摘要
结合热线测量的一般方法及周期性采样平均技术 ,推导出旋转单丝斜探头测量叶轮机出口周期性三维流场的方法 ,借助于Matlab的程序实现非线性L -M最小二乘法求解三维速度平均量。采用上述方法成功测量了T3 5轴流通风机出口周期性三维流场。
In order to measure three dimension flow field behind a impeller, the system integrating common method of hot wire measurement with a periodic multi sampling measuring technique is developed which consists of a rotating slanted hot wire. The procedure for solving the mean velocity vector involving the least squares technique can be accomplished via the program of Matlab. With above method, three components of the mean velocity can be determined more accurately than with the conventional methods. Typical experiment results are presented for a measurement of a flow field immediately behind an axial flow impeller type of T35 to show the availability of this measuring system.
出处
《流体机械》
CSCD
2003年第7期25-28,共4页
Fluid Machinery
关键词
单斜丝热线
叶轮机械
三维流场测量
slanted hot wire
turbine machinery
three dimension flow field
measurement
