Two-phase mist-flow cooling in a tube with a high wall temperature
- Ship Research Inst. (JP)
This paper reports that in order to apply a large heat capacity of two-phase mist flow to obtain a uniform and gentle cooling of high-temperature surfaces, the effects of mass flow rate, mass flow quality, liquid droplet diameter, and wall heat flux on the rate of increase of fluid temperature in a tube were numerically investigated. The results indicate that a newly defined coefficient of temperature increase is low for droplet diameters less than 200 microns and for low inlet quality. A simple expression between the coefficient and the above parameters, including the effect of temperature dependence of fluid properties, was obtained for the thermally free developed region of the tube. The initial values of gas temperature and relative velocity between the droplet and the gas phase influence the coefficient primarily in the entrance region of the tube.
- OSTI ID:
- 5116421
- Journal Information:
- Heat Transfer - Japanese Research; (United States), Vol. 19:5; ISSN 0096-0802
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mist/steam cooling in a heated horizontal tube -- Part 2: Results and modeling
Mist/steam cooling in a heated horizontal tube -- Part 1: Experimental system