繊維懸濁液の流動特性に関する研究 : 第3報,濃度むらに対する流路形状の影響

概要

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Pulp suspension flow is characterized by a complicated relationship between fiber flocculation and turbulence intensity. The object of this study is to clarify the influences of duct construction on the flow, and to develop a high-consistency paper-forming headbox. Optical measurements were carried out to investigate the extent of dispersion in the pulp suspension flow in a duct having various turbulence generating elements. The results are as follows : (1) Both dispersion and reflocculation were remarkable in the duct flow with an orifice which is a strong turbulence generator. (2) The saw-blade-type duct flow indicated a higher dispersion rate and mild reflocculation, and therefore is suitable as the element of a paper machine headbox. (3) The power spectra of the flocculation signal suggest that the dispersion and reflocculation of a suspension is related to the turbulence scale characterized by the flowing duct dimension.
一般社団法人日本機械学会の論文
1988-04-25