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Influence of state-to-state transport coefficients on surface heat transfer in hypersonic flows. / Josyula, Eswar; Burt, Jonathan M.; Kustova, Elena; Vedula, Prakash.

AIAA SciTech, 52nd Aerospace Sciences Meeting,National Harbor, Maryland, 13-17 January 2014. The American Institute of Aeronautics and Astronautics, 2014. p. Code 105770.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Harvard

Josyula, E, Burt, JM, Kustova, E & Vedula, P 2014, Influence of state-to-state transport coefficients on surface heat transfer in hypersonic flows. in AIAA SciTech, 52nd Aerospace Sciences Meeting,National Harbor, Maryland, 13-17 January 2014. The American Institute of Aeronautics and Astronautics, pp. Code 105770, 52nd Aerospace Sciences Meeting 2014, National Harbor, United States, 13/01/14. https://doi.org/10.2514/6.2014-0864

APA

Josyula, E., Burt, J. M., Kustova, E., & Vedula, P. (2014). Influence of state-to-state transport coefficients on surface heat transfer in hypersonic flows. In AIAA SciTech, 52nd Aerospace Sciences Meeting,National Harbor, Maryland, 13-17 January 2014 (pp. Code 105770). The American Institute of Aeronautics and Astronautics. https://doi.org/10.2514/6.2014-0864

Vancouver

Josyula E, Burt JM, Kustova E, Vedula P. Influence of state-to-state transport coefficients on surface heat transfer in hypersonic flows. In AIAA SciTech, 52nd Aerospace Sciences Meeting,National Harbor, Maryland, 13-17 January 2014. The American Institute of Aeronautics and Astronautics. 2014. p. Code 105770 https://doi.org/10.2514/6.2014-0864

Author

Josyula, Eswar ; Burt, Jonathan M. ; Kustova, Elena ; Vedula, Prakash. / Influence of state-to-state transport coefficients on surface heat transfer in hypersonic flows. AIAA SciTech, 52nd Aerospace Sciences Meeting,National Harbor, Maryland, 13-17 January 2014. The American Institute of Aeronautics and Astronautics, 2014. pp. Code 105770

BibTeX

@inproceedings{b5da0ee509ca4ecfafb5074a80dcac12,
title = "Influence of state-to-state transport coefficients on surface heat transfer in hypersonic flows",
abstract = "A numerical study is performed to assess the influence of two state-to-state kinetic approaches on the prediction of surface heat transfer of Mach 7 hypersonic external flow fields. One approach consists of a simplified state-to-state kinetic model which utilizes Eucken{\textquoteright}s relation for calculating thermal conductivity and a constant Lewis number assumption for calculating self-diffusion in the vibrational quantum levels. The other approach uses a rigorous kinetic theory based model for which collision integrals are used to determine transport coefficients related to thermal diffusion, heat conductivity, self-diffusion, and diffusion of vibrational energy. Inclusion of self-diffusion results in an increase in the surface heat flux of up to 6.5% upstream of a shoulder region. Thermal conductivity is found to be the primary contributor to surface heat flux. The differences in heat flux predictions between the two state kinetic models highlight the sensitivity of surface heat transfer rate to the thermal conductivity models used. As a starting point for future determination of transport coefficient model sensitivities, a probabilistic global sensitivity analysis is performed for a simplified set of hypersonic flow calculations involving the Sutherland viscosity model.",
author = "Eswar Josyula and Burt, {Jonathan M.} and Elena Kustova and Prakash Vedula",
year = "2014",
month = jan,
day = "1",
doi = "10.2514/6.2014-0864",
language = "English",
isbn = "9781624102561",
pages = "Code 105770",
booktitle = "AIAA SciTech, 52nd Aerospace Sciences Meeting,National Harbor, Maryland, 13-17 January 2014",
publisher = "The American Institute of Aeronautics and Astronautics",
address = "United States",
note = "52nd Aerospace Sciences Meeting 2014 ; Conference date: 13-01-2014 Through 17-01-2014",

}

RIS

TY - GEN

T1 - Influence of state-to-state transport coefficients on surface heat transfer in hypersonic flows

AU - Josyula, Eswar

AU - Burt, Jonathan M.

AU - Kustova, Elena

AU - Vedula, Prakash

PY - 2014/1/1

Y1 - 2014/1/1

N2 - A numerical study is performed to assess the influence of two state-to-state kinetic approaches on the prediction of surface heat transfer of Mach 7 hypersonic external flow fields. One approach consists of a simplified state-to-state kinetic model which utilizes Eucken’s relation for calculating thermal conductivity and a constant Lewis number assumption for calculating self-diffusion in the vibrational quantum levels. The other approach uses a rigorous kinetic theory based model for which collision integrals are used to determine transport coefficients related to thermal diffusion, heat conductivity, self-diffusion, and diffusion of vibrational energy. Inclusion of self-diffusion results in an increase in the surface heat flux of up to 6.5% upstream of a shoulder region. Thermal conductivity is found to be the primary contributor to surface heat flux. The differences in heat flux predictions between the two state kinetic models highlight the sensitivity of surface heat transfer rate to the thermal conductivity models used. As a starting point for future determination of transport coefficient model sensitivities, a probabilistic global sensitivity analysis is performed for a simplified set of hypersonic flow calculations involving the Sutherland viscosity model.

AB - A numerical study is performed to assess the influence of two state-to-state kinetic approaches on the prediction of surface heat transfer of Mach 7 hypersonic external flow fields. One approach consists of a simplified state-to-state kinetic model which utilizes Eucken’s relation for calculating thermal conductivity and a constant Lewis number assumption for calculating self-diffusion in the vibrational quantum levels. The other approach uses a rigorous kinetic theory based model for which collision integrals are used to determine transport coefficients related to thermal diffusion, heat conductivity, self-diffusion, and diffusion of vibrational energy. Inclusion of self-diffusion results in an increase in the surface heat flux of up to 6.5% upstream of a shoulder region. Thermal conductivity is found to be the primary contributor to surface heat flux. The differences in heat flux predictions between the two state kinetic models highlight the sensitivity of surface heat transfer rate to the thermal conductivity models used. As a starting point for future determination of transport coefficient model sensitivities, a probabilistic global sensitivity analysis is performed for a simplified set of hypersonic flow calculations involving the Sutherland viscosity model.

UR - http://www.scopus.com/inward/record.url?scp=84938309648&partnerID=8YFLogxK

U2 - 10.2514/6.2014-0864

DO - 10.2514/6.2014-0864

M3 - Conference contribution

SN - 9781624102561

SP - Code 105770

BT - AIAA SciTech, 52nd Aerospace Sciences Meeting,National Harbor, Maryland, 13-17 January 2014

PB - The American Institute of Aeronautics and Astronautics

T2 - 52nd Aerospace Sciences Meeting 2014

Y2 - 13 January 2014 through 17 January 2014

ER -

ID: 6994439