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),
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 25, 1967
- Accession Number
- AD0832966
Entities
People
- S. Uhlmann
Organizations
- National Air and Space Intelligence Center