Heat transfer from a cylinder in an air-water spray flow stream

AIChE Journal ◽  
1969 ◽  
Vol 15 (3) ◽  
pp. 357-362 ◽  
Author(s):  
R. Lawrence Mednick ◽  
C. Phillip Colver
Keyword(s):  
Heat Transfer ◽  
Water Spray ◽  
Flow Stream

scholarly journals Heat transfer through a water spray curtain under the effect of a strong radiative source

2006 ◽  
Vol 41 (1) ◽  
pp. 15-30 ◽  
Author(s):  
P. Boulet ◽  
A. Collin ◽  
G. Parent
Keyword(s):  
Heat Transfer ◽  
Water Spray

Heat Transfer Associated With Air-Water Spray Cooling of Forgings From High Temperatures

2001 ◽  
Author(s):  
J. Ward ◽  
M. de Oliveira ◽  
D. R. Garwood ◽  
R. A. Wallis
Keyword(s):  
Heat Transfer ◽  
Water Flow ◽  
Gas Turbines ◽  
Spray Cooling ◽  
Solution Temperature ◽  
Air Cooling ◽  
Water Spray ◽  
Transfer Rates ◽  
Wide Range ◽  
Water Spray Cooling

Abstract The desired mechanical properties of the nickel-based or titanium forgings used in gas turbines for aircraft and power generation applications can be controlled by varying the rate of cooling from the so-called solution temperature during an initial heat treatment process. The use of dilute air-water spray cooling of these forgings is a technique which can provide heat transfer rates lying between those associated with conventional oil quenching or convective air-cooling. Air assisted atomisation can result in fine sprays over a wide range of water flow rates and it has a further advantage in that the air “sweeps” the surface and hence helps to prevent the build up of deleterious vapour films at high surface temperatures. The paper presents experimental data for the heat transfer rates associated with the use of these sprays to cool surfaces from temperatures of approximately 800°C. Many forgings contain surface recesses, which can lead to build up or “pooling” of the water so that the effect of variations in surface geometry is also reported. Periodic interruption of the water flow is a technique which can be employed to provide additional control of the heat transfer rate, particularly at temperatures below 500°C so that data is also presented for pulsed sprays.

scholarly journals Exploration of Impinging Water Spray Heat Transfer at System Pressures Near the Triple Point

2013 ◽  
Author(s):  
Eric L. Golliher ◽  
Shi-chune Yao
Keyword(s):  
Heat Transfer ◽  
Triple Point ◽  
Low Pressure ◽  
Transfer Model ◽  
Space Vehicles ◽  
Water Spray ◽  
Flash Evaporation ◽  
Multiphase Transport ◽  
Triple Point Of Water ◽  
Ice Water

The heat transfer of a water spray impinging upon a surface in a very low pressure environment is of interest to cooling of space vehicles during launch and re-entry, and to industrial processes where flash evaporation occurs. At very low pressure, the process occurs near the triple point of water, and there exists a transient multiphase transport problem of ice, water and water vapor. At the impingement location, there are three heat transfer mechanisms: evaporation, freezing and sublimation. A preliminary heat transfer model was developed to explore the interaction of these mechanisms at the surface and within the spray.

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