Experimental Study of Dynamic Stability for a Entry Capsule in Supersonic Flow

Due to the lack of existence of control surfaces in entry capsules, the subject of static and dynamic stability is always important. In this paper, these coefficients are investigated experimentally for the case of forced oscillation at supersonic flow. In this experimental study, the effects of fre...

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Bibliographic Details
Published inفصلنامه علوم و فناوری فضایی Vol. 15; no. 2; pp. 71 - 80
Main Authors Mohsen Sargolzaie, Hamid Fazeli, Mohammadreza Soltani
Format Journal Article
LanguageEnglish
Persian
Published Aerospace Research Institute 22.06.2022
Subjects
dynamic stability
entry capsule
experimental aerodynamic
supersonic flow
unsteady aerodynamic
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Summary:Due to the lack of existence of control surfaces in entry capsules, the subject of static and dynamic stability is always important. In this paper, these coefficients are investigated experimentally for the case of forced oscillation at supersonic flow. In this experimental study, the effects of freestream Mach number, mean attack angle and pitch frequency on dynamic stability coefficients were evaluated. According to the results, in Mach 1.8, the geometry starts to be dynamically unstable. One approach to overcome this problem is to change the average attack of angle of the model. This change in the mean attack of angle, similar to the results presented for the five-degree mean angle, will lead to dynamic stability.
ISSN:2008-4560
2423-4516
DOI:10.30699/jsst.2022.1299