• Title/Summary/Keyword: 내부 항력 보정

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An Experimental Study on Internal Drag Correction of High Speed Vehicle Using Three Probes (세 가지 프로브를 이용한 초고속 비행체 내부 항력 보정 기법의 실험적 연구)

  • Jin, Hyeon
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.49 no.7
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    • pp.529-537
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    • 2021
  • Wind tunnel tests were carried out with a scramjet high speed vehicle. Since the scramjet engine does not have a compressor, it has a simple structure, but it is important to design the intake for the supersonic combustion in the combustion chamber. In this study, internal flow characteristics and the starting condition were analyzed by measuring the pressure at the isolator exit just before the combustion chamber, and the intake performance parameters were calculated and compared the result on every Mach number. The aerodynamic characteristics of the flow-through high speed vehicle were analyzed and internal drag correction is required to precisely analyze the aerodynamic characteristics. In this paper, an experimental technique using three probes for internal drag correction was proposed. By applying internal drag correction, it was able to figure out the effect of the internal flow on the aerodynamic force of the vehicle.

A Study on Effective Correction of Internal Drag and Wall Interference Using Response Surface in Wind Tunnel Test (풍동시험에서 반응면을 이용한 내부 항력 및 벽면 효과의 효율적 보정방안 연구)

  • Kim, Junemo;Lee, Yeongbin
    • Journal of the Korea Institute of Military Science and Technology
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    • v.22 no.5
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    • pp.637-643
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    • 2019
  • Wind tunnel testing for flow-through model is necessary for performance prediction of an aircraft with air-breathing jet engine. Internal drag correction and wall correction are performed to acquire preciser wind tunnel test data. Many test runs are generally required to correct internal drag and wall interference in wind tunnel test. In this study we investigated more effective correction schemes using the response surface method. Even though the number of tests required for these schemes was much smaller than that for conventional methods, the differences between corrections using these schemes and conventional methods were similar level with the uncertainty of measurement except for the data near the boundaries.