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SA0035260.pdf3.15 MB
titleSPRADIAN, Structured Package for Radiation Analysis : Theory and Application
Author(eng)FUJITA, Kazuhisa; ABE, Takashi
Author Affiliation(eng)The Institute of Space and Astronautical Science; The Institute of Space and Astronautical Science
Issue Date1997-09
PublisherInstitute of Space and Astronautical Science
Publication titleThe Institute of Space and Astronautical Science report
Start page1
End page47
Publication date1997-09
AbstractA structured package for radiation analysis, SPRADIAN, is developed and its application is presented. This study is primarily motivated by necessity of a quantitative analysis of severe radiative environment which the MUSES-C capsule encounters during its reentry into the earth atmosphere. In comparison with other radiation programs, much attention is paid to extension of the temperature range up to 100,000 K, detailed treatment of UV and VUV radiation, and flexibility with applications. Incorporated into the programs are the bound-bound, bound-free, and free-free radiation from monoatiomic and diatomic species. The bound-bound radiation is calculated by the line-by-line method, while the others are computed by using corresponding cross-sections which are evaluated by the quantum defect method. Two approximate models are introduced to integration of the radiative heat transfer equation over the shock layer in order to evaluate the radiative heat flux. Accuracy of the program is discussed, and the application to the MUSES-C radiation analysis is presented briefly.
Document TypeDepartmental Bulletin Paper
JAXA Category宇宙科学研究所

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