Design and Testing of a Chemical Injection System for Reentry Plasma Alleviation
John F. Lennon
Jan 1974 · Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force
Ebook
48
Pages
About this ebook
The effect of injecting an electrophilic liquid into the ionized flow field surrounding a reentry vehicle was observed during the flight of a trailblazer 2 on 28 July 1972. The report describes the rationale used to initially screen candidate additives and the experimental evaluation that finally resulted in the selection of Freon 114B2 for operational use. Injection system design and preliminary testing are discussed, and the predicted and actual performance during flight are compared. Data from on-board antennas and electrostatic probes confirmed that the additive reduced the electron density and improved transmission. A number of factors characterizing the injection are presented as a basis for analyzing the flow-additive interaction. (Author).
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