Abstract
In this paper, we present the rates and typical durations of high-temperature heating and evaporation of water droplets determined for the dominating conductive, convective or radiative energy supply. We developed three setups for heating a water droplet: on a substrate (conduction), in a muffle furnace (radiation), and in a heated airflow (convection). The heating temperature is up to 1000 °C to correspond high-temperature technologies, namely thermal cleaning of fluids, polydisperse fire extinguishing with low water consumption, etc. With the help using of a high-speed video recording system, we determine the water droplet lifetimes (the times of their complete evaporation). Using Planar Laser Induced Fluorescence, we establish the quantitative differences between the water droplet heating rates (heating time to lifetime ratios) on the three setups. Maximum temperatures are determined that the water droplets reach when exposed to different heating mechanisms. Furthermore, we obtain the criterial dependences to connect the main attributes of temperature field generation of an evaporating water droplet with the heating conditions. Finally, we identify possible implications of the research findings and ways to further improve the newly developed experimental approach.
| Original language | English |
|---|---|
| Pages (from-to) | 340-355 |
| Number of pages | 16 |
| Journal | Applied Thermal Engineering |
| Volume | 131 |
| DOIs | |
| Publication status | Published - 25 Feb 2018 |
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Keywords
- Conductive, convective, radiative heating
- Heating and evaporation rates
- Planar Laser Induced Fluorescence
- Unsteady temperature field
- Water droplet
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Industrial and Manufacturing Engineering
Cite this
Unsteady temperature fields of evaporating water droplets exposed to conductive, convective and radiative heating. / Kuznetsov, G. V.; Piskunov, M. V.; Volkov, R. S.; Strizhak, P. A.
In: Applied Thermal Engineering, Vol. 131, 25.02.2018, p. 340-355.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Unsteady temperature fields of evaporating water droplets exposed to conductive, convective and radiative heating
AU - Kuznetsov, G. V.
AU - Piskunov, M. V.
AU - Volkov, R. S.
AU - Strizhak, P. A.
PY - 2018/2/25
Y1 - 2018/2/25
N2 - In this paper, we present the rates and typical durations of high-temperature heating and evaporation of water droplets determined for the dominating conductive, convective or radiative energy supply. We developed three setups for heating a water droplet: on a substrate (conduction), in a muffle furnace (radiation), and in a heated airflow (convection). The heating temperature is up to 1000 °C to correspond high-temperature technologies, namely thermal cleaning of fluids, polydisperse fire extinguishing with low water consumption, etc. With the help using of a high-speed video recording system, we determine the water droplet lifetimes (the times of their complete evaporation). Using Planar Laser Induced Fluorescence, we establish the quantitative differences between the water droplet heating rates (heating time to lifetime ratios) on the three setups. Maximum temperatures are determined that the water droplets reach when exposed to different heating mechanisms. Furthermore, we obtain the criterial dependences to connect the main attributes of temperature field generation of an evaporating water droplet with the heating conditions. Finally, we identify possible implications of the research findings and ways to further improve the newly developed experimental approach.
AB - In this paper, we present the rates and typical durations of high-temperature heating and evaporation of water droplets determined for the dominating conductive, convective or radiative energy supply. We developed three setups for heating a water droplet: on a substrate (conduction), in a muffle furnace (radiation), and in a heated airflow (convection). The heating temperature is up to 1000 °C to correspond high-temperature technologies, namely thermal cleaning of fluids, polydisperse fire extinguishing with low water consumption, etc. With the help using of a high-speed video recording system, we determine the water droplet lifetimes (the times of their complete evaporation). Using Planar Laser Induced Fluorescence, we establish the quantitative differences between the water droplet heating rates (heating time to lifetime ratios) on the three setups. Maximum temperatures are determined that the water droplets reach when exposed to different heating mechanisms. Furthermore, we obtain the criterial dependences to connect the main attributes of temperature field generation of an evaporating water droplet with the heating conditions. Finally, we identify possible implications of the research findings and ways to further improve the newly developed experimental approach.
KW - Conductive, convective, radiative heating
KW - Heating and evaporation rates
KW - Planar Laser Induced Fluorescence
KW - Unsteady temperature field
KW - Water droplet
UR - http://www.scopus.com/inward/record.url?scp=85037708710&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85037708710&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2017.12.021
DO - 10.1016/j.applthermaleng.2017.12.021
M3 - Article
VL - 131
SP - 340
EP - 355
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
SN - 1359-4311
ER -