Abstract
A high-temperature stainless steel sphere was immersed into various salt solutions to investigate film boiling behavior at vapor film collapse. The film boiling behavior around the sphere was observed with a high-speed digital-video camera. Because the salt additives enhance the condensation heat transfer, the observed vapor film was thinner. The surface temperature of the sphere was measured. Salt additives increased the quenching (vapor film collapse) temperature because the frequency of direct contact between the sphere surface and the coolant increased. Quenching temperature increases with increased salt concentration. The quenching temperature, however, approaches a constant value when the salt concentration is close to its saturation concentration. The quenching temperature is well correlated with ion molar concentration, which is a number density of ions, regardless of the type of hydrated salts.
| Original language | English |
|---|---|
| Article number | 012902 |
| Journal | Journal of Engineering for Gas Turbines and Power |
| Volume | 131 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2009 Jan 1 |
| Externally published | Yes |
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Keywords
- Film boiling
- Hydrated salt
- Quenching temperature
- Vapor film
ASJC Scopus subject areas
- Nuclear Energy and Engineering
- Fuel Technology
- Aerospace Engineering
- Energy Engineering and Power Technology
- Mechanical Engineering
Cite this
Effect of hydrated salt additives on film boiling behavior at vapor film collapse. / Arai, Takahiro; Furuya, Masahiro.
In: Journal of Engineering for Gas Turbines and Power, Vol. 131, No. 1, 012902, 01.01.2009.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of hydrated salt additives on film boiling behavior at vapor film collapse
AU - Arai, Takahiro
AU - Furuya, Masahiro
PY - 2009/1/1
Y1 - 2009/1/1
N2 - A high-temperature stainless steel sphere was immersed into various salt solutions to investigate film boiling behavior at vapor film collapse. The film boiling behavior around the sphere was observed with a high-speed digital-video camera. Because the salt additives enhance the condensation heat transfer, the observed vapor film was thinner. The surface temperature of the sphere was measured. Salt additives increased the quenching (vapor film collapse) temperature because the frequency of direct contact between the sphere surface and the coolant increased. Quenching temperature increases with increased salt concentration. The quenching temperature, however, approaches a constant value when the salt concentration is close to its saturation concentration. The quenching temperature is well correlated with ion molar concentration, which is a number density of ions, regardless of the type of hydrated salts.
AB - A high-temperature stainless steel sphere was immersed into various salt solutions to investigate film boiling behavior at vapor film collapse. The film boiling behavior around the sphere was observed with a high-speed digital-video camera. Because the salt additives enhance the condensation heat transfer, the observed vapor film was thinner. The surface temperature of the sphere was measured. Salt additives increased the quenching (vapor film collapse) temperature because the frequency of direct contact between the sphere surface and the coolant increased. Quenching temperature increases with increased salt concentration. The quenching temperature, however, approaches a constant value when the salt concentration is close to its saturation concentration. The quenching temperature is well correlated with ion molar concentration, which is a number density of ions, regardless of the type of hydrated salts.
KW - Film boiling
KW - Hydrated salt
KW - Quenching temperature
KW - Vapor film
UR - http://www.scopus.com/inward/record.url?scp=78149280600&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78149280600&partnerID=8YFLogxK
U2 - 10.1115/1.2983056
DO - 10.1115/1.2983056
M3 - Article
AN - SCOPUS:78149280600
VL - 131
JO - Journal of Engineering for Gas Turbines and Power
JF - Journal of Engineering for Gas Turbines and Power
SN - 0742-4795
IS - 1
M1 - 012902
ER -