Thermal Structures

Thermal-structural analysis and design has been a key issue in advanced aeronautics and astronautics projects that involve elevated temperatures and extreme environments. For example, in a hypersonic propulsion system, the scramjet should meet "light weight", "thermal protection" and "thermal strength/stiffness" requirements, which call for new challenge to the structural design. The group focuses on research fields including:

  • (i) coupling effects and thermal-fluid-structure interaction in high-speed flights and propulsion systems;
  • (ii) cellular sandwich structures, light-weight structures and multi-functional design;
  • (iii) high temperature materials and structures;
  • (vi) structural integrity at extremely severe and high temperature environments;
  • (v) thermal effects, shock effects and failure mechanisms when high power laser interaction with matter.

The group is finically supported by Major National Science & Technology Project, National 863 Project, National NSF of China, Major Science & Technology Project of CAS, Instrument Project of CAS, etc.

Major Progress:

(1)  Coupled thermal-fluid-structure analysis and design of novel light-weight active cooling structures

Figure 1. Design I: Lattice-framed materials (LFMs) sandwich panels as active cooling channel

Figure 2. Design II: LFMs reinforced active cooling panel

(2)  Manufacturing of light-weight LFM panels

Figure 3. Manufacturing of LFMs sandwiches and reinforced active cooling panels

(3)  Thermal-mechanical tests on LFMs sandwiches

Figure 4. 3-points bending test of LFM structure

Figure 5. Deformation morphology of pores versus strain

Figure 6. Thermal-buckling test of LFM panel, with 3D DIC measurement, high temperature strain gauges and thermal couple gauges

(4)   Laser interactive with flying targets

Figure 7. Thermal structural response of a supersonic flying target irradiated with high power laser

Figure 8. Numerical modeling of the laser ablation and morphology evolution, with 2s intervals.