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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (S2): 106-114.doi: 10.7527/S1000-6893.2022.27723

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Validation of dissociation of CO in CO2 flowfield with flow velocity from 5 to 7 km/s

Dongjun LIAO(), Anhua SHI, Jie HUANG, Hexiang JIAN, Aimin XIE, Zonghao WANG   

  1. Hypervelocity Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China
  • Received:2022-06-30 Revised:2022-07-27 Accepted:2022-08-17 Online:2022-09-01 Published:2022-08-31
  • Contact: Dongjun LIAO E-mail:tigers717@126.com

Abstract:

To validate the deduction that the chemical reaction products change due to the dissociation of CO in flowfield with flow velocity from 5 km/s to 7 km/s in CO2, flowfield spectrum over free-flight spheres in CO2 has been measured in the ballistic range facility of Hypervelocity Aerodynamics Institute, China Aerodynamics Research and Development Center. It is revealed from the test data that the obvious C2 Swan band characteristic spectrum has been observed in CO2 flowfield with flow velocity ranging from about 5 km/s to 7 km/s. The produce of specie C2 is one of the results of the dissociation of specie CO, which validate the deduction of the dissociation of specie CO within the corresponding velocity range. Theromchemical non-equilibrium flowfield and radiation spectrum have been numerical calculated based on the test conditions, which also come to the results that specie C2 has significantly generated. The difference between the reproduced flowfield spectrum and test data is less than approximately one order of magnitude, which further validate the reasonability of the deduction of the dissociation of specie CO.

Key words: non-equilibrium flow, specie, spectral radiation intensity, ballistic range, CO2

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