Large-Bandwidth Phase-Locked Measurements for High-Speed Flow Experiments with Controlled Disturbance Inputs
Abstract
The purpose of the present work is to develop an experimental apparatus that will enable us to accurately detect, and then measure, the phase-locked interactions that occur in high-speed flows. In particular, we examine the structure of the shockwave/boundary layer interaction induced by an unswept compression ramp flow in the Supersonic Low Disturbance Wind Tunnel at the NASA Langley Research Center. SLDT has a unique capability for generating a very low disturbance environment with a free-stream noise level that is at least an order of magnitude lower than in conventional facilities. This low level of natural free-stream disturbances is advantageous for the generation of controlled free-stream disturbances with an acoustic generator. Measurement of the fluctuating density gradients are performed using a focusing schlieren deflectometer, which is a promising technique for large-bandwidth, phase-locked measurements in high-speed flows.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2005
- Accession Number
- ADA448110
Entities
People
- Ndaona Chokani
Organizations
- Duke University