Baseline Evaluation of the TDNOVA Code
Abstract
Past attempts to simulate two-phase flow phenomena in high- performance, bagged-charge artillery using one-dimensional, two-phase flow interior ballistic codes were met with only limited success, presumably because of the inability of these models to capture configural complexities associated with the charge-chamber interface. The recent development of a fully two- dimensional, axisymmetric, two-phase flow model (TDNOVA) provides for the first time an explicit treatment of two-dimensional flamespread in bagged charges. Functioning of the basepad and centercore ignition system are included within the physical scope of the model, as is the influence of parasitic charge components which may exhibit exothermic or endothermic properties as well as resistance to gas- and solid-phase flows. Baseline calculations are presented which demonstrate excellent agreement between TDNOVA and its one-dimensional predecessor NOVA for an appropriate, dimensionally degenerate, bagged charge problem. Further calculations using TDNOVA, based on an axisymmetric representation of a 155-mm howitzer, are shown to reveal an acceptably small level of sensitivity to a reasonable range of values for various user-definable parameters, such as mesh size.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1982
- Accession Number
- ADA120718
Entities
People
- Albert W. Horst
Organizations
- Ballistic Research Laboratory