钝化外形对旋成体气动性能的影响

为考察钝化外形对高超声速飞行器气动性能的影响,基于CFD分析,针对典型旋成体比较2种不同钝化外形(钝化半径均匀/非均匀)的气动性能.结果表明:在较小的钝化半径/高度下,由于前缘流向投影面积占整个旋成体流向投影面积比例较小,前缘气动性能对整个旋成体气动性能影响不大;但是,随着钝化半径/高度的增加,前缘气动性能对整个旋成体气动性能影响会逐渐增大.

Effect of blunt shapes on aerodynamic performance of bodies of revolution

To study the effect of blunt shapes on the aerodynamic performance of hypersonic aircraft, based on CFD analysis, the aerodynamic performance of two different blunt shapes(the blunt radius are uniform or non uniform) are compared for typical bodies of revolution. The results show that, under the smaller blunt radius/height, because the projection area in flow direction of leading edge accounts for a small proportion of the projection area in flow direction of whole bodies of revolution, the leading edge aerodynamic performance has a little effect on the aerodynamic performance of the whole bodies of revolution; however, with the increase of blunt radius/height, the effect of leading edge aerodynamic performance on the aerodynamic performance of whole bodies of revolution increases gradually.