A Method of Investigating Scales of Motion in a Turbulent Wake
Abstract
Knowledge of the scales of motion in the flow around a body is important for accurate turbulence modeling in computational fluid dynamic calculations. Useful data can be measured in wind tunnel experiments, but often not for the free flight conditions of interest. This report examines the possibility of determining such information from shadowgraphs taken in a ballistic range. The application of digital scanning machines and spatial correlation interrogation to shadowgraphs are described. One method of analyzing a shadowgraph to extract information about turbulence structures in the flow field is discussed. Results are shown for the analysis of two regions in the wake of a projectile. This method might be used to quantify the effects of various projectile modifications on a turbulent structure, for example the introduction of a base burn unit.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1991
- Accession Number
- ADA237923
Entities
People
- John D. Kuzan
- Phillip C. Dykstra
Organizations
- Ballistic Research Laboratory