单斜热丝测量三维速度场算法研究  

Algorithm Study of Measuring Three-Dimensional Velocity by Using Single-Inclined Hot-Wire

作　　者：钟明[1] 陈洪敏[1] 熊兵[1] 田伟 吉建波 

机构地区：[1]中国燃气涡轮研究院,四川江油621703 [2]柴油机高增压技术国防科技重点试验室,山西大同037036

出　　处：《燃气涡轮试验与研究》2012年第4期51-54,共4页Gas Turbine Experiment and Research

基　　金：国防科技重点实验室基金(9140C3310081004)

摘　　要：单斜热丝技术测量三维速度场的精度,取决于能否在较大速度和角度范围内,准确有效地反映有效速度与气流大小和方向的关系。在分析最小二乘、L-M算法拟合测量数据不足的基础上,采用粒子群优化算法求解测量数据,有效解决了热线旋转角度不确定性问题,避免了实际测量计算时重新引入热线方向性误差。同时,通过动态调整惯性权重因子及引入变异因子,克服了传统粒子群算法易陷入局部极值的缺点。本文发展的单斜热丝测量三维速度场的试验数据确定方法,经压气机转子出口流场测试试验表明,该算法精度较高。The precision of single-inclined hot-wire measuring three-dimensional velocity depends on the algorithm which can reflect the relationship between effective velocity with orientation and flow rate of air- flow. Particle swarm optimization algorithm was performed to solve non-linearity least square problem based on analyzing the defects of least square method and L-M algorithm, through adjusting inertia and mu- tation factor to overcome the defects of traditional particle swarm optimization algorithm. The method of measuring three-dimensional velocity by using single-inclined hot-wire was developed and the compressor rotor outlet flowfield test has proved its relatively high accuracy.

关 键 词：热线风速仪 单斜热丝 粒子群算法 三维速度测量 

分 类 号：V211.73[航空宇航科学与技术—航空宇航推进理论与工程]