Hydrodynamics and heat transfer in swirl flow under conditions of one-side heating. Part 2: Boiling heat transfer. Critical heat fluxes |
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| Authors: | Aleksey V. Dedov Alexander T. Komov Alexander N. Varava Victor V. Yagov |
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| Affiliation: | 1. Department of Engineering, University of Palermo, Viale delle Scienze, Ed. 6, 90128, Palermo, Italy;2. ENEA FSN, ENEA CR Brasimone, Camugnano, Italy;3. ENEA FSN, ENEA CR Frascati, Frascati, Italy;4. Department of Astronautical, Electrical and Energy Engineering, Sapienza University of Rome, Roma, Italy;1. Department of Astronautical, Electrical and Energy Engineering, Sapienza University of Rome, Roma, Italy;2. ENEA FSN-FUSTEC-TES, ENEA CR Frascati, Frascati, Italy;3. ENEA FSN-ING-PAN, ENEA CR Brasimone, Camugnano, Italy;4. University of Palermo, Viale delle Scienze, Edificio 6, 90128, Palermo, Italy;1. Centrum výzkumu ?e?, ?e?, Czech Republic;2. Politecnico di Torino, Torino, Italy;1. Massachusetts Institute of Technology, Department of Nuclear Science & Engineering, United States;2. Massachusetts Institute of Technology, Department of Mechanical Engineering, United States |
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| Abstract: | The paper gives the basic results of experimental investigation of boiling heat transfer in heat-absorbing devices of the ITER thermonuclear reactor, which are subjected to one-side heating. The experimental data on heat transfer at nucleate and film boiling and on critical heat fluxes are obtained in the following range of parameters of water flow: pressure p = 0.7–2.0 MPa, mass flux G = 340–25 000 kg/(m2 s), and water temperature at the inlet Tin = 20–60 °C. A twisted tape is inserted in the circular channel in order to form swirling flow of water. The investigations are performed for tapes with different values of flow swirl coefficient, as well for test sections without a tape. Appropriate calculation formulas are derived, which reliably generalize the experimental data. |
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