Improvement of a three-band radiation model for application to chemical nonequilibrium flows

Naoya Hirata; Masataka Yamada; Hisashi Kihara; Ken Ichi Abe; Yusuke Takahashi

doi:10.2514/1.T4130

Improvement of a three-band radiation model for application to chemical nonequilibrium flows

Naoya Hirata, Masataka Yamada, Hisashi Kihara, Ken Ichi Abe, Yusuke Takahashi

Thermophysics and Fluid Mechanics

Research output: Contribution to journal › Article › peer-review

Abstract

A new strategy to evaluate one important parameter that is used in the radiation model is proposed in order to apply the three-band model to a wider range of flow conditions, including atmospheric entry flows. The proposed model is applied to the reentry conditions of the Hayabusa capsule and its validation. The results obtained generally showed good agreement with those derived by the line-by-line (LBL) method, which is recognized as an accurate method for wavelength integration. In addition, the computational cost of the nonequilibrium three-band model was confirmed to be considerably lower than that of the LBL model. The present nonequilibrium three-band model using the new parameter showed that the prediction accuracy was successfully maintained. The model performance in the region far from the wall was considerably improved when compared with that of the model using a constant value for the parameter.

Original language	English
Pages (from-to)	799-803
Number of pages	5
Journal	Journal of Thermophysics and Heat Transfer
Volume	28
Issue number	4
DOIs	https://doi.org/10.2514/1.T4130
Publication status	Published - Oct 1 2014

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Aerospace Engineering
Mechanical Engineering
Fluid Flow and Transfer Processes
Space and Planetary Science

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10.2514/1.T4130

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title = "Improvement of a three-band radiation model for application to chemical nonequilibrium flows",

abstract = " A new strategy to evaluate one important parameter that is used in the radiation model is proposed in order to apply the three-band model to a wider range of flow conditions, including atmospheric entry flows. The proposed model is applied to the reentry conditions of the Hayabusa capsule and its validation. The results obtained generally showed good agreement with those derived by the line-by-line (LBL) method, which is recognized as an accurate method for wavelength integration. In addition, the computational cost of the nonequilibrium three-band model was confirmed to be considerably lower than that of the LBL model. The present nonequilibrium three-band model using the new parameter showed that the prediction accuracy was successfully maintained. The model performance in the region far from the wall was considerably improved when compared with that of the model using a constant value for the parameter.",

author = "Naoya Hirata and Masataka Yamada and Hisashi Kihara and Abe, {Ken Ichi} and Yusuke Takahashi",

note = "Funding Information: This work was partially supported by a Grant-in-Aid for Scientific Research (grant no. 23560954) sponsored by the Japan Society for the Promotion of Science. The computations were mainly carried out using the computer facilities of the Research Institute for Information Technology of Kyushu University. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",

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doi = "10.2514/1.T4130",

language = "English",

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AU - Hirata, Naoya

AU - Yamada, Masataka

AU - Kihara, Hisashi

AU - Abe, Ken Ichi

AU - Takahashi, Yusuke

N1 - Funding Information: This work was partially supported by a Grant-in-Aid for Scientific Research (grant no. 23560954) sponsored by the Japan Society for the Promotion of Science. The computations were mainly carried out using the computer facilities of the Research Institute for Information Technology of Kyushu University. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2014/10/1

Y1 - 2014/10/1

N2 - A new strategy to evaluate one important parameter that is used in the radiation model is proposed in order to apply the three-band model to a wider range of flow conditions, including atmospheric entry flows. The proposed model is applied to the reentry conditions of the Hayabusa capsule and its validation. The results obtained generally showed good agreement with those derived by the line-by-line (LBL) method, which is recognized as an accurate method for wavelength integration. In addition, the computational cost of the nonequilibrium three-band model was confirmed to be considerably lower than that of the LBL model. The present nonequilibrium three-band model using the new parameter showed that the prediction accuracy was successfully maintained. The model performance in the region far from the wall was considerably improved when compared with that of the model using a constant value for the parameter.

AB - A new strategy to evaluate one important parameter that is used in the radiation model is proposed in order to apply the three-band model to a wider range of flow conditions, including atmospheric entry flows. The proposed model is applied to the reentry conditions of the Hayabusa capsule and its validation. The results obtained generally showed good agreement with those derived by the line-by-line (LBL) method, which is recognized as an accurate method for wavelength integration. In addition, the computational cost of the nonequilibrium three-band model was confirmed to be considerably lower than that of the LBL model. The present nonequilibrium three-band model using the new parameter showed that the prediction accuracy was successfully maintained. The model performance in the region far from the wall was considerably improved when compared with that of the model using a constant value for the parameter.

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Improvement of a three-band radiation model for application to chemical nonequilibrium flows

Abstract

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