Effect of local phenomena on subcooled boiling oscillations in natural circulation boiling loop
| Autor: | Swapan Paruya, Arnab Karmakar, Runa Dey |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Oscillation 020209 energy Mechanical Engineering Bubble Thermodynamics 02 engineering and technology Mechanics 01 natural sciences 010305 fluids & plasmas Volumetric flow rate Local Void Physics::Fluid Dynamics Subcooling Natural circulation Nuclear Energy and Engineering Boiling 0103 physical sciences 0202 electrical engineering electronic engineering information engineering General Materials Science Safety Risk Reliability and Quality Porosity Waste Management and Disposal |
| Zdroj: | Nuclear Engineering and Design. 310:205-216 |
| ISSN: | 0029-5493 |
| DOI: | 10.1016/j.nucengdes.2016.10.010 |
| Popis: | In this paper, the authors report the estimations of bubble frequency and oscillation of local void fraction and their role in subcooled boiling oscillations in a low-pressure natural circulation boiling loop. The estimations primarily rely on the measurements of impedance using inductance L–capacitance C–resistance R (LCR) meter. The bubble frequencies determined from the impedance signals and the images are comparable. The effect of inlet subcooling on the bubble frequency and the oscillation of local void fraction has been studied and found to be remarkable. Based on the comparison of the oscillations of local void fraction, local pressure and loop flow rate, the effect of local dynamic phenomena on the system oscillations clearly demonstrates that the oscillations of void fraction trigger high-amplitude flow oscillations with a delay between the oscillations of void fraction and loop flow rate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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