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Investigation of the Cooling of Hot Walls by Liquid Water Sprays by Michele Ciofalo; Ivan Di Piazza; Valerio Brucato is a Engineering article available to read on EtoBox.

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An experimental study was conducted for the heat transfer from hot walls to liquid water sprays[ Four full cone\ swirl spray nozzles were used at di}erent upstream pressures\ giving mass ~uxes impinging on the wall\ G\ from 7 to 79 kg m -1 s -0 \ mean droplet velocities\ U\ from 02 to 17 m s -0 and mean droplet diameters\ D\ from 9[3 to 1[1 mm[ A target consisting of two slabs of berylliumÐcopper alloy\ each 3×4 cm in size and 0[0 mm thick\ was electrically heated to about 299>C and then rapidly and symmetrically cooled by water sprays issuing from two identical nozzles[ The midplane temperature was measured by a fast response\ thin!foil thermocouple and the experimental data were regularized by Gaussian \_ltering[ The inverse heat conduction problem was then solved by an approximation of the exact Stefan solution to yield the wall temperature T w and the heat ~ux q w transferred to the spray at temperature T f [ As a result\ cooling curves expressing the heat ~ux q w as a function of T w -T f were obtained[ The single!phase heat transfer coe.cient h and the maximum heat ~ux q c were found to depend upon the mass ~ux G and the droplet velocity U\ while the droplet size D had a negl

Who reads Investigation of the Cooling of Hot Walls by Liquid Water Sprays?

Author

Michele Ciofalo; Ivan Di Piazza; Valerio Brucato

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0017-9310)

Published

1999

Language

EN

Field

Engineering (Physical Sciences)