| Autor: |
WANG Zhaolong, LI Xiaoping, CHEN Daheng, QUAN Xiaojun, ZHENG Ping |
| Zdroj: |
China Sciencepaper; dec2017, Vol. 12 Issue 23, p2651-2655, 5p |
| Abstrakt: |
In order to explore the potential application of laser heating nanofluid flow strip boiling, the related factors of the threshold of light energy intensity needed for the bubble nucleation in the flow boiling of nanofluids under pulsed laser heating have been experimentally investigated. The heat source uses a pulsed laser with a wavelength of 792 nm. The laser beam can ex cite the longitudinal mode of localized surface plasma resonance in gold nanorods having diameters of 101 nm, and 433 nm in length. At a concentration of 1.824 µg/mL of nanofluid with gold nanorods, the effects of inlet temperature of the nanofluid, laser pulse frequency (at a pulse duty ratio of 50%) and pulse period of the laser (at a pulse duration of 10 ms) on the minimum laser intensity for bubble generation are investigated. The results show that higher inlet temperature of the nanofluid can lower the laser intensity needed for the vapor generation, and increasing the pulse frequency of the laser with a given pulse duration can decrease the minimum laser intensity with the same observation time. The minimum laser intensity required for bubble generation in the nanofluid has a maximum value at a laser pulse frequency of 100 Hz, which is independent of inlet velocity. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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