Ballistic Range Experimental Results of Radiating Wakes of Spheres at Mach 10

Authors

• Robert B. MacDermott, Air Force Institute of TechnologyFollow
• Nicholas Mueschke, Southwest Research Institute
• Niabo Jiang, Spectral Energies, LLC
• Paul S. Hsu, Spectral Energies, LLC
• Sukesh Roy, Spectral Energies, LLC

Document Type

Article

Publication Date

6-1-2025

Abstract

The hypersonic flow field can experience significant thermochemical nonequilibrium effects. However, very little ground test data exist for nonequilibrium hypersonic wake flows. Simulating air chemistry in nonequilibrium is highly challenging due to the lack of validation data. To address a lack of validation data, ballistic free flight tests were conducted to examine nonequilibrium chemistry effects in the wake of 25 mm spheres at Mach 10. A laser-based diagnostic system was used to measure naturally produced nitric oxide (NO) concentrations. Measurements were made up to 53 body diameters behind the sphere. NO concentrations in the wake peaked between 4.1% ± 0.8% and 6.8% ± 1.3%.

Comments

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The "Link to Full Text" on this page opens or downloads the accepted manuscript (postprint) of  the work, provided through the CHORUS program, and hosted at the Optica website.

A 12-month embargo was observed for posting the accepted manuscript.

DOI

10.1364/AO.546959

Source Publication

Applied Optics (ISSN 1559-128X | eISSN 2155-3165)

Recommended Citation

Robert B. MacDermott, Nicholas J. Mueschke, Naibo Jiang, Paul S. Hsu, and Sukesh Roy, "Ballistic range experimental results of radiating wakes of spheres at Mach 10," Appl. Opt. 64, D59-D68 (2025)