Accession Number : AD0832966

Title :   A CONTRIBUTION TO THE MEASUREMENT TO THE TEMPERATURE FIELD AND THE HEAT TRANSFER COEFFICIENTS IN AIR-COOLED GAS-PERMEATED PACKED COLUMNS (EIN BEITRAG ZUR MESSUNG DES TEMPERATUREFELDES UND DER WARMEUBERGANGSZAHLEN IN LUFTGEKUHLTEN GASDURCHSTROMTEN FULLKORPERSAULEN),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Uhlmann, S.

Report Date : 25 AUG 1967

Pagination or Media Count : 49

Abstract : Temperature variation was studied in a 3.14 m long, 100 mm diam. diaphragm column, filled with glass beads, under air flow-through and air-cooling. The bead diam. was 3.98, 6.13, 8.00, or 10.1 mm. An empirical relation is given, permitting normalized temp. to be derived at any point, provided the ratio of max. and min. temps. along a radius is known. The ratio of mean to max. normalized temp. which is calcd. and expressed as a function of the Reynolds no. grows with increasing and with larger bead diam. Mean Nusselt nos. are calcd. The non-steady-state length of the column is estd. and found to increase with decreasing bead sizes. Empirical relations of the form NuD = C (ReD) to the n power are established. The exponent is always n = 0.71. The results are summarized in a nomogram. (Author)

Descriptors :   (*CONDUCTION(HEAT TRANSFER), PIPES), GLASS, AIR COOLED, POROSITY, TEMPERATURE CONTROL, REYNOLDS NUMBER, GAS FLOW, CONVECTION(HEAT TRANSFER), HEAT FLUX, TEMPERATURE SENSITIVE ELEMENTS, LAMINAR FLOW, NUCLEAR REACTORS.

Subject Categories : Nuclear Fission Reactors(non-power)
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE