Effect of rotational nonequilibrium behind a normal shock wave in oxygen and nitrogen flow. (1st October 2020)

• Record Type: Journal Article
• Authors: Ghezali, Y.; Haoui, R.; Chpoun, A.
• Is Part Of: Thermal science and engineering progress. Volume 19(2020)
• Publication Date: 2020-10-01
• Subjects: Hypersonic -- Nonequilibrium -- Shock wave -- Rotation -- Vibration -- Ionization; Heat engineering -- Periodicals; Heat engineering; Thermodynamics; Periodicals; 621.402
• DOI: 10.1016/j.tsep.2020.100601
• Languages: English
• ISSNs: 2451-9049

Abstract

Highlights: Three-temperature model was used. The Park89 chemical model gives satisfactory results for both oxygen and nitrogen flow. Rotational nonequilibrium increases the relaxation zone. Abstract: In this study, the effect of rotational nonequilibrium on the macroscopic parameters of the flow behind a normal shock wave in oxygen and nitrogen gas flow has been examined. Comparison between three chemical kinetic models including Park89, Park93, and Dunn-Kang was used to describe the chemical nonequilibrium. The obtained results show the significant effect of the rotational nonequilibrium on the relaxation zone and also on the translational and vibrational temperatures and were found to be in a good agreement with the experimental data particularly when the Park89 model was used.