Share

TRANSIENT HEAT TRANSFER INTO A CLOSED SMALL VOLUME OF LIQUID OR SUPERCRITICAL HELIUM.

Author(s) : SCHMIDT C.

Type of article: Article

Summary

THE HEAT TRANSFER FROM A COPPER SURFACE INTO A CLOSED VOLUME OF LIQUID OR SUPERCRITICAL HELIUM IS INVESTIGATED. IN LIQUID HELIUM THE EVAPORATION AT THE HEATED SURFACE AFTER THE BEGINNING OF A HEAT PULSE LEADS TO A RAPID PRESSURE RISE ABOVE THE CRITICAL PRESSURE. THIS EFFECT REDUCES THE DURATION OF THE HIGH TRANSIENT HEAT TRANSFER IN THE NUCLEATE BOILING REGIME. FOR SMALL LIQUID HELIUM VOLUMES THE TRANSIENT HEAT TRANSFER IS NOT MUCH DIFFERENT FROM THAT OF SUPERCRITICAL HELIUM. SOME APPLICATIONS IN SUPERCONDUCTING MAGNETS IMPLY AN EXPONENTIALLY DECREASING HEAT LOAD. THE RESULTS ARE DISCUSSED QUANTITATIVELY USING A SIMPLE THEORETICAL MODEL.

Details

  • Original title: TRANSIENT HEAT TRANSFER INTO A CLOSED SMALL VOLUME OF LIQUID OR SUPERCRITICAL HELIUM.
  • Record ID : 1989-1666
  • Languages: English
  • Source: Cryogenics - vol. 28 - n. 9
  • Publication date: 1988

Links


See other articles in this issue (7)
See the source

Indexing