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풍동장치 내 공기 유동장과 속도 균일도 특성에 대한 분석

A Study on the Characteristics of Air flow Fields with Velocity Uniformity in a Wind Tunnel

  • 투고 : 2018.12.13
  • 심사 : 2018.12.28
  • 발행 : 2018.12.31

초록

Numerical simulations were carried out to analyze the flow characteristics of the wind tunnel. Flow field characteristics with velocity uniformity at the test sections are largely affected by inlet conditions of air flow rate and temperature. Axial average velocity of the flow field inside the test area was almost linearly decreased by 0.026% each 1m. The uniformity distributions of axial velocity showed the highest reduction rate of about 24% between nozzle outlets 1 ~ 2m. In addition, average velocity and the uniformity are increased with air temperature in the wind tunnel due to density variation. The results of this paper are expected to be useful for the basic design of wind tunnel and to be used for efficient design.

키워드

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Fig. 1. Wind tunnel geometry

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Fig. 2. Numerical mesh generation

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Fig. 3. Mean velocity variation with flow rate

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Fig. 4. Pressure distributions

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Fig. 5. Velocity vector distributions

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Fig. 6. Streamline distributions in the test section

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Fig. 7. Axial velocity distributions

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Fig. 8. Uniformity variation with flow rate

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Fig. 9. Air density distributions in the test section

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Fig. 10. Uniformity variation with air temperature

Table 1. Porous media specifications

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참고문헌

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