Doppler Picture Velocimetry (DPV) applied to hypersonics
Doppler Picture Velocimetry (DPV) applied to hypersonics
复制标题
多普勒图像测速（DPV）在高超音速领域的应用
DOI：
10.1007/978-3-540-85168-4_80
复制
发表时间：
2009
影响因子：
2.4
通讯作者：
M. Havermann
中科院分区：
文献类型：
--
作者：
A. Pichler;A. George;F. Seiler;J. Srulijes;M. Havermann
ISL设计的特殊广视场迈克尔逊干涉仪将示踪剂粒子穿过光片时散射的光的多普勒频移转换为迈克尔逊干涉仪输出处的光度漂移，从而提供有关光片平面内粒子速度的信息。为了克服以往多普勒图像测速仪(DPV)的缺点，对其光学设置和多普勒图像处理算法进行了较大的改进。新的DPV算法现在允许根据多普勒图像自动计算速度剖面，而无需像过去那样由用户手动跟踪条纹。通过在ISL激波风洞上进行的实验，说明了DPV的工作原理和新的分析算法。在马赫数为6的流动中，测量了楔形模型和球形模型的垂直速度。在相同的流动条件下，通过与粒子图像测速仪(PIV)的比较，验证了计算结果的正确性。
The special wide-field Michelson interferometer designed at ISL transforms the Doppler frequency shift of light scattered by tracer particles crossing a light sheet into a shift of luminosity at the output of the Michelson interferometer, giving information on the particle velocity in the light sheet plane. To overcome former disadvantages of the Doppler Picture Velocimetry (DPV) the optical set-up as well as the Doppler picture processing algorithm were greatly improved. The new DPV algorithm now allows an automated calculation of the velocity profiles from the Doppler pictures without manual fringe tracing by the user as done in the past. The working principle of DPV and the new analysis algorithm are explained by means of experiments done at the ISL shock-tunnel facilities. The vertical velocity around a wedge and a sphere model in a Mach 6 flow has been measured. The results have been validated by comparison with Particle Image Velocimetry (PIV) at the same flow conditions.