Accession Number : ADA130831


Title :   Fluid Dynamic Mechanisms and Interactions within Separated Flows and Their Effects on Missile Aerodynamics


Descriptive Note : Final technical rept. 1979-1983


Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF MECHANICAL AND INDUSTRIAL ENGINEERING


Personal Author(s) : Addy, A L ; Chow, W L ; Korst, H H ; White, R A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a130831.pdf


Report Date : May 1983


Pagination or Media Count : 387


Abstract : Significant data and detailed results of a joint research effort investigating the fluid dynamic mechanisms and interactions within separated flows are presented. The results were obtained through analytical, experimental, and computational investigations of base flow related configurations. The research objectives focus on understanding the component mechanisms and interactions which establish and maintain separated flow regions. Flow models and theoretical analyses were developed to describe the base flowfield. The research approach has been to conduct extensive small-scale experiments on base flow configurations and to analyze these flows by component models and finite- difference techniques. The modeling of base flows of missiles (both powered and unpowered) for transonic and supersonic freestreams has been successful by component models. Research on plume effects and plume modeling indicated the need to match initial plume slope and plume surface curvature for valid wind tunnel simulation of an actual rocket plume. The assembly and development of a state-of-the-art laser Doppler velocimeter (LDV) system for experiments with two-dimensional small-scale models has been completed and detailed velocity and turbulence measurements are underway. The LDV experiments include the entire range of base flowfield mechanisms -- shear layer development, recompression/ reattachment, shock-induced separation, and plume-induced separation.


Descriptors :   *FLOW SEPARATION , *BASE FLOW , SHEAR PROPERTIES , COMPUTER PROGRAMS , MATHEMATICAL MODELS , GUIDED MISSILES , INTERACTIONS , TURBULENCE , GAS DYNAMICS , FINITE DIFFERENCE THEORY , FLOW FIELDS , SHOCK , AERODYNAMIC CHARACTERISTICS , INTERFERENCE , WAKE , ATTACHMENT , DOPPLER SYSTEMS , SUPERSONIC FLOW , FLUID DYNAMICS , FREE STREAM , EXHAUST PLUMES , WIND TUNNEL MODELS , TRANSONIC FLOW , LASER VELOCIMETERS , BASE PRESSURE , ROCKET EXHAUST


Subject Categories : Guided Missile Dynam, Config & Cntrl Surfaces


Distribution Statement : APPROVED FOR PUBLIC RELEASE