Prediction of Shock-Standoff Distance and Entropy Distribution for Forward-Facing Cavity
International Journal of Astrophysics and Space Science
Volume 6, Issue 3, June 2018, Pages: 52-61
Received: Jul. 4, 2018; Accepted: Jul. 16, 2018; Published: Aug. 9, 2018
Views 416      Downloads 27
Authors
Gang Wang, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mian Yang, China
Yanguang Yang, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mian Yang, China
Xiaowei Ma, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mian Yang, China
Tao Jiang, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mian Yang, China
Hongming Gong, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mian Yang, China
Rongzong Kong, Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center, Mian Yang, China
Article Tools
Follow on us
Abstract
Experiments are performed on a cylinder with a forward-facing cavity at M = 10 in the FD-14A shock tunnel. The shock-standoff distance and oscillation characteristics are recorded by a high-speed movie, and the dynamic pressure transducer is used to capture the unsteady signal of cavity base. Based on experimental and numerical results, a prediction method for estimating the shock-standoff distance is proposed. Results of shock-standoff distance and oscillation frequency are obtained for experiments in the shock tunnel. The predicted oscillation frequency is in accordance with experimental results. Furthermore, the relation of shock shape and the entropy increase are combined to obtain the characteristics of entropy distribution. As the shock-shape of flat-nosed cylinders is more liable to be influenced than blunt-nosed cylinders with increasing Mach number, the location of the extreme value moves to the surface as the Mach number increases for flat-nosed cylinders, while it remains the identical location for blunt-nosed cylinders.
Keywords
Shock-Standoff Distance, Forward-Facing Cavity, Pressure Oscillation, Entropy Distribution
To cite this article
Gang Wang, Yanguang Yang, Xiaowei Ma, Tao Jiang, Hongming Gong, Rongzong Kong, Prediction of Shock-Standoff Distance and Entropy Distribution for Forward-Facing Cavity, International Journal of Astrophysics and Space Science. Vol. 6, No. 3, 2018, pp. 52-61. doi: 10.11648/j.ijass.20180603.11
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
Engblom, W. A., D. B. Goldstein, and S. P. Schneider, Fluid Dynamics of Hypersonic Forward-Facing Cavity Flow. Journal of Spacecraft and Rockets, 1997. 34 (4): p. 437-444.
[2]
Wang, Z., et al., Experimental investigation on drag and heat flux reduction in supersonic/hypersonic flows: A survey. Acta Astronautics, 2016. 129: p. 95-110.
[3]
Chou, A., S. P. Schneider, and S. H. Collicott, Measurements of the Interaction of an Upstream Laser Perturbation with a Forward-Facing Cavity, in 51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition2013: Grapevine, Texas.
[4]
Yadav, R. and U. Guven, Aerothermodynamics of a hypersonic vehicles with a forward facing parabolic cavity at nose. J Aerospace Engineering, 2014. 228 (10): p. 1863-1874.
[5]
Yadav, R. and U. Guven, Aerodynamic Heating of a Hypersonic Projectile with Forward-Facing ellipsoid Cavity at nose. Journal of Spacecraft and Rockets, 2015. 52 (1): p. 157-165.
[6]
Huebner, L. D. and L. R. Utreja, Mach 10 Bow-shock Behavior of a Forward-Facing Nose Cavity. Journal of Spacecraft and Rockets, 1993. 30 (3): p. 291-297.
[7]
Hartmann, J. and B. Troll, On a New Method for the Generation of Sound Waves. Phys. Rev., 1922. 20: p. 719-727.
[8]
Ladoon, D. W., S. P. Schneider, and J. D. Schmisseur, Physics of Resonance in a Supersonic Forward-Facing Cavity. Journal of Spacecraft and Rockets, 1998. 35 (5): p. 626-632.
[9]
Sambamurthi, J. K., L. D. Huebner, and L. R. Utreja, Hypersonic Flow Over a Cone With Nose Cavity, in AIAA 19th Fluid Dynamics Plasma Dynamics and Lasers Conference1987: Hawaii.
[10]
Marquart, E. J. and J. P. Grubb, Bow Shock Dynamics of a Forward-facing Nose Cavity, in AIAA 11th Aeroacoustics Conference1987: Sunnyvale.
[11]
Engblom, W. A., et al., Fluid dynamics of hypersonic forward-facing cavity flow. AIAA Journal, 1996. AIAA 96-0667.
[12]
Engblom, W. and D. Goldstein, Acoustic Analogy for Oscillations Induced by Supersonic Flow over a Forward-Facing Nose Cavity, in 47th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition2009: Orlando, Florida.
[13]
Yuceil, K. B. and D. S. Dolling, Nose Cavity Effects on Blunt Body Pressure and Temperature at Mach 5. Journal of Thermophysics and Heat Transfer, 1995. 9 (4): p. 612-619.
[14]
Billig, F. S., Shockwave shapes around spherical and cylindrical nosed bodies. Journal of Spacecraft and Rockets, 1967. 4 (6): p. 822-823.
[15]
Engblom, W., et al., Hypersonic Forward-facing cavity flow: an experimental and numerical study, in 33rd Aerospace Sciences Meeting and Exhibit1995: Reno.
[16]
Engblom, W. A., et al., Experimental and Numerical Study of Hypersonic Forward-Facing Cavity Flow. Journal of Spacecraft and Rockets, 1996. 33 (3): p. 353-359.
[17]
Yuceil, K. B. and D. S. Dolling, IR imaging and shock visualization of flow over a blunt body with a nose cavity, in AIAA 34th Aerospace Sciences Meeting and Exhibit1996: Reno.
[18]
Saravanan, S., G. Jagadeesh, and K. P. J. Reddy, Investigation of Missile-Shaped Body with Forward-Facing Cavity at Mach 8. Journal of Spacecraft and Rockets, 2009. 46 (3): p. 577-591.
[19]
Juliano, T. J., et al., Starting Issues and Forward-Facing Cavity Resonance in a Hypersonic Quite Tunnel, in 38th Fluid Dynamics Conference and Exhibit2008: Seattle, Washington.
[20]
Segura, R., Oscillations in a Forward-Facing Cavity Measured Using Laser-Differential Interferometry in a Hypersonic Quiet Tunnel, 2007, Purdue University: West Lafayette, Indiana.
ADDRESS
Science Publishing Group
548 FASHION AVENUE
NEW YORK, NY 10018
U.S.A.
Tel: (001)347-688-8931