A FRACTAL PRESSURE DROP MODEL FOR CABLE-IN-CONDUIT CONDUCTORS BASED ON POROUS MEDIA ANALOGY

Zhicai Ma and Yuanwen Gao
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Zhicai Ma: Department of Mechanics and Engineering Science, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, P. R. China2Key Laboratory of Mechanics on Environment and Disaster in Western China, The Ministry of Education of China, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
Yuanwen Gao: Department of Mechanics and Engineering Science, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, P. R. China2Key Laboratory of Mechanics on Environment and Disaster in Western China, The Ministry of Education of China, Lanzhou University, Lanzhou, Gansu 730000, P. R. China

FRACTALS (fractals), 2021, vol. 29, issue 07, 1-14

Abstract: Assessment of the pressure drop that occurs in cable-in-conduit conductors (CICCs) requires a reliable predictive model. In this paper, a fractal model to predict the pressure drop of helium flows in CICCs is proposed based on the porous media analogy and fractal theory. A fractal friction factor correlation is also derived using the proposed pressure drop model. The good agreement between the predictions and the experimental data for conductors with n1 = 3 verifies the validity of both the fractal pressure drop model and the friction factor correlation for such configuration conductors. The fractal correlation indicates that the friction factor of the cable bundle in a CICC is related not only to the void fraction but also to the average hydraulic diameter, the tortuosity of the fluid flow paths, the maximum pore size and the fractal dimension of the cable cross-section. This theoretical correlation does not contain any fitting constants and each parameter has a clear physical meaning.

Keywords: Cable-in-Conduit Conductors; Porous Media; Pressure Drop; Fractal Theory (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218348X21502078

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