Ignition Delay Times and Structure of Detonation Waves in CH4/O2/N2 and H2/O2/N2 Mixtures.
Abstract
Simplified chemical-kinetic mechanisms and reduced chemical-kinetic mechanisms were developed for describing structure of the dark zone formed over the burning surface of double base and nitramine propellants. It is believed that ignition delays in large caliber gun ballistic cycles are related to the chemistry taking place in the dark zone. Ignition delay times calculated using the simplified mechanisms were found to agree well with those calculated using detailed chemical-kinetic mechanisms. The simplified mechanisms are expected to be useful in interior ballistics calculations. Reduced chemical-kinetic mechanisms were developed to calculate the structures of premixed and nonpremixed flames burning various hydrocarbon fields. Asymptotic analyses were performed using the reduced mechanisms. Burning velocities of premixed flames and critical conditions of extinction of nonpremixed flames were calculated using results of the asymptotic analyses. Simplified chemical-kinetic mechanisms were developed for calculating ignition delay times in combustible mixtures used in the Ram Accelerator. The results of all these studies are described in eight journal articles and five technical reports published in proceedings of technical meetings.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 07, 1999
- Accession Number
- ADA369962
Entities
People
- Kalyanasundaram Seshadri
Organizations
- University of California, San Diego