Experimental and Numerical Investigation of High Speed High-Temperature Jet Interaction Flowfields
Abstract
An experimental analysis of the mean and turbulent flow properties for sonic and Mach 3 injection into a Mach 3 freestream was accomplished. The range of conditions included: MPR = 0.005-0.09, Pj /p = 0.6-19.0, Tj/T = 1.0-13.6, y 1.4 and 1.67, and Peb /P =0.19-6.15 (over, perfectly and underexpanded). Injection temperature had a small effect on the boundary layer separation distance. The effective backpressure was an accurate indicator of the jet flow condition. The interaction force increased almost linearly with increasing MPR. The amplification factor was inversely proportional to MPR. In general, the turbulence levels formed three distinct regions across the plume. Region 1 was defined as the upper region of the plume where the turbulence levels were moderate. Region 2 was the high turbulent level region located along the lower portion of the plume near the missile fuselage. Region 3 was the relatively low turbulence region along the plume core, where in the upper half, the turbulence levels were very low, and moving down towards the missile fuselage, the levels increased to those in region 2. The present data suggest a qualitative correlation between the shear strain rate field and the turbulence across the plume.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 31, 2002
- Accession Number
- ADA410909
Entities
People
- Rodney D W Bowersox
Organizations
- University of Alabama