Analysis of the QUELL experiment and comparisons with numerical simulations (QUENCHER)

Autor:	S.P Smith, S Pourrahimi, J.P Freidberg, A Shajii
Rok vydání:	1998
Předmět:	Materials science Computer simulation General Physics and Astronomy chemistry.chemical_element Thermodynamics Heat transfer coefficient Mechanics Superconducting magnet Conductor chemistry Heat transfer General Materials Science Heat equation Diffusion (business) Helium
Zdroj:	Cryogenics. 38:479-490
ISSN:	0011-2275
DOI:	10.1016/s0011-2275(98)00013-7
Popis:	This paper presents a detailed analysis of the Quench Long Length (QUELL) experiment. A number of different quench scenarios are compared with numerical simulations using the QUENCHER model. It is shown that in all cases the maximum helium pressure rise, the conductor temperature rise, the quench propagation velocity, and the quench voltage obtained from the numerical studies are in very good agreement with the experiment. Based on the experimental results during the heat pulse propagation, together with a more detailed analysis of the heat transfer mechanism between the helium in the central hole and the cable space a new heat diffusion term is proposed in QUENCHER. This diffusion mechanism is a direct consequence of the finite heat transfer coefficient between the cable and the central hole, and the fact that helium velocity in the hole is much larger than the cable space. Results are presented with and without the new diffusion term in the model.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c7b4d9a6ec29e626c91b9d32f2a11e95 https://doi.org/10.1016/s0011-2275(98)00013-7 Zobrazit plný text záznamu Full Text from ScienceDirect