旋成体在无侧滑大攻角下的横向气动力特性

THE TRANSVERSE AERODYNAMIC CHARACTERISTICS OF SLENDER BODY OF REVOLUTION AT HIGH ANGLES OF ATTACK WITHOUT SIDESLIP

介绍具有尖锥头部细长旋成体（以下简称弹体）在无侧滑下横向气动力随攻角变化特性，其中包括尖锥头部顶角、旋成体长细比、初始滚转角、试验雷诺数诸参数对横向气动特性的影响。还介绍美国ＮＡＳＡ的一篇综合研究报告的部分结果。试验结果表明，在低亚音速下，弹体气动特性对上述诸参数反应极为敏感，有时呈现随机特性。头部加边条、减小长细比或在后体装尾翼，将有助于减弱横向气动力。采用弹体旋转飞行技术，虽然产生Ｍａｇｎｕｓ侧向力，但有效地克服了气动力的随机性。

This paper introduces the characteristics of transverse aerodynamic forces and moments changing at different angles of attack, which act on the slender body of revolution with a conical nose(Abbreviation: body of shell) in the condition of no side slipping. Some parameters having influence on the transverse aerodynamic characteristics are also introduced, such as conical nose, cone apex angle, slenderness ratio, starting roll angle, and testing Reynolds number. And some results of a NASA comprehensive research report are offered. Testing results show that at low subsonic speed the aerodynamic characteristics of body have sensitive reactions to those parameters, sometimes with random properties. It will help to cut down the transverse forces and moments by mounting strakes on the nose, slowing the slenderness ratio and having tails on the back of body. Although producing the Magnus side force, it can get over the random properties effectively using body revolving techniques.