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Spectral measurements of hypervelocity flow in an expansion tunnel
Yuan CK(苑朝凯); Zhou K(周凯); Liu YF(刘云峰); Hu ZM(胡宗民); Jiang ZL(姜宗林)

Atmospheric reentry vehicles and planetary probes fly through the atmosphere at hypervelocity speed. At such speed, there is a significant proportion of heat load to the vehicle surface due to radiative heating. Accurate prediction needs a good knowledge of the radiation spectrum properties. In this paper, a high-speed camera and spectrograph coupled to an intensified charge-coupled device have been implemented to investigate the radiation flow over a semi-cylinder model. The experiments were carried out in the JF16 expansion tunnel with secondary shock velocity of 7.9kms(-1). Results show that the emission spectrum comprises several atomic lines and molecular band systems. We give detailed data of the radiation spectrum, shock shape, shock detached distance and radiation intensity varying with space and wavelength. This valuable experimental dataset will be helpful to validate computational fluid dynamics codes and radiation models, which equates to increased prediction accuracy of radiation heating. Also, some suggestions for spectral measurement in hypervelocity flow field were list in the end.

KeywordSpectral measurement Hypervelocity flow Radiation Expansion tunnel
Indexed BySCI ; EI ; CSCD
WOS IDWOS:000457970100003
WOS Research AreaEngineering, Mechanical ; Mechanics
WOS SubjectEngineering ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [11602275, 11672308, 11672312, 11532014]
ContributorYuan, CK
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.{Yuan, CK、Liu, YF、Hu, ZM、Jiang, ZL} Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
2.{Yuan, CK、Liu, YF、Hu, ZM、Jiang, ZL} Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.{Zhou, K} China Acad Aerosp Aerodynam, Beijing 100074, Peoples R China
Recommended Citation
GB/T 7714
Yuan CK,Zhou K,Liu YF,et al. Spectral measurements of hypervelocity flow in an expansion tunnel[J]. ACTA MECHANICA SINICA,2019,35(1):24-31.
APA Yuan CK,Zhou K,Liu YF,Hu ZM,&Jiang ZL.(2019).Spectral measurements of hypervelocity flow in an expansion tunnel.ACTA MECHANICA SINICA,35(1),24-31.
MLA Yuan CK,et al."Spectral measurements of hypervelocity flow in an expansion tunnel".ACTA MECHANICA SINICA 35.1(2019):24-31.
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