The jet impingement cooling is always preferred over the other cooling methods due to its high heat removal capability. However, rapid quenching may lead to the formation of cracks and poor ductility to the quenched surface. Mist jet impingement cooling offers an alternative method to uncontrolled rapid cooling, particularly in steel and electronic industries. In mist cooling, the droplets are atomized by compressed air. Experiments are performed under transient conditions using two full-cone spray nozzles (Lechler Pneumatic atomizing nozzle 136.115.xx.A2 and 136.134.xx.A2) to study the effect of subcooling and nozzle diameter on surface heat flux. The hot surface used for the experiment is a stainless steel foil (AISI-304) of thickness 0.15mm. The initial surface temperature of the plate is maintained at 500±10°C with the help of an AC transformer. Infrared thermal image camera (A655sc, FLIR System) is used for data estimation. The IR camera and the nozzle are positioned on either side of the plate. The variation in surface temperature has been acquired at 8 different spatial points. It has been observed that that as we move away from the stagnation point then irrespective of air and water flow rates surface heat flux decreases. The maximum surface heat flux obtained at the stagnation point. With the increase in diameter surface heat flux increases irrespective of pressure values. The correlation between qm/qstag experimental and predicted values has been shown.
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2018 26th International Conference on Nuclear Engineering
July 22–26, 2018
London, England
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
978-0-7918-5149-4
PROCEEDINGS PAPER
Effect of Subcooling and Nozzle Diameter on Heat Transfer Characteristics of Downward Facing Hot Surfaces Using Mist Jet Available to Purchase
Avadhesh Kumar Sharma,
Avadhesh Kumar Sharma
Indian Institute of Technology Indore, Indore, India
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Monika Meena,
Monika Meena
Indian Institute of Technology Indore, Indore, India
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Anirudh Soni,
Anirudh Soni
Indian Institute of Technology Indore, Indore, India
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Santosh K. Sahu
Santosh K. Sahu
Indian Institute of Technology Indore, Indore, India
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Avadhesh Kumar Sharma
Indian Institute of Technology Indore, Indore, India
Monika Meena
Indian Institute of Technology Indore, Indore, India
Anirudh Soni
Indian Institute of Technology Indore, Indore, India
Santosh K. Sahu
Indian Institute of Technology Indore, Indore, India
Paper No:
ICONE26-82211, V06BT08A040; 7 pages
Published Online:
October 24, 2018
Citation
Sharma, AK, Meena, M, Soni, A, & Sahu, SK. "Effect of Subcooling and Nozzle Diameter on Heat Transfer Characteristics of Downward Facing Hot Surfaces Using Mist Jet." Proceedings of the 2018 26th International Conference on Nuclear Engineering. Volume 6B: Thermal-Hydraulics and Safety Analyses. London, England. July 22–26, 2018. V06BT08A040. ASME. https://doi.org/10.1115/ICONE26-82211
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