地效翼船气动仿真及横向静稳定性分析

Pneumatic Simulation and Analysis on Transverse Static Stability of WIG

针对地效翼船横向静稳定问题,利用FLUENT软件对处于地效区的地效翼船进行气动数值仿真。首先,在给定地效翼船展弦比下,对不同的相对飞行高度和攻角进行仿真;然后,在相同弦长下,对不同展弦比下的地效翼船进行仿真;计算出在不同的展弦比、相对飞行高度和攻角下的升力曲线;最后,通过计算分析地效飞行器横向静稳定性因素。研究结果表明,地效翼船在地效区飞行高度越低,其升力系数增长越快,同时,展弦比越大,升力系数相对飞行高度变化减缓。最后,基于地效翼船横向静稳定性因素,利用以上结论,讨论地效翼船的主翼设计特点。

The transverse static stability was the key concern for wing in ground （WIG）. The flow of WIG was simulated under the ground effect by using FLUENT software. Firstly, given an aspect ratio of the wing of the WIG, relative ground clearance and angle of attack with different value were simulated. Secondly, with the same chord length, the wing of the WIG with different aspect ratios was simulated. Then, the curves of lift in characteristics were provided for the WIG under ground effect with different aspect ratio, angel of attack and relative ground clearance. Finally, the transverse static stability factors were analyzed through calculation. The research result shows that WIG in the lower relative ground clearance under ground effect, the faster growth of its lift coefifcient, also the bigger of the aspect ratio of a wing, the slower mitigation of its lift coefifcient. At the end, based on the WIG ship transverse static stability factors, the design characteristic of the main wing of the WIG was discussed using the conclusions above.