Experiences of turbulence measurement with PIV
Experiences of turbulence measurement with PIV
复制标题
PIV湍流测量经验
DOI：
10.1088/0957-0233/12/11/320
复制
发表时间：
2001
影响因子：
2.4
通讯作者：
H. Eloranta
中科院分区：
文献类型：
--
作者：
P. Saarenrinne;M. Piirto;H. Eloranta
介绍了粒子图像测速技术在湍流测量中的应用。利用模型谱函数分析了物理上必要的空间分辨率。并与热线风速法进行了比较。给出了空间滤波和二维采样的一些方面，并与大涡模拟进行了比较。以实验室混合器中测量的矢量场估计时间平均湍流量为例。在不同的询问区域大小下，比较了两种不同图像尺寸在流场相同位置的测量结果。速度场与询问区域大小的假设关系不能得到证实。图像的大小似乎在所有估计量中都产生依赖关系。测量误差是实现测量结果的关键。
The application of particle image velocimetry to turbulence measurement is described. An analysis of physically necessary spatial resolution is presented by using a model spectrum function. A comparison is made with hot-wire anemometry. Some aspects of spatial filtering and two-dimensional sampling are presented with a comparison to large-eddy simulation. The estimation of time mean turbulence quantities from the measured vector fields in a laboratory mixer is used as an example. The measurement results for two different image sizes at the same position in the flow field are compared with different interrogation area sizes. The assumed dependence of the velocity field on the interrogation area size could not be confirmed. The image size seems to produce dependence in all estimated quantities. The measurement errors are critical for the achieved results.