新型排翼式浮升一体化飞艇的布局设计和气动研究

以传统的NACA系列翼型为基准,设计一类实用高效的新型排翼式浮升一体化飞艇.通过数值计算,对浮升一体化飞艇的气动问题和布局设计展开系统的研究,综合分析和评估各气动布局形式的浮升特性.研究结果表明:排翼式浮升一体化飞艇不仅具有接近常规飞艇的体积效率,而且利用后翼对前翼下表面气流形成的阻滞和排翼重叠区域之间的气流加速作用,其总体升阻比较单排翼增大50%以上,当速度大于30 m·s^-1之后可以使飞艇的自重降低,有效载荷提高;同时,排翼式飞艇的弦向尺寸较小,可有效降低材料的表面张力,为高空飞艇表面柔性材料提供了较宽的选择范围.

Configuration Design and Aerodynamic Research of New Type Tandem Buoyancy-Lifting Airships

Based on NACA airfoils,a new type of tandem buoyancy-lifting airships with both higher utility and economy efficiency was developed.With numerical simulations aerodynamic and configuration design for buoyancy-lifting airships was investigated and buoyancy-lifting characteristics were evaluated and analyzed synthetically.It shows that a tandem buoyancy-lifting airship has considerable volume efficiency.Its lift-drag ratio is increased 50% than single wing resulted from block of airflow by posterior flying-wing and speedup of airflow in overlay field.Its deadweight can be decreased and payload is increased as velocity is higher than 30 m·s^-1.At the same time,chord wise size of tandem airship is comparatively small so that surface tension of skin material can be reduced availably.It provides a wider scope for skin flexible material selection of high altitude aircrafts.