先进的小发动机涡轮的流量小，叶片短，展弦比低，二次损失及叶尖漏泄损失大，效率低，温度高冷效差。
The advanced small gasturbines feature small mass flow ratio, short vanes and blades with low aspect, high second flow and blade tip leakage losses, and low efficiency.
采用多流管模型分析了H型垂直风力机展弦比和实度对其功率系数的影响，并对叶片旋转过程中攻角随尖速比的变化进行了分析。
The influence of solidity and aspect ratio on power coefficient of H-type vertical axis wind turbine, and the change of attack Angle with tip speed ratio were analyzed.
在原直叶片与三维风扇叶片的基础上，通过编程设计手段改变其设计参数，使得叶片的展弦比，最大相对厚度与稠度等参数发生改变。
Based on the straight cascade and the fan cascade, the design parameter of aspect ratio, maximum relative thickness and solidity were remodeled by programmed design method.
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