卷弧翼身组合体的自滚转特性

Self-Rolling Characteristics of Wrap Around Fin-Body Combinations

介绍了卷弧翼身组合体自滚转特性的风洞试验研究.给出了测力试验和测压试验结果.测力试验结果表明,卷弧翼弹型存在自诱导滚转力矩.测压试验结果表明,卷弧翼弹型自诱导滚转力矩产生的原因在于,卷弧翼凹凸两面的压力不等,形成自诱导法向力.在同样相对厚度下,变厚度卷弧翼的载荷分布与等厚度卷弧翼的载荷分布相差很小,气动设计时可以不考虑厚度变化的影响。

Introduces wind tunnel test results for the self-rolling characteristics of wrap around fin-body combinations. They include the results of measurement for the aerodynamic force and the pressure distribution. The results on aerodynamic force demonstrated that the wrap around fin (WAF) configuration exhibits a self-induced rolling moment. The results on pressure distribution demonstrated that the causes of the self-induced rolling moment for WAF configuration result from the self-induced normal force that depends on the unequal pressure distribution over both sides of the fin. Results on the measured pressure also indicated that the difference between the load distribution of the equal thickness WAF and that of unequal thickness WAF was small, if the relative thickness is same. Consequently the influence of variation in thickness on the aerodynamic characteristics may be neglected.