On projectiles of minimum wave drag
On projectiles of minimum wave drag
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关于最小波阻抛射体
DOI：
10.1090/qam/20394
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发表时间：
1947
影响因子：
0.8
通讯作者：
W. Sears
中科院分区：
文献类型：
--
作者：
W. Sears
1.导论.在对称超音速流中细长旋成体的波阻是由von Karmdn，1通过奇点沿着射弹轴线的分布近似计算的。单个奇点的特征在于形式为r）={（x-e，-）2-a2 r2}-1 '2的势，其中x、r是圆柱坐标，x从射弹的头部下游测量，r从轴线径向测量，e，-是对应于奇点的x的值，a是未扰动流的马赫角的余切，使得a= V（U/ay-1，
1. Introduction. The wave resistance of slender bodies of revolution in symmetrical supersonic flow was calculated approximately by von Karmdn, 1 by means of a distribution of singularities along the axis of the projectile. The individual singularity is characterized by a potential of the form r)={(x—£,-) 2—a2r2}-1'2, where x, r are cylindrical coordinates, x being measured downstream from the nose of the projectile and r radially from the axis,£,• is the value of x corresponding to the singularity, a is the cotangent of the Mach angle of the undisturbed flow, so that a= V (U/ay-1,