The Development of Predictive Engineering Formulations for Diver Heating. Volume 1
Abstract
Predictive heat transfer equations have been developed to estimate the local supplementary heating necessary to support a resting diver. These formulations consider the diver's passive thermal protection in the form of a diving dress and the effects of his ambient environment upon the dress' thermal resistance. The mathematical model performs a numerical analysis on discrete composite layers comprised of the skin, dry protective suit, breathing gas mixture, and the surrounding fluid environment. The parametric properties associated with the heat transfer correlations were obtained from validated experimental heat flux and skin temperature data collected under specific environmental conditions. The regional skin temperatures of this model are predicted by using a series of linear algebraic equations which have been derived from those of Kerslake and which predict the segmental skin temperatures of a quasi-euthermic diver having pronounced vasoconstriction. The mathematical model was written as an interactive computer program. The program collects information on the diver's posture and the ambient environment, and then generates estimates of the required regional supplementary heating. The program also allows the comparison of predicted temperatures, heat fluxes, overall heat transfer coefficients, normalized temperatures, and Biot numbers to values computed from experimental data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1982
- Accession Number
- ADA115166
Entities
People
- Charles E. Johnson
- James D. Collins
Organizations
- Duke University Hospital