Physics

Qin Luo1, Yu-Hua Chen1, Feng-Juan Ju1 and Guang-Ming Guo This email address is being protected from spambots. You need JavaScript enabled to view it.2

1College of Information Engineering, Jiangxi University of Technology, Nanchang 330098, P.R. China
2School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, P.R. China

 

Received: August 2, 2016
Accepted: January 7, 2017
Publication Date: June 1, 2017

Download Citation: ||https://doi.org/10.6180/jase.2017.20.2.10  

ABSTRACT

Near space has been paid more and more attentions in recent years due to its military application value and flying vehicles in near space usually have hypersonic speeds. The temperature distribution of aerodynamic flow field over optic window of optical seeker of a flying vehicle is quite non-uniform and has a great temperature gradient due to the strong shock wave and aerodynamic heating. The direct simulation Monte Carlo based on Boltzmann equation was used for computations of aerodynamic flow surrounding optical seeker. Both mean temperature contour over optical window and temperature profiles along the vertical and horizontal lines at some specific locations nearby optical window were provided to quantitatively investigate temperature distribution characteristics over optical window in near space. Several cases, in which the altitude, without/with cooling jet, and flight Mach number were taken into account, were performed to research temperature distribution characteristics in detail. The results indicated that temperature distribution was affected observably by altitude and Mach number, and the cooling jet is able to drastically reduce the temperature gradient nearby the optic window.


Keywords: Temperature Distribution, Optical Window, DSMC, Near Space, Hypersonic


REFERENCES

  1. [1] Guo, G. M., Liu, H. and Zhang, B., “Aero-optical Effects of an Optical Seeker with Supersonic Jet for Hypersonic Vehicles in Near Space,” Applied Optics, Vol. 55, No. 17, pp. 4741-4751 (2016). doi: 10.1364/AO. 55.004741
  2. [2] Hu, R. F., Wu, Z. N., Wu, Z., Wang, X. X. and Tian, Z. W., “Aerodynamic Map for Soft and Hard Hypersonic Level Flight in Near Space,” Acta Mechanica Sinica, Vol. 25, No. 4, pp. 571-575 (2009). doi: 10.1007/ s10409-009-0264-4
  3. [3] Walker, S. H. and Rodgers, F., “Falcon Hypersonic Technology Overview,” Proc. of the 13th AIAA International Space Planes and Hypersonics Systems and Technologies Conference, Capua, Italy, May. 16, AIAA-3253 (2005). doi: 10.2514/6.2005-3253
  4. [4] Hong, Z. C., Huang, J. C., Lee, S. M. and Lin, H. W., “Numerical Analysis of the Step Jump Structure of a Scramjet Flow by the DSMC Method,” Journal of the Chinese Institute of Engineers, Vol. 37, No. 6, pp. 815826 (2014). doi: 10.1080/02533839.2013.839421
  5. [5] Guo, G. M., Liu, H. and Zhang, B., “Characters of the Recirculation Zone of Backward Facing Step for Hypersonic in Near Space,” Journal of Aeronautics, Astronautics and Aviation, Vol. 48, No. 1, pp. 5764 (2016). doi: 10.6125/15-0911-863
  6. [6] Lee, C. Y., Huang, H. H., Lee, S. M. and Ouyang, K., “Numerical Simulation of the Heat Transfer Characteristics of Low-watt Thermosyphon Influence Factors,” Journal of Applied Science and Engineering, Vol. 17, No. 4, pp. 423428 (2014). doi: 10.6180/ jase.2014.17.4.09
  7. [7] Chen, T. Y. and Li, C. C., “Heat Transfer and Flow Characteristics in Impinging Flows with Turbulators,” Tamkang Journal of Science and Engineering, Vol. 10, No. 1, pp. 95101 (2007). doi: 10.6180/jase.2007.10. 1.11
  8. [8] Bird, G. A., Molecular Gas Dynamics and the Direct Simulation Monte Carlo of Gas Flows, Claresdon Press, Oxford, pp. 1-2 (1994).
  9. [9] Ren, W., Liu, H. and Jin, S., “An Asymptotic-preserving Monte Carlo Method for the Boltzmann Equation,” Journal of Computational Physics, Vol. 276, pp. 380 404 (2014). doi: 10.1016/j.jcp.2014.07.029
  10. [10] Zhang, B., Liu, H. and Jin, S., “An Asymptotic Preserving Monte Carlo Method for the Multispecies Boltzmann Equation,” Journal of Computational Physics, Vol. 305, pp. 575588 (2016). doi: 10.1016/j.jcp. 2015.11.006
  11. [11] Xiao, H. S., Zuo, B. J. and Fan, Z. G., “Joint Influences of Aerodynamic Flow Field and Aerodynamic Heating of the Dome on Imaging Quality Degradation of Airborne Optical Systems,” Applied Optics, Vol. 51, No. 36, pp. 86258636 (2012). doi: 10.1364/AO.51. 008625

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