钝化外形对旋成体气动性能的影响

Effect of blunt shapes on aerodynamic performance of bodies of revolution

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.

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.