한국가시화정보학회지 (Journal of the Korean Society of Visualization)

  • 제17권2호
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  • Pages.58-66
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  • 2019
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  • 1598-8430(pISSN)
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  • 2093-808X(eISSN)
한국가시화정보학회 (The Korean Society of Visualization)
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박판이 부착된 사각노즐에서 분사되는 Sweeping jet의 유동 및 열전달 특성

Heat transfer and flow characteristics of sweeping jet issued from rectangular nozzle with thin plate

  • Kim, Donguk (School of Mechanical Engineering, Pusan National University) ;
  • Jung, Jae Hoon (School of Mechanical Engineering, Pusan National University) ;
  • Seo, Hyunduk (School of Mechanical Engineering, Pusan National University) ;
  • Kim, Hyun Dong (Rolls-Royce University Technology Center, Pusan National University) ;
  • Kim, Kyung Chun (School of Mechanical Engineering, Pusan National University)
  • 투고 : 2019.07.31
  • 심사 : 2019.08.20
  • 발행 : 2019.08.31
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초록

This study investigated heat transfer and flow characteristics of a sweeping jet issued from a rectangular nozzle with a thin plate. A thin vertical aluminum plate was attached on outlet of fluidic oscillator to increase velocity of central area with Coanda effect and enhance heat transfer performance. From visualization and PIV experiments, sweeping jet with a thin plate has larger velocity distribution in center region than that of the normal sweeping jet while oscillating frequency is similar as the normal one. Thermographic phosphor thermometry method was used to visualize the temperature field and Nu distribution of plate with impinging sweeping jet with thin plate. Four Reynolds numbers and three jet-to-wall distances were selected as parameters. It is found that heat transfer performance in the low jet-to-wall spacing was enhanced as the cooled area was expanded. However, when the jet-to-wall spacing became greater than 8dh, heat transfer performance became similar due to reduced impinging velocity.

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참고문헌

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