Gaseous Radiation in Hypersonic Stagnation Point Flow
Abstract
In this research the non-equilibrium flow regimes in the shock tube flow over blunt bodies are being identified by measurements of stagnation point radiation. Spectral measurements of light intensity are being made to assess the contribution of radiation to the stagnation point heating of blunt bodies. Measurements with different model sizes are being performed to qualitatively describe the radiation intensity profile behind the bow shock. The information obtained may enable identification of the predominant equilibrium radiators in shock tube flows. The assessment of radiant heat transfer to bodies entering the earth's atmosphere at hypersonic speeds presents many difficulties, one of which concerns the uncertainty about the range of flow regimes in which reentry can be simulated in a shock tube. Specifically, measurements of gaseous radiation in shock tube flows can be used to predict the radiant heat transfer to an actual vehicle if the flow is in equilibrium and the actual temperatures and densities are duplicated. Under such conditions, the body geometry and size are the governing factors is scaling model results. On the other hand, where the shock tube flow is not in equilibrium, scaling of the results is difficult, if not impossible.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1964
- Accession Number
- AD0428691
Entities
People
- Imants Reba
Organizations
- IIT Research Institute