A calibration scheme for quantitative concentration measurements using simultaneous PIV and PLIF |
| |
Authors: | Partha Sarathi Roi Gurka Gregory A Kopp Paul J Sullivan |
| |
Institution: | (1) Faculty of Engineering, The University of Western Ontario, London, Ontario, Canada;(2) Faculty of Engineering, Ben-Gurion University, Beer-Sheva, Israel;(3) Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada |
| |
Abstract: | A new approach for calibration of planar laser-induced fluorescence (PLIF) measurements is presented. The calibration scheme
is based on the fact that there is a constant concentration flux through each cross-section of a fluorescent plume in a given
flow field and makes use of simultaneous measurements of particle image velocimetry (PIV) and PLIF. The following are the
advantages of the current technique: (1) it is experimentally less demanding and (2) it does not require in situ calibration
for generating the calibration curves. The technique can be implemented in many experimental setups (both in water and gaseous
flows) provided the geometry of the time-averaged scalar field is known. Using the calibration scheme, an analysis is carried
out on the measurements of concentration fields in grid turbulence to validate the proposed technique. To demonstrate the
feasibility of the scheme, the distributed second-order moments (μ
2), and concentration and velocity correlations (
á u¢c¢
ñ \left\langle {u^{\prime}c^{\prime}} \right\rangle and
á v¢c¢
ñ \left\langle {v^{\prime}c^{\prime}} \right\rangle ) are computed. Good agreement is found with previous studies. In addition, a quantitative appraisal of a simple closure approximation
of the moment-based transport equation is also presented using simultaneous PIV and PLIF. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|