Showing papers by "Ralph L. Webb published in 1987"
TL;DR: In this article, an analytical model was developed to predict the heat transfer coefficient and friction factor of offset strip-fin heat exchanger surface geometry. But the model was not applied to the LAMINAR and TURBORN flow regimes.
244 citations
TL;DR: In this article, a finite element stress analysis model was used to predict the stress in the tubes and in the tube/header solder joint, and the predicted values agree well with the measured stress.
Abstract: This paper presents quantitative information on stress in copper/brass radiators. Strain gages were used to measure the stresses in the unsupported tubes near the header, and to determine thermal stress resulting from uneven expansion of the tubes and the side support bar. Strain measurements were performed on plain and ribbed ''turbulator'' tubes. The compressive strength of various fin arrays was also measured. An analytical model was developed to predict the compressive strength of the fin array as a function of the fin geometry parameters. A finite element stress analysis model was used to predict the stress in the tubes and in the tube/header solder joint. The predicted values agree well with the measured stress.