Investigation of Spray Cooling Performance on Different Heat Transfer Surfaces

Abstract—with the rapid development of laser technology and high integrated circuit technology in the field of aerospace, the equipment thermal dissipation is increasing sharply. The traditional thermal control methods such as air natural convection, forced convection and heat pipe cooling cannot meet the demand of high heat flux rejection. Additionally, high heat flux cooling techniques are more difficult to apply to airborne weapons and electronic devices. Consequently, a new efficient cooling technology is urgently required for their thermal management. Because of the advantages such as reduced coolant flow rate, no delay boiling, low temperature difference between the working fluid and the heated surface, and high heat flux removal capability, spray cooling has been one of the most attractive method to solve the high power dissipation problem. For the special requirements of airborne laser weapons and high power electronics, experimental studies were conducted to investigate the heat transfer performance of spray cooling on different heated surfaces. Keywords-component; spray cooling; airborne electronic equipment; green laser flow visualization; experimental study; heated surface structure I