Volume 45 Issue 7
Aug.  2016
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Luo Haibo, Zhang Daijun, Hui Bin, Chang Zheng, Xu Baoshu. Numerical calculation of turbulent convection heat transfer over infrared dome based on SST turbulence model[J]. Infrared and Laser Engineering, 2016, 45(7): 703002-0703002(9).
Citation: Luo Haibo, Zhang Daijun, Hui Bin, Chang Zheng, Xu Baoshu. Numerical calculation of turbulent convection heat transfer over infrared dome based on SST turbulence model[J]. Infrared and Laser Engineering, 2016, 45(7): 703002-0703002(9).
shu

Numerical calculation of turbulent convection heat transfer over infrared dome based on SST turbulence model

  • 1.

    Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;

  • 2.

    University of Chinese Academy of Sciences,Beijing 100049,China;

  • 3.

    Key Laboratory of Opto-Electronic Information Processing,Chinese Academy of Sciences,Shenyang 110016,China;

  • 4.

    Key Lab of Image Understanding and Computer Vision,Shenyang 110016,China

  • Received Date: 2015-11-05
  • Rev Recd Date: 2015-12-03
  • Publish Date: 2016-07-25
  • Spherical dome usually works in the state of turbulent convection heat transfer for the penetration infrared guidance system flying at low altitude and high speed. In this paper, the sphere-cone at zero attack corner was focused on. Numerical calculation engineering method of turbulent convection heat transfer for dome was proposed by using SST model, which was implemented by generating the structure grid, setting physical property parameter of inflow and compared with the engineering formula of heat transfer at stagnation point and turbulent region. Firstly, based on Billig's results, detached shock was generated in flow field by use of multi-block structured grid in order to reduce the numerical dissipation. In order to analyze the sensitivity of the calculation results to near-wall grid, several numerical experiments were performed with grid of different near-wall node heights. Then, the influence of SST model parameters on the calculation results was analyzed and Bradshaw number only had an obvious impact on the computation of peak heat flux. The result of heat flux at stagnation point calculated by SST model was consistent with Klein's formula by using the correction approach of equivalent thermal conductivity for inflow. At the region of turbulent flow over dome, the Bradshaw number was modified by applying the engineering formula of turbulent heat transfer over the sphere at high speed. The result of heat flux computed by SST model was consistent with this engineering formula. The results calculated by modified SST model could satisfy the requirement of engineering applications and could be applied to analyze thermal shock resistance of dome, aero-optic effects, non-uniformity correction of infrared images and trajectory design of terminal guidance for infrared or laser guidance system. This numerical calculation method plays an important role in engineering design of optical guidance system at high speed.
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Numerical calculation of turbulent convection heat transfer over infrared dome based on SST turbulence model

  • 1. Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;
  • 2. University of Chinese Academy of Sciences,Beijing 100049,China;
  • 3. Key Laboratory of Opto-Electronic Information Processing,Chinese Academy of Sciences,Shenyang 110016,China;
  • 4. Key Lab of Image Understanding and Computer Vision,Shenyang 110016,China
  • Received Date: 2015-11-05
  • Rev Recd Date: 2015-12-03
  • Publish Date: 2016-07-25

Abstract: Spherical dome usually works in the state of turbulent convection heat transfer for the penetration infrared guidance system flying at low altitude and high speed. In this paper, the sphere-cone at zero attack corner was focused on. Numerical calculation engineering method of turbulent convection heat transfer for dome was proposed by using SST model, which was implemented by generating the structure grid, setting physical property parameter of inflow and compared with the engineering formula of heat transfer at stagnation point and turbulent region. Firstly, based on Billig's results, detached shock was generated in flow field by use of multi-block structured grid in order to reduce the numerical dissipation. In order to analyze the sensitivity of the calculation results to near-wall grid, several numerical experiments were performed with grid of different near-wall node heights. Then, the influence of SST model parameters on the calculation results was analyzed and Bradshaw number only had an obvious impact on the computation of peak heat flux. The result of heat flux at stagnation point calculated by SST model was consistent with Klein's formula by using the correction approach of equivalent thermal conductivity for inflow. At the region of turbulent flow over dome, the Bradshaw number was modified by applying the engineering formula of turbulent heat transfer over the sphere at high speed. The result of heat flux computed by SST model was consistent with this engineering formula. The results calculated by modified SST model could satisfy the requirement of engineering applications and could be applied to analyze thermal shock resistance of dome, aero-optic effects, non-uniformity correction of infrared images and trajectory design of terminal guidance for infrared or laser guidance system. This numerical calculation method plays an important role in engineering design of optical guidance system at high speed.

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