure-Sensitive Paint (uPSP) and a Dynamic Loads Balance to Predict Launch Vehicle Buffet Environments, NASA/TM-2016-219352, November 2016.
  22. Sellers, M. E., Nelson, M. A., Roozeboom, N. H. and Burnside, N. J., "Evaluation of Unsteady Pressure Sensitive Paint Measurement Technique for Space Launch Vehicle Buffet Determination," AIAA 2017-1402, 2017.
  23. Panda, J., Garbeff, T. J., Burnside, N. J. and Ross, J. C., "Unsteady Pressure Fluctuations Measured on a Hammerhead Space Vehicle and Comparison with Coe and Nute's 1962 Data," International Journal of Aeroacoustics, Vol. 17, Issue 1-2, 2018, pp. 70-87. https://doi.org/10.1177/1475472X17743626
  24. Panda, J., Roozeboom, N. H. and Ross, J. C., "Wavenumber-Frequency Spectra of Pressure Fluctuations on a Generic Space Vehicle Measured via Unsteady Pressure-Sensitive Paint," AIAA Journal, Vol. 57, No. 5, 2019, pp. 1801-1817. https://doi.org/10.2514/1.J057449
  25. Spalart, P. R., "Detached-Eddy Simulation," Annual Review of Fluid Mechanics, Vol. 41, No. 1, January 2009, pp. 203-229. https://doi.org/10.1146/annurev.fluid.010908.165130
  26. Menter, F. R., Kuntz, M. and Langtry, R. "Ten Years of Experience with the SST Turbulence Model," Turbulence, Heat and Mass Transfer, Begell House Inc., 2003, pp. 625-632.
  27. Shur, M. L., Spalart, P. R., Strelets, M. K. and Travin, A. K., "A Hybrid RANS-LES Approach With Delayed-DES and Wall-Modelled LES Capabilities," International Journal of Heat and Fluid Flow, Vol. 29, No. 6, December 2008, pp. 1638-1649. https://doi.org/10.1016/j.ijheatfluidflow.2008.07.001
  28. Gritskevich, M. S., Garbaruk, A. V., Schutze, J. and Menter, F. R., "Development of DDES and IDDES Formulations for the k-ω Shear Stress Transport Model," Flow, Turbulence and Combustion, Vol. 88, 2012, pp. 431-449. https://doi.org/10.1007/s10494-011-9378-4
  29. Han, Y., He, Y. and Le, J., "Modification to Improved Delayed Detached-Eddy Simulation Regarding the Log-Layer Mismatch," AIAA Journal, Vol. 58, No. 2, February 2020, pp. 712-721. https://doi.org/10.2514/1.j058535
  30. Menter, F. R., "Two-Equation Eddy-Viscosity Turbulence Models for Engineering Applications," AIAA Journal, Vol. 32, No. 8, 1994, pp. 1598-1605. https://doi.org/10.2514/3.12149
  31. http://www.iowahills.com/