• Title/Summary/Keyword: 비드반경

Search Result 2, Processing Time 0.027 seconds

A study on the drawing characteristics of circular drawbead by the Finite Element Method (유한요소법에 의한 원형드로오비드의 인출특성에 관한 연구)

  • 신양호
    • Journal of the Korean Society of Manufacturing Technology Engineers
    • /
    • v.6 no.3
    • /
    • pp.26-35
    • /
    • 1997
  • In this study, the drawing characteristics of circular drawbead are examined with the plane strain elastic-plastic FE Method. Both the clamping load and the drawing load investigated by varying the process variables such as drawbead radius, closing depth and friction condition. The effective strain induced by the draw bead is also investigated. In order to verify the results, the computed results are compared with the existing experimental results. It has been found that both the clamping load and drawing loads are related with the geometry of the bead rather than the lubrication conditions.

  • PDF

Characteristics of the Bioreactors of Hydrogen-producing Immobilized Cells (II) -Overall Effectiveness Factor in Continuous Reactors- (수소생산 고정화 생물 반응기의 특성(II) -연속 반응기에서의 총괄 효율인자 -)

  • 이명재;선용호;한정우;조영일
    • Microbiology and Biotechnology Letters
    • /
    • v.16 no.6
    • /
    • pp.510-516
    • /
    • 1988
  • The effects of input substrate concentration and dilution rate on mass transfer resistance in the operation of immobilized cell reactors were investigated using Rhodospirillum rubrum KS-301 immobilized by Ca alginate as reactor element and glucose as growth-limiting substrate. The kinetic parameters were obtained to estimate effectiveness factors. In the packed-bed reactor, internal mass transfer resistance was predominating although external resistance could not be neglected. The overall effectiveness factor was decreased with increase of dilution rate. In the continuous stirred-tank reactor, external resistance was nearly neglected and the overall effectiveness factor was not affected by dilution rate. In this experiment the overall effectiveness factors in PBR and CSTR were estimated to be 0.70 and 0.71 at D$_{i}$ = 0.2/h, R = 0.15 cm, and S$_{i}$ : 1.0g/L, respectively.

  • PDF