The Ignition, Combustion, and Radiant Intensity of Spherical Clouds of Hydrogen.
Abstract
The manner in which large hydrogen bubbles rise, mix, burn, and radiate is predicted for bubbles of varying diameter, initial velocity, and crosswind velocity using simplified models. The motion of buoyant gas bubbles in general is shown to be accurately described by the simplified entrainment model of Shui and Weyl for a variety of bubble sizes and compositions including small hydrogen bubbles as reported in the Russian literature, large bubbles resulting from the combustion of stoichiometric methane-oxygen mixtures (GEST experiments), and very large thermals associated with nuclear explosions. The degree to which the mixing is incomplete on a molecular scale is inferred from the observed volume increase of small hydrogen bubbles immediately after ignition, using pseudo-equilibrium, calculations with a partial reaction feature. The accuracy of the model used to predict the time history of IR radiation from hot combustion gases is verified by comparison with the observed radiation from the combustion products of methane-oxygen bubbles. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1977
- Accession Number
- ADA047979
Entities
People
- E. Stokes Fishburne
- Michael E. Neer
- Priscilla C. Petersen