An Experimental Study on Particle Behavior and Heat Transfer Characteristics around Horizontal Tube Bundle in Fluidized Beds.

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  • 流動層内水平円管群周りの粒子挙動と熱伝達特性の実験的研究
  • リュウドウソウナイ スイヘイ エンカングン マワリ ノ リュウシ キョドウ ト

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Abstract

The instantaneous heat transfer coefficient, particle volume fraction and particle velocity around a tube immersed in a fluidized bed were simultaneously measured, using glass beads with average diameter of 0.42mm and 1mm as fluidized particles. The measured results were analyzed by the conditional averaging method, distinguishing particle contact from no particle contact. The relationship between the local average heat transfer coefficient and the particle volume fraction during particle contact, on the lower side surface of the tube for the 0.42mm particles and on the entire tube surface for the 1mm particles, is consistent with Kunii's large particle model.

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