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

ASJC Scopus subject areas

  • Aerospace Engineering

Fingerprint Dive into the research topics of 'Simulation of radiation generated by chemical reactions in weakly ionized shock waves using DSMC'. Together they form a unique fingerprint.

  • 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..