대한기계학회논문집 (Transactions of the Korean Society of Mechanical Engineers)
- 제5권4호
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- Pages.257-265
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- 1981
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- 1225-5963(pISSN)
DOI QR Code
풍동을 이용한 밸브제트에서 난류제트 유동고찰
Investigation on the tunulent flow of the valve jet experimented using a wind tunnel
- 노병준 (정회원, 전북대학교 공과대학) ;
- 발행 : 1981.11.01
초록
A modified subsonic wind tunnel was employed to investigate the turbulent flow of a valve jet. To effectuate this experimental study, an actual valve and valve seat of a diesel engine were equipped at its outlet (ref. Fig. 3) Theoretically, using the equation of motion of Navier-Stokes in the chlindrical coordinates, the turbulent equation of motion for the incompressible fluid was derived with three assumptions; steady flow (.delta./.delta.t=0), axisymmetry and revolutionary homogeneity(.delta./.delta..phi.=0), no ensemble revolution (V.iden.0). Experimentally, mean and fluctuation velocities have been measured in the redial direction. With a assumption of a non-dimensional velocity distribution equation, a sami-emperical similarity profile equation of the jet flow have been derived, whose empirical constants were deterimed graphically with the data obtained.
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