Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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The Effect of Nozzle Diameter on Heat Transfer to a Fully Developed Round Impinging Jet

완전 발달된 원형 충돌제트의 노즐 직경이 열전달에 미치는 영향

  • 이대희 (인제대학교 기계자동차공학부) ;
  • 원세열 (인제대학교 대학원 기계공학과) ;
  • 이영민 (인제대학교 대학원 기계공학과) ;
  • 조헌노 (인제대학교 대학원 기계공학과)
  • Published : 2000.04.01
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Abstract

The effect of nozzle diameter on the local Nusselt number distributions has been investigated for an axisymmetric turbulent jet impinging on the flat plate surface. The flow at the nozzle exit has a fully developed velocity profile. A uniform heat flux boundary condition at the plate surface was created using gold film Intrex. Liquid Crystal was used to measure the plate surface temperature. The experiments were made for the jet Reynolds number (Re) 23,000, the dimensionless nozzle to surface distance (L/d) from 2 to 14, and the nozzle diameter (d) from 1.36 to 3.40 cm. The results show that the Nusselt number at and near the stagnation point increase with an increasing value of the nozzle diameter.

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References

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