Evaluation of Particle Image Velocimetry Measurement Using Multi-wavelength Illumination

International Conference on Aerospace and Mechanical Engineering 2017

航空航天工程;机械制造

Lai, H.C.^1 ; Chew, T.F.^1 ; Razak, N.A.^1

School of Aerospace Engineering, Engineering Campus, Universiti Sains Malaysia, Penang, Nibong Tebal

14300, Malaysia^1

关键词: High power light emitting diodes;    Illumination system;    Laser illumination;    Multi-wavelengths;    Particle image velocimetries;    Particle image velocimetry measurement;    PIV techniques;    Velocity vectors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/370/1/012044/pdf
DOI  :  10.1088/1757-899X/370/1/012044

学科分类：航空航天科学

来源: IOP

【 摘 要 】

In past decades, particle image velocimetry (PIV) has been widely used in measuring fluid flow and a lot of researches have been done to improve the PIV technique. Many researches are conducted on high power light emitting diode (HPLED) to replace the traditional laser illumination system in PIV. As an extended work to the research in PIV illumination system, two high power light emitting diodes (HPLED) with different wavelength are introduced as PIV illumination system. The objective of this research is using dual colours LED to directly replace laser as illumination system in order for a single frame to be captured by a normal camera instead of a high speed camera. Dual colours HPLEDs PIV are capable with single frame double pulses mode which able to plot the velocity vector of the particles after correlation. An illumination system is designed and fabricated and evaluated by measuring water flow in a small tank. The results indicates that HPLEDs promises a few advantages in terms of cost, safety and performance. It has a high potential to be develop into an alternative for PIV in the near future.