科研之友
微信
新浪微博
Facebook
分享链接
摘要
In the early stages of aeroshell shape design, it is important to strike an appropriate balance between analysis fidelity and computational effort. Because the prediction of aerodynamic heating for axisymmetric flows is significantly faster than for three-dimensional flows, it is advantageous to employ an axisymmetric analysis method. The current work couples an equivalent axisymmetric body technique with different axisymmetric analysis methods, using a series of axisymmetric bodies to approximate the three-dimensional heating. Three levels of fidelity are considered: 1) a Newtonian inviscid solution coupled with an axisymmetric integral boundary layer approach, 2) an Euler solution coupled with an axisymmetric integral boundary-layer approach, and 3) a Navier Stokes solution applied to each equivalent axisymmetric body. Approximate solutions for three-dimensional flows were compared with high-fidelity computational and experimental data, establishing the accuracy for various levels of fidelity. The multi-fidelity analysis showed that significant decreases in computational times could be achieved, at the same time maintaining sufficient accuracy to perform shape optimization.
- 出版日期2013-8
