Particle-Based Measurements and Fluid Machinery Flows
Event details
| Date | 26.03.2014 |
| Hour | 14:00 › 15:00 |
| Speaker |
Dr Huixuan Wu, Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany Bio: Dr. Huixuan Wu studied at Johns Hopkins University, Baltimore, USA, from 2005 to 2011. He received his PhD from the Mechanical Engineering Department for his experimental studies of the complex vortical flow in the rotor tip region of a turbomachinery. Since November 2011, he has been a postdoctoral fellow at Max Planck Institute for Dynamics and Self-Organization, Göttingen, Germany. He received an Alexander von Humboldt Scholarship in February 2013. His current project is simultaneous measurements of velocity and vorticity in complex flows. Dr. Wu is also interested in particle dynamics, thermodynamics, heat transfer, and applied optics. |
| Location | |
| Category | Conferences - Seminars |
Abstract : Particle-based flow diagnostic technologies are essential in obtaining quantitative measurements of three-dimensional flow fields, which provide insights into many complex flow problems. As an example, I will present our particle image velocimetry (PIV) study of the rotor tip flow in a turbomachine. Turbomachinery tip flow is tightly linked to efficiency loss, structure vibration, and even failure of the machine, but this flow is notoriously complex because it is inherently a multi-scale problem with moving boundaries. In our experiments, we obtained the fully resolved tip flow fields, which clarified the dynamics of the tip leakage, the interactions among flow structures, and the production of turbulence. These results also shed light on the mechanism of stall inception. Besides applications of PIV, I will introduce an innovative experimental technique: Direct Vorticity Probing, which measures vorticity by detecting the spin of micro-sized, mirror-encapsulated particles. The high spatial resolution of this approach makes it superb in vorticity measurement compared to conventional indirect methods. I will also discuss the potential applications of this innovative technology in turbomachinery flows, as well as in other vortical flows.
Practical information
- General public
- Free
Organizer
- IGM-GE
Contact
- Géraldine Palaj