Study of Non-equilibrium Wakes Model
Abstract
Fundamental ground-based experiments were conducted to investigate radiation produced in the wake of a hypersonic vehicle operating with a heated ablative forebody. Two simple model configurations were investigated - a double compression (double wedge) followed by an expansion, and a single compression (wedge) followed by an expansion. Each model was designed so that a plate could be inserted into the leading surface to facilitate ablation. Plates consisting of unheated aluminium, unheated/heated graphite, and unheated/heated carbon-carbon were investigated. Spectroscopy and high-speed imaging were conducted in each experiment, and calibrated spectral radiances were obtained at multiple locations and over multiple wavelength ranges. The results indicated that ablative products entered the flow when using a heated carbon-carbon plate. This was inferred by the presence of the CN molecule which was detected in flow near the compression surface downstream of the plate (double wedge and single wedge) and in the expansion region beyond the body (single wedge). The tests (70 in total) provide an important database for comparison with current and future numerical simulations of the flow.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 24, 2022
- Accession Number
- AD1171244
Entities
People
- Timothy J McIntyre
Organizations
- University of Queensland