Heat transfer in high velocity gas-droplet jet and surface interaction at boiling

Аuthors

Karpyshev A. V.^*, Firsov V. P., Antyukhov I. V.^*, Gorelov A. A.

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: cryogen204@mail.ru

Abstract

This paper represents the result of experimental heat exchange study at high velocity gas-droplet jet and hot surface interaction. The tests were conducted at water-and-air finely dispersed jet and copper calorimeter interaction. Droplet velocity in a stream varied 25 through 90 m/s and jet aperture angle varied 0 through 90°. It was found that a maximum heat flow value depending on jet velocity varied 5 through 8 MWt/m2. A surface cooling rate is more than 5-fold higher than a cooling rate in a great volume. At jet flowing onto the surface angle variation from 0 to 90° the density of a heat flow increases from 1.75 to 8 MWt/m2.

Keywords:

gas-droplet jets; heat transfer; boiling.