Abstract
Presented are results of experimental investigations concerned with formation of a nonstationary and essentially nonuniform temperature field of a water droplet (initial radius of 1 mm to 2 mm) under intensive heating in a flow of heated air (from 50◦C to 1000◦C). The method used for this purpose was a noncontact optical planar laser-induced fluorescence (PLIF) method. It is shown that temperature distribution in a water droplet is essentially inhomogeneous even under prolonged heating (to several tens of seconds). Reliability of the results of measurements by the noncontact PLIF method was analyzed by applying a group of fast miniature thermocouples. Restrictions of using the PLIF method for studying temperatures fields of evaporating droplets under high-temperature heating (over 800◦C) were marked out. Characteristic times of droplet existence (complete evaporation) were determined. It was analyzed how the temperature difference in a water droplet affects this parameter during heating and intensive phase transitions. It was substantiated that it is expedient to consider essentially inhomogeneous and nonstationary temperature field of a water droplet inmathematical modeling of the heat andmass transfer processes in high-temperature gas–vapor-droplet systems (corresponding, e.g., to burning or heat cleaning of liquids, firefighting, production of composite and gaseous fuels, their combustion, etc.).
| Original language | English |
|---|---|
| Pages (from-to) | 325-338 |
| Number of pages | 14 |
| Journal | Journal of Engineering Thermophysics |
| Volume | 26 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Jul 2017 |
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ASJC Scopus subject areas
- Environmental Engineering
- Modelling and Simulation
- Condensed Matter Physics
- Energy Engineering and Power Technology
Cite this
Application of the planar laser-induced fluorescence method to determine the temperature field ofwater droplets under intensive heating. / Volkov, R. S.; Kuznetsov, G. V.; Strizhak, P. A.
In: Journal of Engineering Thermophysics, Vol. 26, No. 3, 01.07.2017, p. 325-338.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Application of the planar laser-induced fluorescence method to determine the temperature field ofwater droplets under intensive heating
AU - Volkov, R. S.
AU - Kuznetsov, G. V.
AU - Strizhak, P. A.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Presented are results of experimental investigations concerned with formation of a nonstationary and essentially nonuniform temperature field of a water droplet (initial radius of 1 mm to 2 mm) under intensive heating in a flow of heated air (from 50◦C to 1000◦C). The method used for this purpose was a noncontact optical planar laser-induced fluorescence (PLIF) method. It is shown that temperature distribution in a water droplet is essentially inhomogeneous even under prolonged heating (to several tens of seconds). Reliability of the results of measurements by the noncontact PLIF method was analyzed by applying a group of fast miniature thermocouples. Restrictions of using the PLIF method for studying temperatures fields of evaporating droplets under high-temperature heating (over 800◦C) were marked out. Characteristic times of droplet existence (complete evaporation) were determined. It was analyzed how the temperature difference in a water droplet affects this parameter during heating and intensive phase transitions. It was substantiated that it is expedient to consider essentially inhomogeneous and nonstationary temperature field of a water droplet inmathematical modeling of the heat andmass transfer processes in high-temperature gas–vapor-droplet systems (corresponding, e.g., to burning or heat cleaning of liquids, firefighting, production of composite and gaseous fuels, their combustion, etc.).
AB - Presented are results of experimental investigations concerned with formation of a nonstationary and essentially nonuniform temperature field of a water droplet (initial radius of 1 mm to 2 mm) under intensive heating in a flow of heated air (from 50◦C to 1000◦C). The method used for this purpose was a noncontact optical planar laser-induced fluorescence (PLIF) method. It is shown that temperature distribution in a water droplet is essentially inhomogeneous even under prolonged heating (to several tens of seconds). Reliability of the results of measurements by the noncontact PLIF method was analyzed by applying a group of fast miniature thermocouples. Restrictions of using the PLIF method for studying temperatures fields of evaporating droplets under high-temperature heating (over 800◦C) were marked out. Characteristic times of droplet existence (complete evaporation) were determined. It was analyzed how the temperature difference in a water droplet affects this parameter during heating and intensive phase transitions. It was substantiated that it is expedient to consider essentially inhomogeneous and nonstationary temperature field of a water droplet inmathematical modeling of the heat andmass transfer processes in high-temperature gas–vapor-droplet systems (corresponding, e.g., to burning or heat cleaning of liquids, firefighting, production of composite and gaseous fuels, their combustion, etc.).
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U2 - 10.1134/S1810232817030031
DO - 10.1134/S1810232817030031
M3 - Article
VL - 26
SP - 325
EP - 338
JO - Journal of Engineering Thermophysics
JF - Journal of Engineering Thermophysics
SN - 1810-2328
IS - 3
ER -