Planar particle imaging Doppler velocimetry: a hybrid PIV/DGV technique for three-component velocity measurements
Planar particle imaging Doppler velocimetry: a hybrid PIV/DGV technique for three-component velocity measurements
复制标题
平面粒子成像多普勒测速：用于三分量速度测量的混合 PIV/DGV 技术
DOI：
10.1088/0957-0233/15/10/011
复制
发表时间：
2004
影响因子：
2.4
通讯作者：
M. Wernet
中科院分区：
文献类型：
--
作者：
M. Wernet
数字粒子成像测速技术（DPIV）是一种高分辨率、高精度的平面测速技术，可为航空发动机试验设备提供有价值的瞬时速度信息。DPIV能够使用双摄像机、立体观察配置提供三分量流场测量。多普勒全局测速（DGV）是另一种平面测速技术，也能够提供三分量流场测量，但需要三个检测器系统，这些系统必须位于与测量平面成斜角的位置。这两种技术的三维（3D）配置都需要在进行测量的设施中设置多个（DGV）或至少大型（立体PIV）光学接入端口。在一些测试设施中，只有有限的光学接入可用（单个观察窗口或小的光学接入端口），这禁止实施用于三组分流测量的技术。描述了一种混合测量技术，称为平面粒子图像多普勒测速（PPIDV），它将DPIV和DGV技术的元素结合到一个单一的检测系统中。所得到的系统是能够测量所有三个组件的速度通过一个单一的光学访问端口的流场的平面区域。进行误差分析，揭示了测量系统的DGV部分的最佳配置。旋转轮的测量用于验证该技术的完整性。然后，同时测量的喷嘴流量获得使用的立体观察DPIV系统和PPIDV系统。
Digital particle imaging velocimetry (DPIV) is a high resolution, high accuracy, planar velocimetry technique, which provides valuable instantaneous velocity information in aeropropulsion test facilities. DPIV is capable of providing three-component flow field measurements using a two-camera, stereo viewing configuration. Doppler global velocimetry (DGV) is another planar velocimetry technique which is also capable of providing three-component flow field measurements, but requires three detector systems that must be located at oblique angles from the measurement plane. The three-dimensional (3D) configurations of either technique require multiple (DGV) or at least large (stereo PIV) optical access ports in the facility in which the measurements are being conducted. In some test facilities, only limited optical access is available (either a single viewing window or small optical access port), which prohibits the implementation of either technique for three-component flow measurements. A hybrid measurement technique is described, called planar particle image Doppler velocimetry (PPIDV), which combines elements from both the DPIV and DGV techniques into a single detection system. The resulting system is capable of measuring all three components of velocity across a planar region of a flow field through a single optical access port. An error analysis is performed which reveals an optimal configuration for the DGV portion of the measurement system. Measurements of a rotating wheel are used to verify the integrity of the technique. Then simultaneous measurements of a nozzle flow are obtained using both a stereo viewing DPIV system and the PPIDV system.