高空飞艇增浮减阻技术研究

Research of Increasing Buoyancy and Reducing Drag Technique for High Altitude Airship

为了增加飞艇的体积效率,需要减小飞艇的长细比,但带来飞艇流场的分离问题,引起阻力的增加。发展了一种增加飞艇浮力、减小飞艇阻力的技术途径,即在飞艇中间增加一条通道,将飞艇前面驻点的高压流体通过管道从尾部流出,以便改善飞艇后体的分离程度,从而在增加飞艇浮力的同时,控制飞艇的阻力。通过运用黏性流场的计算分析,研究结果表明:所提出的技术途径在增加飞艇浮力的同时,可以有效地改善飞艇后体的分离,可以为飞艇设计提供一种新的思路。

In order to improve airship＇ s volume efficiency, its slender ratio has to reduce, but this will lead to the flow separation, which will increase airship＇ s drag. An increasing buoyancy and reducing drag technique are developed. It could improve the separation degree in the tail by high pressure flow in the front stagnation point to the after-body adding a tunnel inside the airship which leads the , therefore, the buoyancy is increased and the drag is reduced. Through numerical calculation and analysis of viscosity flow, the results indicate that this technique can increase buoyancy as well as improving the back separation efficiently.