IMECH-IR  > 高温气体动力学国家重点实验室
Shape design to minimize the peak heat-flux of blunt leading-edge
Cui K(崔凯); Hu SC(胡守超); Cui K(崔凯)
Source Publication51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
Conference Name51st AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition 2013
Conference DateJAN 07-10, 2013
Conference PlaceGrapevine, TX, United states
AbstractTo minimize the peak heat-flux of hypersonic blunt leading-edge, the Mini-Max optimization model is introduced for the first time for aerothermodynamics optimization. The surface heat-flux is obtained by resolving Navier-Stokes equations, and only the frozen flow is considered. The computational fluid dynamics (CFD) based Genetic Algorithm is used as the optimizer. A novel 2-D profile of leading-edge is obtained and the peak heat-flux is significantly reduced. Compared to the commonly used circular leading-edge, there is a large area of high temperature, high pressure in the front part of leading-edge, together with greater shock stand-off distance. The thickness of thermal boundary layer is increased about 40% at the stagnation point, the peak heat-flux is decreased about 20% and the heat-flux distribution is little changed in the vicinity of stagnation point. The robustness analysis shows that the favorable performance of the optimal 2-D profile is universally effective, i.e., it can effectively decrease the peak heat-flux by about 20% for various wall temperatures, Mach numbers, flight altitudes and thicknesses of the leading-edge as compared with the corresponding case of circular leading-edge. Although the reduction scope of peak heat-flux decreases with the change of angle-of-attack, but the peak heat-flux can still be decreased by more than 4% when the angle-of-attack is not greater than 15°. Several axisymmetric cases are also investigated in this paper, and the circular cone is taken as the benchmark, the peak heat-flux around an axisymmetric blunt cone, which is generated by the corresponding optimal 2-D profile, is also reduced by about 25%. Similarly, the distribution of heat-flux around the stagnation point is almost unchanged.
Funding OrganizationAmerican Institute for Aeronautics and Astronautics (AIAA)
Indexed ByEI
Document Type会议论文
Corresponding AuthorCui K(崔凯)
Recommended Citation
GB/T 7714
Cui K,Hu SC,Cui K. Shape design to minimize the peak heat-flux of blunt leading-edge[C]:AMER INST AERONAUT ASTRONAUT, RESTON,2013.
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