한국가시화정보학회지 (Journal of the Korean Society of Visualization)

  • 제21권2호
  • /
  • Pages.55-62
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  • 2023
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  • 1598-8430(pISSN)
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  • 2093-808X(eISSN)
한국가시화정보학회 (The Korean Society of Visualization)
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원형 노즐의 직경 변화 및 표면으로 부터의 거리변화에 따른 오목한 표면에 충돌하는 제트의 온도장 측정 및 CFD해석

Temperature field measurement and CFD analysis of a jet impinging on a concave surface depending on changes in nozzle to surface distance and the diameter of a circular nozzle

  • Yeongmin Jo (School of Mechanical Engineering, PNU) ;
  • Yujin Im (School of Mechanical Engineering, PNU) ;
  • Eunseop Yeom (School of Mechanical Engineering, Pusan National University (PNU))
  • 투고 : 2023.06.28
  • 심사 : 2023.07.20
  • 발행 : 2023.07.31
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초록

The characteristic of jet impinging on the concave surface were analyzed through thermographic phosphor thermometry (TPT) and numerical investigation. Under a jet Reynolds number of 6600, nozzle diameters and nozzle-to-surface distances (H/d) were changed 5mm and 10mm and H/d=2 and 5. The RNG k-ε turbulence model can accurately predict the distribution of Nusselt number, compared to other models (SST k-ω, realizable k-ε). Heat transfer characteristics varied with the nozzle diameter and H/d, with a secondary peak noted at H/d =2, due to vortex-induced flow detachment and reattachment. An increase in nozzle diameter enhanced jet momentum, turbulence strength, and heat transfer.

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과제정보

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임 (No. 2020R1A5A8018822).

참고문헌

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