Abstract
Regularities pertinent to counter mixing of the flows of high-temperature (1000 K) gases and water (with the characteristic droplet sizes from 0.05 to 0.5 mm) are experimentally investigated using high- speed (10<sup>5</sup> snapshots per second) cross-correlation video recording equipment and panoramic optic digital “tracer” visualization methods (called the Particle Image Velocimetry and Interferometric Particle Imaging techniiques). The sizes of droplets entrained by high-temperature gases and their motion velocities acquired after having been mixed with gases (with the gas motion velocities varied in the range of 0.1-2.5 m/s) are established. The initial droplet motion velocities were varied from 0.5 to 5.0 m/s. Two characteristic water droplet motion modes in the counter flow of high-temperature gases under the conditions of intense phase transformations were established. It is demonstrated that the droplet motion pattern in the counter flow of high-temperature gases, as well as the droplet evaporation intensity depend in the main on the initial sizes of liquid droplets. The integral dependence Re<inf>dr</inf> = f(Re<inf>g</inf>) using which it is possible to predict the droplet motion modes and trajectories, as well as phase transformation intensity with the a priori known droplet sizes and steam–droplet and gas flow velocities is obtained.
| Original language | English |
|---|---|
| Article number | A008 |
| Pages (from-to) | 586-592 |
| Number of pages | 7 |
| Journal | Thermal Engineering (English translation of Teploenergetika) |
| Volume | 62 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2015 |
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Keywords
- Droplets
- Entrainment
- Evaporation
- High-temperature gases
- Panoramic optical methods
- Polydisperse water flow
ASJC Scopus subject areas
- Energy Engineering and Power Technology
- Nuclear Energy and Engineering
Cite this
Experimentally determining the sizes of water flow droplets entrained by high-temperature gases. / Volkov, R. S.; Zhdanova, Alena Olegovna; Kuznetsov, G. V.; Strizhak, P. A.
In: Thermal Engineering (English translation of Teploenergetika), Vol. 62, No. 8, A008, 2015, p. 586-592.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Experimentally determining the sizes of water flow droplets entrained by high-temperature gases
AU - Volkov, R. S.
AU - Zhdanova, Alena Olegovna
AU - Kuznetsov, G. V.
AU - Strizhak, P. A.
PY - 2015
Y1 - 2015
N2 - Regularities pertinent to counter mixing of the flows of high-temperature (1000 K) gases and water (with the characteristic droplet sizes from 0.05 to 0.5 mm) are experimentally investigated using high- speed (105 snapshots per second) cross-correlation video recording equipment and panoramic optic digital “tracer” visualization methods (called the Particle Image Velocimetry and Interferometric Particle Imaging techniiques). The sizes of droplets entrained by high-temperature gases and their motion velocities acquired after having been mixed with gases (with the gas motion velocities varied in the range of 0.1-2.5 m/s) are established. The initial droplet motion velocities were varied from 0.5 to 5.0 m/s. Two characteristic water droplet motion modes in the counter flow of high-temperature gases under the conditions of intense phase transformations were established. It is demonstrated that the droplet motion pattern in the counter flow of high-temperature gases, as well as the droplet evaporation intensity depend in the main on the initial sizes of liquid droplets. The integral dependence Redr = f(Reg) using which it is possible to predict the droplet motion modes and trajectories, as well as phase transformation intensity with the a priori known droplet sizes and steam–droplet and gas flow velocities is obtained.
AB - Regularities pertinent to counter mixing of the flows of high-temperature (1000 K) gases and water (with the characteristic droplet sizes from 0.05 to 0.5 mm) are experimentally investigated using high- speed (105 snapshots per second) cross-correlation video recording equipment and panoramic optic digital “tracer” visualization methods (called the Particle Image Velocimetry and Interferometric Particle Imaging techniiques). The sizes of droplets entrained by high-temperature gases and their motion velocities acquired after having been mixed with gases (with the gas motion velocities varied in the range of 0.1-2.5 m/s) are established. The initial droplet motion velocities were varied from 0.5 to 5.0 m/s. Two characteristic water droplet motion modes in the counter flow of high-temperature gases under the conditions of intense phase transformations were established. It is demonstrated that the droplet motion pattern in the counter flow of high-temperature gases, as well as the droplet evaporation intensity depend in the main on the initial sizes of liquid droplets. The integral dependence Redr = f(Reg) using which it is possible to predict the droplet motion modes and trajectories, as well as phase transformation intensity with the a priori known droplet sizes and steam–droplet and gas flow velocities is obtained.
KW - Droplets
KW - Entrainment
KW - Evaporation
KW - High-temperature gases
KW - Panoramic optical methods
KW - Polydisperse water flow
UR - http://www.scopus.com/inward/record.url?scp=84942310712&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84942310712&partnerID=8YFLogxK
U2 - 10.1134/S0040601515080091
DO - 10.1134/S0040601515080091
M3 - Article
VL - 62
SP - 586
EP - 592
JO - Thermal Engineering (English translation of Teploenergetika)
JF - Thermal Engineering (English translation of Teploenergetika)
SN - 0040-6015
IS - 8
M1 - A008
ER -