The problem of direct initiation of detonations has been investigated numerically by using a more realistic chemical kinetics scheme. The chemical kinetics model is based on a three-step chain-branching reaction consists sequentially of a chain-initiation and a chain-branching step, followed by a temperature independent chain-termination. The steady ZND structure using the 3-step chemical kinetics model is compared with that based on the standard single-step Arrhenius rate model. An unsteady computation has also been performed to determine whether the solution from steady-state analysis can be approached asymptotically from a transient development. / The three regimes of direct initiation have been numerically simulated for planar, cylindrical and spherical geometries using the present 3-step chemical kinetics model. The use of a more realistic reaction scheme allows a unique value for the critical initiation energy to be defined. / Some general theories for direct initiation have been verified from the results of the present numerical simulation using a more detailed chemical kinetics model, where a definitive value of the critical energy was obtained. (Abstract shortened by UMI.)
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.31063 |
| Date | January 2001 |
| Creators | Ng, Hoi Dick. |
| Contributors | Lee, John H. S. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Mechanical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001808194, proquestno: MQ70245, Theses scanned by UMI/ProQuest. |
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