https://doi.org/10.1051/epjconf/201919600055
The usage of infrared thermography to investigate spatial variations of heat transfer at spray cooling
1 Kutateladze Institute of Thermophysics SB RAS, 630090, Lavrentyev ave. 1, Novosibirsk, Russia
2 Novosibirsk State University, 630090, 2 Pirogova str., Novosibirsk, Russia
* Corresponding author: surtaevas@gmail.com
Published online: 14 January 2019
In present paper new approach to study heat transfer at spray cooling, based on the using of high-speed infrared thermography with high spatial resolution is proposed. Also in the paper new data on basic spray parameters, including sizes and velocities of droplets at different pressure at the nozzle inlet were obtained with the use of shadow technique and high-speed video camera. It is found, that heat transfer coefficient is unequally spatially distributed value and essentially depends on flow rate in the stationary irrigation mode. The dependence of heat transfer coefficient on a distance between spray source and heat exchange surface is obtained and an optimal distance corresponding to the maximum heat transfer intensity at present configuration of irrigation points relatively to the heating surface is determined.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
