TY - JOUR
TI - Experimental study of a water-mist jet issuing normal to a heated flat plate
AU - Vouros Andreas
AU - Vouros Alexandros
AU - Panidis Thrassos
JN - Thermal Science
PY - 2016
VL - 20
IS - 2
SP - 473
EP - 482
PT - Article
AB - A parametric experimental study on the development of a round jet spray  impacting a smooth, heated, flat plate has been accomplished. The main  objective of this effort was to provide information characterizing the flow  structure of a developing mist jet, issuing vertically towards an upward  facing, horizontal heated plate, by means of simultaneous droplet size and  velocity measurements. Phase Doppler Anemometry was used, providing also  information on liquid volume flux. The fine spray of small atomized droplets  (0.5-5.0 μm), was generated using a medical nebulizer. Two low Reynolds  number jets (Re=2952, 3773) issuing from a cylindrical pipe have been tested.  The distance between the jets’ exit and the plate was 50 cm. A stainless  steel non-magnetic flat plate of dimensions 1000x500x12mm3 was used as target  wall. Constant heat flux boundary conditions were established during  measurements. Results indicate that the heat flux from the plate is  influencing the evolution of the spray jet, diminishing its velocity and  turbulence. Average droplet sizes are affected little by the heat flux,  although for the non-heated sprays, droplet sizes increase at locations very  close to the plate. A significant effect on droplet volume flow rate is also  reported.