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Cryogenics v.36 no.6, 1996년, pp.465 - 469  

Pressure drop of two-phase helium flowing in a large solenoidal magnet cooling path and a long transfer line

Haruyama, T. ; Araoka, O. ; Doi, Y. ; Kasami, K. ; Makida, Y. ; Suzuki, S. ; Tanaka, K. ; Yamamoto, A. ;
  • 초록  

    Abstract The pressure drop of two-phase helium flowing in a 64 m cooling path of a magnet and a 58 m connecting transfer line was investigated. A large thin superconducting solenoidal magnet, which was developed for the SDC detector (Solenoidal Detector Collaboration for the former SSC project), was used for this experiment. The magnet is 3.8 m in diameter, 2 m in length with a total cold mass of 4.5 tons. It was cooled by two-phase helium flow passing through a serpentine cooling path. The pressure drops of single-phase gas helium flow during cool down and two-phase helium flow in steady cooling were measured and compared with predictions. The measured pressure drop of single-phase helium agreed well with the prediction; however, the measured pressure drop of two-phase helium was much larger than the predictions based on separated and homogeneous flow models. In the high mass-flow region of two-phase flow, slight pressure oscillations were observed in the inlet, outlet and differential pressures of the magnet. The magnet temperature was stable and not affected by those oscillations.


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  • 주제어

    two-phase helium .   pressure drop .   magnet cooling.  

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