The paper further explores the suitability of dimensionless numbers proposed in past work for the analysis of flow stability in heated channels containing fluids at supercritical pressure. The achievements obtained by their use in the application to heated channels with imposed heat flux are summarised and the treatment is extended to imposed wall temperature conditions. Among the aspects considered having relevance for analyses and experiments in support to the design of Supercritical Water Reactors, the following are given particular attention: basis for the selection of the dimensionless numbers; use of dimensionless numbers in defining stability boundaries; applications in fluid-to-fluid comparisons; dimensionless form to be adopted for temperature; identification of dimensionless numbers suitable for setting up heat transfer correlations with supercritical fluids. The lines of further research in the field are finally discussed.
Dimensionless Parameters in Stability Analysis of Heated Channels with Supercritical Fluids at Imposed Heating Flux and Wall Temperature Conditions
AMBROSINI, WALTER
2010-01-01
Abstract
The paper further explores the suitability of dimensionless numbers proposed in past work for the analysis of flow stability in heated channels containing fluids at supercritical pressure. The achievements obtained by their use in the application to heated channels with imposed heat flux are summarised and the treatment is extended to imposed wall temperature conditions. Among the aspects considered having relevance for analyses and experiments in support to the design of Supercritical Water Reactors, the following are given particular attention: basis for the selection of the dimensionless numbers; use of dimensionless numbers in defining stability boundaries; applications in fluid-to-fluid comparisons; dimensionless form to be adopted for temperature; identification of dimensionless numbers suitable for setting up heat transfer correlations with supercritical fluids. The lines of further research in the field are finally discussed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.