粒子水含量對迴流強度影響之探討; Effect of Water Content on the Convection strength in a Vibrated Bed

NCUIR > Engineering College > Graduate Institute of Mechanical Engineering > Electronic Thesis & Dissertation > Item 987654321/2295

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/2295

Title:	粒子水含量對迴流強度影響之探討;Effect of Water Content on the Convection strength in a Vibrated Bed
Authors:	江明琦;Chiang-Min Chi
Contributors:	機械工程研究所
Keywords:	振動床;迴流強度;vibrated bed rising velocity;convection strength
Date:	2003-06-17
Issue Date:	2009-09-21 11:43:03 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	摘要本論文運用實驗的方式探討當顆粒體物質水含量增加時，在不同振動條件下其運動情況的改變。研究主題包括不同振動條件配合不同的水含量對迴流運動影響，以及固定水含量對上升時間的影響。本實驗藉由粒子大小分離的原理，利用粒子上升速度來表示顆粒振動床中的迴流運動的強弱大小，實驗首先固定一組振動條件改變粒子水含量，觀察粒子上升速度改變，接著再改變振動條件後觀察粒子上升速度的變化情形，如此一來便觀察到水含量與振動加速度對迴流強度的影響程度。在實驗結果方面發現在某些特定的振動條件下迴流強度會隨著水含量的增加有一段微微上升的趨勢。 It is found that the water content influence the rising velocity of the larger bead.The velocity of the larger bead increase with the addition of a small amount of water .In this case, the small amount of water produces a lubrication effect, resulting from the enhancement of the convection motions of the beads.For the case of large amount of liquid, the water produces the viscous force due to liquid viscosity between the liquid and particles and causes the decrease of the rising velocity of the larger bead.
Appears in Collections:	[Graduate Institute of Mechanical Engineering] Electronic Thesis & Dissertation

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