摘要
为提高轻型无人机推进系统的驱动能力和效率,实现螺旋桨与发动机整体系统优化,采用试验方法测量不同风速下螺旋桨推力、驱动功率等以研究风速对螺旋桨性能的影响程度。同时,将发动机外特性曲线与螺旋桨特性耦合,以此评估推进系统推力极限以及在部分负荷条件下驱动力-风速-油耗等综合性能。研究表明,风速对低空轻型无人机螺旋桨推力具有明显的影响,在一定的风速环境中螺旋桨所能达到的最大推力可利用发动机外特性与螺旋桨特性的功率平衡法进行估算。此外,在部分负荷工况下螺旋桨驱动力与发动机燃油消耗可利用发动机万有特性进行估算和寻优匹配。所述方法可用于无人机发动机与螺旋桨的优化匹配。
In order to improve propelling capability and efficiency of light UAV propulsion system and to realize optimization targets, firstly this paper measured propellers＇ driving force and power consumption at different wind speed conditions to demonstrate those influences. Then engine speed characteristic curve coupling evaluation methods were developed to forecast propelling top speed and performance under partial load conditions. It was found that wind speed has obviously effects on propeller performance. In the environment of a certain wind speed, the maximum propelling force could be estimated based on power balance between engine and propeller. In addition, in case of partial load, propelling force and engine fuel consumption could be estimated via universal engine characteristics. Those methods were believed can be used for UAV engines and propellers＇ matching.
出处
《航天制造技术》
2016年第3期1-4,9,共5页
Aerospace Manufacturing Technology
关键词
无人机
推进系统
发动机
螺旋桨
匹配
unmanned aerialvehicle
propulsion system
engine
propeller
matching
