中文摘要：

直接进行基于三维流场求解的飞艇气动优化会受到当前计算资源的限制，将飞艇三维气动性能优化问题简化为二维的气动性能优化问题，分别对比了二维平面与二维轴对称优化前后飞艇的形状和三维气动性能．结果表明，虽然两种二维流场的压差阻力所占比例完全不同，但优化后飞艇的三维气动性能都有不同程度的改善．基于二维轴对称流场的飞艇气动性能优化对飞艇的气动优化更加合理而有效，而基于二维平面流场的飞艇气动性能优化同样可以改善飞艇的气动性能．

英文摘要：

Aerodynamic optimization of airships based on 3D flow fields is still too computation intensive for the nowadays computation resources and efficiency. In the present work, two-dimensional aerodynamic optimizations based on solving 2D planar and axisymmetric flows were conducted to minimize aerodynamic drag of airships. It was shown that the 3D aerodynamic performance is improved by optimizations based on both 2D planar and axisymmetric flows, although form drag percentage was found to be drastically different in the cases. Optimization based on 2D axisymmetric flow was found to be more reasonable and effective for minimize the aerodynamic drag of airships, while optimization based on 2D planar flow is also feasible to reduce aerodynamic drag of airships.