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RISS 인기검색어
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- 저자 : Takahiro Kamahara (검색결과 1 건)
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Masaru Sumida,Takahiro Kamahara 한국유체기계학회 2022 International journal of fluid machinery and syste Vol.15 No.3
T his study involved an experimental investigation of the distribution of pulp fiber concentration in t he region behind a partitio n plate with a taper ed trailing edge inserted in a convergen t channel The channel was modeled at the laboratory scale for the dispersio n and rectification components of the headbox passage in a papermaking machine. For t he exp e r iment s the inlet cross se c tional average flow velocity U a , of an actual pulp suspension was in the range of 0.03 3.3 m/s . T he flow was visualized and the fiber concentration distribution was measured. Subsequently, t he effects of the flow velocity on t h e time averaged and fluctu a ting fiber concentration distributions C a and C’ respectively ) in the flow direction were examined through compar i so n s with those in the case s where the plate was installed in the parallel channel or had a simple rectangular e d ge In the convergent chan n el with the taper ed trailing edge, t he fiber concentration def ect behind the plate was reduced abruptly . Moreover, the uniformity of the fiber concentration distribution at the convergence exit did not vary with the flow veloci t y , thereby having a low val u e. Overall, the fundamental observations obtained in this study can contribute to the optimization and improve ment of the headbox channel s of papermaking machine s
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