Transactions of Nanjing University of Aeronautics & Astronautics
Experiment on Spray Cooling Performance with Different Additives of Different Mass Fraction
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Abstract:
As an efficient cooling method for high heat flux field, spray cooling has a great application potential on aircraft directed energy weapon cooling. Based on previous research results, an experimental system of open-loop spray cooling was established, and the potassium chloride aqueous solutions and ethylene glycol aqueous solutions with different mass fractions were applied to investigate the influence of different additives on spray cooling system performance. Besides, theoretical analysis was conducted according to the droplet breakage principle and the characteristic parameters of fluid mechanics. The results indicate that heat transfer can be enhanced by adding potassium chloride up to a certain concentration and then decrease with higher concentration. Heat transfer is deteriorated with the increase of ethylene glycol concentration. Both of the two additives can reduce the freezing point of the system, and ethylene glycol is preferred to improve the application range of the system in consideration of the corrosion of salt solution.
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