Digital design software scheme of the geometry character is set up, and automatic calculation and output of the geometry character of the twin - helical rotors is implemented.
构造了双螺旋转子几何特性数字化设计软件方案，实现了双螺旋转子几何特性的自动计算与输出。
2
Through studies on the digital design methodology and technology of the twin-helical rotors, the design quality, level and efficiency of the helical rotors can be greatly improved.
开展双螺旋转子数字化设计方法与技术的研究，有助于大幅度提升螺旋转子的设计质量、水平和效率。
3
A computational method based on rotor free-wake is developed for predictig flow field between the twinrotors of coaxial helicopters.