Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Study on Aerodynamic Loads of a Deploying Wing Launched from a Mobile Platform

이동식 플랫폼에서 발사되는 비행체의 날개 전개 공력 하중에 관한 연구

  • Lee, Younghwan (The 1st Research and Development Institute, Agency for Defense Development)
  • 이영환 (국방과학연구소 제1기술연구본부)
  • Received : 2019.02.14
  • Accepted : 2019.04.12
  • Published : 2019.06.05
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Abstract

In this study, a aerodynamic loads prediction to design a deploying device of folded fin was introduced. In general, resultant flow conditions around the fin are used to obtain deploying moments and required energy. However, when it comes to the air vehicles launched from a mobile platform, more specific flow conditions can be provided. With the conditions, the design criteria can be calculated more realistically. In this study, therefore, aerodynamic moments induced by aerodynamic loads and energy required in deployment were calculated using wind-over-deck(WOD) velocity, combination of a platform velocity and a wind velocity. For the calculation, wind tunnel test was conducted on various angle of attack, side slip angles, and folding angles. It was found that the aerodynamic moments and the energy required in deployment using the non-uniform flow due to the velocity components were less than those using the uniform flow without the components.

Keywords

GSGGBW_2019_v22n3_353_f0001.png 이미지

Fig. 1. Examples of diverse deployment[8-12]

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Fig. 2. Fin deploying motion

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Fig. 3. Wind direction

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Fig. 4. Moment coefficient

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Fig. 5. Schematics for WOD velocity, total angle of attack, and the wing position

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Fig. 6. WOD velocity

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Fig. 7. Deploying moments

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Fig. 8. Deploying energy

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