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HEAT TRANSFER AND FLOW INSTABILITY IN A SUPERCONDUCTING MACHINE ROTATING AT 3,000 RPM.

Author(s) : KHAN W. I.

Type of article: Article

Summary

HEAT TRANSFER MEASUREMENTS HAVE BEEN CARRIED OUT ON THE LIQUID HELIUM 4 IN A SIDE ARM ROTATING AT A SPEED OF 3,000 RPM. THE HEAT TRANSFER CELL CONSISTS OF A COPPER DISC MOUNTED PERPENDICULARLY TO THE RADIAL DIRECTION. THE FLOW PATTERN OF HELIUM 4 GAS THROUGH A U-TUBE UNDER A SELF PUMPING SYSTEM IN A ROTATING FRAME HAS BEEN STUDIED ANALYTICALLY. IT CAN BE DEMONSTRATED THAT THE FLOW POLARITY IS INFLUENCED BY THE VELOCITY GRADIENT OF THE FRICTION FACTOR IN THE REGION, BETWEEN STREAM LINE AND TURBULENT MOTIONS, WHICH CAN LEAD TO FLOW INSTABILITY WHICH MAY OCCUR IN BOTH INCREASING AND DECREASING SPEED MODES OR HEAT INPUTS.

Details

  • Original title: HEAT TRANSFER AND FLOW INSTABILITY IN A SUPERCONDUCTING MACHINE ROTATING AT 3,000 RPM.
  • Record ID : 1985-0032
  • Languages: English
  • Source: Cryogenics - vol. 24 - n. 1
  • Publication date: 1984

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