An Electron Beam Excitation Technique for the Measurement of Low Densities in Hypersonic Shock Tunnel Flows,
Abstract
A moderately energetic electron beam (30 kev) is used to induce luminescence from the nitrogen molecules in a high speed gas flow. Local gas density may be measured from observation of the electroluminescent intensity. The method is ideally suited to low density hypersonic flows where, because the gas is so tenuous, the technique proves highly effective compared to shadowgraph or schlieren instrumentation. In the present case the technique was developed for the measurement of density in a hypersonic shock tunnel. The ability to make accurate, quantitative measurements of density is useful in probing a shock tunnel's free stream flow. Also, investigations of the flow in the near wake region of a model may be undertaken using the electron beam. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1963
- Accession Number
- AD0715610
Entities
People
- E. Muntz
- J. Mallin
- R. Zempel
Organizations
- General Electric