带辅助安定面平流层飞艇的航向静稳定性分析

为增强平流层飞艇航向静稳定性，在不显著增加飞艇重量前提下，提出一种带辅助安定面的飞艇气动布局。建立飞艇计算模型，数值模拟飞艇在不同侧滑角、俯仰角下航向静稳定性及气动阻力特性，并与未集成辅助安定面的飞艇进行对比，最后分析辅助安定面面积对航向静稳定性的影响。结果表明：带辅助安定面的飞艇气动布局具有较好的航向静稳定性。相同条件下，随着侧滑角增大能够更快地达到航向稳定；在30°侧滑角，辅助安定面与尾翼面积比值大于0.05时，偏航力矩系数由无辅助安定时-0.8增加为正；辅助安定面面积越大，偏航恢复力矩越大，航向静稳定性越好。

Directional Static Stability Analysis of an Airship with Auxiliary Stabilizer

In order to enhance the directional static stability of the stratospheric airships, a new airship configuration with auxiliary stabilizers and without remarkably increasing the weight of the airships is proposed. To simulate the directional static stability and aerodynamic drag characteristics of an airship compared with an airship without auxiliary stabilizers under different side-slip and pitch angles, a numerical simulation model is established. Finally, the effects of the auxiliary stabilizer area on the directional static stability are analyzed. The results show that the airship configuration based on the auxiliary stabilizers exhibits a better directional static stability. Under the same conditions, the airship with auxiliary stabilizers can be stabilized faster with the increase of the side-slip angles; When the area ratio between the stabilizers and fins is greater than 0.05, at the side-slip angle of 30° the yaw moment coefficient increases from about -0.8 to positive. From the effects of the auxiliary stabilizer area, we can come to a conclusion that the larger the area is, the bigger the yaw restoring moment and the better the stability is.