Simulation of radiation generated by chemical reactions in weakly ionized shock waves using DSMC

Tong Zhu, Zheng Liy, Deborah A. Levin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, we simulate the radiation from the NO and N+2systems and compare with the shock tube experiments in air by Gorelov.1The related shock speeds are high enough to have produced a peak translational temperature of˜20,000 K or even higher, providing enough energy to ionize some of the ow species. In the current work, we simulate ionized normal shock ows by implementing appropriate ionization models in a 11 species air (N, O, N2, O2, NO, N+, O+, N+2, O+2, NO+and e-) in DSMC. Electron impact and heavy particle impact excitation for NO is studied using the Quasi-Steady-State (QSS) approximation to compute the NO(A2Σ+) and the N+2(B2Σ+u) state number densities. Line-by-line calculation of the spectra is performed using the NEQAIR2 code to obtain radiation in the wavelength range ofλ= 235±7 and 391:4±0:2 nm. For shock speeds above 7 km/s, the currently calculated radiation are in better agreement with the experimental data than that in our eariler work,3 but are still about 2~6 times lower than the experiments. For the N+2radiation good agreement with the experimental data is obtained for shock speeds above 9 km/s.

Original languageEnglish (US)
Title of host publication52nd Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624102561
StatePublished - Jan 1 2014
Externally publishedYes
Event52nd Aerospace Sciences Meeting 2014 - National Harbor, United States
Duration: Jan 13 2014Jan 17 2014

Publication series

Name52nd Aerospace Sciences Meeting

Other

Other52nd Aerospace Sciences Meeting 2014
CountryUnited States
CityNational Harbor
Period1/13/141/17/14

Fingerprint

Shock waves
Chemical reactions
Radiation
Shock tubes
Air
Ionization
Experiments
Wavelength
Electrons
Temperature

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Zhu, T., Liy, Z., & Levin, D. A. (2014). Simulation of radiation generated by chemical reactions in weakly ionized shock waves using DSMC. In 52nd Aerospace Sciences Meeting (52nd Aerospace Sciences Meeting). American Institute of Aeronautics and Astronautics Inc..

Simulation of radiation generated by chemical reactions in weakly ionized shock waves using DSMC. / Zhu, Tong; Liy, Zheng; Levin, Deborah A.

52nd Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics Inc., 2014. (52nd Aerospace Sciences Meeting).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zhu, T, Liy, Z & Levin, DA 2014, Simulation of radiation generated by chemical reactions in weakly ionized shock waves using DSMC. in 52nd Aerospace Sciences Meeting. 52nd Aerospace Sciences Meeting, American Institute of Aeronautics and Astronautics Inc., 52nd Aerospace Sciences Meeting 2014, National Harbor, United States, 1/13/14.
Zhu T, Liy Z, Levin DA. Simulation of radiation generated by chemical reactions in weakly ionized shock waves using DSMC. In 52nd Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics Inc. 2014. (52nd Aerospace Sciences Meeting).
Zhu, Tong ; Liy, Zheng ; Levin, Deborah A. / Simulation of radiation generated by chemical reactions in weakly ionized shock waves using DSMC. 52nd Aerospace Sciences Meeting. American Institute of Aeronautics and Astronautics Inc., 2014. (52nd Aerospace Sciences Meeting).
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