中法核工程与技术学院第97期学术午餐会

中法核工程与技术学院第97期学术午餐会

97^th Academic Lunch Seminar of Sino-French Institute of Nuclear Engineering and Technology

Topic: Tomographic Particle Image Velocimetry and Its Application

Speaker: Dr. Chengyue WANG

Time: 12:40 – 14:00, Friday November 30, 2018

Venue: F309 in the teaching building, Zhuhai Campus, SYSU

Organizer: Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University

Language: English

Abstract:

Tomographic particle image velocimetry (TPIV) is an advanced flow visualization technique, which could capture all the velocity components inside a measurement volume (3D-3C). This talk would begin by introducing the basic principles of TPIV technique including the 3D calibration, the tomographic reconstruction, the volume cross-correlation, etc. Subsequently, the post-processing techniques for TPIV velocity fields are introduced. These post-processing techniques are based on an optimization model, which introduce the continuity equation as a physical constrain. Weighted divergence correction scheme (WDCS) and its robust version termed as divergence-free smoothing (DFS) would be discussed in detail. At last, this talk would turn to the application of TPIV in the measurement of vortex breakdown over a delta wing. To combine the advantages of the dye visualization and TPIV technique, the two measurements were conducted simultaneously. Results consistently revealed the transformation between the bubble-type breakdown and the spiral-type breakdown.

About the speaker:

Dr. Chengyue WANG, a postdoctoral fellow of IFCEN, received his Ph.D. degree from the school of Aeronautics Science and Engineering, Beihang University. His research interest is focused on advanced flow visualization techniques and application.