The local and overall heat transfer around a horizontal, isothermal, circular cylinder exposed to a crossflow of a water-in-air spray has been determined experimentally. The investigation involved a closed loop wind tunnel in which a spray nozzle and an electrically heated test cylinder were located. The rate of heat transfer was measured for free stream air Reynolds numbers of 30,000, 75,000, and 118,000; the water-to-air mass flow ratios varied from 0 to 0.13. Results indicate that two-component heat transfer coefficients may be thirty times those of single-component (air) flow.
SUBSCRIPTS b = balls Bu = vapor bubble d c = related to porosity f = liquid fg = liquid to vapor z = referenced at 80" F. sat = saturation s = superficial velocity t = test section u = vapor w = wall 1 = inlet to test section 2 = outlet of test section 3 5 = injection water inlet = related to bubble diameter = outlet of mixing section literature CitedThe local heat transfer coefficients around the periphery of an isothermal cylinder exposed to a crossflow consisting of a water-in-air spray have been investigated analytically. The analysis is valid over the leading
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