Preliminary communication

Analysis of the possibility of increasing sting stiffness in the T-38 wind tunnel

Dušan Ćurčić ; Military Technical Institute, Ratka Resanovica 1, 11000 Belgrade, Serbia
Zoran Anastasijević ; Military Technical Institute, Ratka Resanovica 1, 11000 Belgrade, Serbia
Zijah Burzić orcid.org/0000-0002-4759-9853 ; Military Technical Institute, Ratka Resanovica 1, 11000 Belgrade, Serbia
Marija Samardžić ; Military Technical Institute, Ratka Resanovica 1, 11000 Belgrade, Serbia
Slobodan Ilić ; Technical Test Center, Vojvode Stepe 445, 11000 Belgrade, Serbia
Jovan Isaković ; Military Technical Institute, Ratka Resanovica 1, 11000 Belgrade, Serbia
Dragan Marinkovski ; Military Technical Institute, Ratka Resanovica 1, 11000 Belgrade, Serbia

Abstract

Wind tunnel model and sting deflections during experiment in the T-38 wind tunnel have a significant influence on the measurement quality. It is necessary to reduce deflections due to higher accuracy of measurements achievement. High quality stainless steel is already widely used in the T-38 wind tunnel so there is no possibility for further influence to sting stress and deflection level. Based on the great number of performed experiments it is established that sting deflection can be reduced by increasing the sting stiffness. In this paper different material combinations with maraging stainless steel, which is base material for sting manufacturing, are considered. It is necessary to select combination of materials which produces the biggest required stiffness and allowed level of stress in critical sections of the sting.

Keywords

combined sting; composite sting; deflection; stress; wind tunnel

Hrčak ID:

131331

URI

https://hrcak.srce.hr/131331

Publication date:

21.12.2014.

Article data in other languages: croatian

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