Numerical Investigation of Twin-Nozzle Rocket Plume Phenomenology, Part 2
Abstract
The Generalized Implicit Flow Solver (GIFS) computer program has been modified and applied for analysis of three-dimensional, reacting, two-phase flow simulation problems. The intent of the original GIFS development effort was to provide the Joint Army, Navy, NASA, Air Force (JANNAF) community with a standard computational methodology to simulate multiple nozzle/plume flow-field phenomena and other three-dimensional effects. The Van Leer Flux Splitting option has been successfully implemented into the existing GIFS model and provides a more robust solution scheme, making application of the model more reasonable for engineering applications. This paper is a continuation of the previous work and reports the significant results of parametric flow-field simulations resulting from a dual-nozzle propulsion system operating at a high-altitude flight condition. In support of this effort, four calculations of Titan II SLV flow fields have been completed to assess the effects of three-dimensionality, missile body effects, chemistry, and gas generator flow on simulated plume exhaust flow-field properties. These calculations indicate that three-dimensionality is always an important factor and could substantially influence the interpretation of the results. If three dimensional effects are oversimplified in the model, analyses of the spatial results can be misinterpreted and misapplied. The missile body effect can also generate three-dimensional influences affecting the Mach reflection location, the plume/plume impingement shock location, inviscid shock structure, and shear layer growth. The gas generator flow influences the very near field simulation but is significantly dampened beyond approximately 1 meter downstream of the nozzle exit (nonreacting). If missile base heating, recirculation effects, or nozzle impingement heat-transfer analyses are required, the gas generator flow, including a kinetic chemistry model is the dominant influence.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1998
- Accession Number
- ADA345910
Entities
People
- Houshang B. Ebrahimi
Organizations
- Arnold Engineering Development Complex