Evaluation of Electron Quench Additives in a Subsonic Air Arc Channel.
Abstract
The relative effectiveness of electrophilic additives for reduction of high-temperature plasma electron concentration was evaluated by means of experiments conducted in a subsonic air arc channel. Such experiments have application as screening tests for reentry vehicle wake quenchant selection. The flow conditions covered temperatures up to 5000 deg. K at pressures of 30 Torr. Electron number densities were measured. Transit times involved in these experiments were typical of additive transit times encountered in flight vehicle uses. Diagnostic techniques for determination of quench effectiveness are discussed in detail. The test results for a variety of additives including H2O show that, near 3000 deg. K, several fluorine compounds are attractive as potential wake quench candidates. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1968
- Accession Number
- AD0845511
Entities
People
- Keith E. Starner
Organizations
- The Aerospace Corporation