Combined DFD and Phosphor Thermometry for Synchronous Droplet Size, Position and Temperature Measurement
Y. Li(1,2), T. Cai(1,2), W. Zhou(1,2), C. Tropea(3)
1: School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China.
2: Shanghai Key Laboratory of Multiphase Flow and Heat Transfer for Power Engineering,Shanghai 200093,China.
3: Institute for Fluid Mechanics and Aerodynamics,Technical University of Darmstadt,Darmstadt,Germany.
DOI:
In sprays and droplet laden gas flows, the spatial, size and temperature distributions of the droplets usually play a fundamental role in process efficiency. Examples are spray drying, spray cooling, spray combustion or flue gas scrubbing. The goal of the present study is to combine the depth-from-defocus (DFD) technique for droplet size and position with phosphor thermometry for droplet temperature. Although both techniques are well-established, several possibilities arise for their combination into a single measurement instrument. In this study a solution with a single illumination source and a dual-camera, dual focal length solution is examined. Results confirm the feasibility of this approach.
