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MASS TRANSFER OF SUPERSATURATED CONTAMINANTS IN CRYOGENIC HELIUM HEAT EXCHANGERS.

Author(s) : CHANG H. M., SMITH J. L. Jr

Type of article: Article

Summary

AN EXPERIMENTAL TECHNIQUE IS DEVELOPED TO MEASURE THE DISTRIBU TION OF FROST ACCUMULATED INSIDE THE PASSAGE OF A CRYOGENIC HELIUM HEAT EXCHANGER. THE FROST IS ACCUMULATED BY CONDENSATION OF A CONTAMINANT ON THE PASSAGE WALL DURING STEADY-FLOW OPERATION OF THE BALANCED COUNTERFLOW HEAT EXCHANGER. WHEN THE DEGREE OF SUPERSATURATION IS SMALL, THE ACCUMULATION DISTRIBUTIONAGREES WITH THE ANALYTICAL SOLUTION WITHOUT SNOW FORMATION. AS THE SUPERSATURATION INCREASES, A CLEAR SECONDARY PEAK IN THE DISTRIBUTION IS OBSERVED, WHICH RESULTS FROM THE FORMATION OF SNOW IN THE FREE STREAM AND ITS SUBSEQUENT DEPOSITION AS FROST ON THE WALL. AN ONSET CONDITION IS DEVELOPED FOR THE FORMATION OF SNOW OF A SUPERSATURATED CONTAMINANT IN HELIUM.

Details

  • Original title: MASS TRANSFER OF SUPERSATURATED CONTAMINANTS IN CRYOGENIC HELIUM HEAT EXCHANGERS.
  • Record ID : 1991-0120
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 33 - n. 6
  • Publication date: 1990/06

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