Heat transfer characteristics in a horizontal swirling fluidized bed
Heat transfer characteristics in a horizontal swirling fluidized bed
复制标题
水平旋流流化床传热特性
DOI：
10.1016/j.expthermflusci.2011.03.007
复制
发表时间：
2011-09
影响因子：
3.2
通讯作者：
马成果
中科院分区：
文献类型：
--
作者：
卢平;曹晏;潘伟平;马成果
设计了一种新型的水平旋流流化床（HSFB），该流化床在布风器中心设置了矩形挡板，在流化床的每个角落都设置了三层水平二次风喷嘴。在冷态HSFB试验模型上进行了传热特性试验。利用快速响应换热探头测量了HSBF中浸入管与床层材料之间的换热系数。深入研究了流态化速度、床层物料粒度、测量高度、探针取向、二次空气注入等因素对传热系数的影响。试验结果表明，传热系数随流化速度的增加而增大，在最小流化速度的1.5 ~ 3倍时达到最大值。传热系数沿探头圆周变化，探头背风面传热系数大于迎风面传热系数。传热系数随测量高度的增加而减小；纵向探针的传热系数大于横向探针的传热系数。适当的二次空气注入量和床层物料的粒度可以在致密区产生良好的流体力学，增强HSFB内的传热。
An innovative horizontal swirling fluidized bed (HSFB) with a rectangular baffle in the center of an air distributor and three layers of horizontal secondary air nozzles located at each corner of fluidized bed was developed. Experiments on heat transfer characteristics were conducted in a cold HSFB test model. Heat transfer coefficients between immersed tubes and bed materials in the HSBF were measured with the help of a fast response heat transfer probe. The influences of fluidization velocity, particle size of bed materials, measurement height, probe orientation, and secondary air injection, etc. on heat transfer coefficients were intensively investigated. Test results indicated that heat transfer coefficients increase with fluidization velocity, and reach their maximum values at 1.5–3 times of the minimum fluidization velocity. Heat transfer coefficients are variated along the circumference of the probe, and heat transfer coefficients on the leeward side of the probe are larger than that on the windward side of the probe. Heat transfer coefficients decrease with increasing of measurement height; heat transfer coefficients of the longitudinal probe are larger than that of the transverse probe. The proper secondary air injection and particle size of bed materials can generate a preferred hydrodynamics in the dense zone and enhance heat transfer in a HSFB.
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DOI：
10.1007/978-94-011-5842-8
发表时间：
1997-10
期刊：
--
影响因子：
--
作者：
O. Molerus;Karl-Ernst Wirth
通讯作者：
O. Molerus;Karl-Ernst Wirth
影响因子：
15.1
作者：
Hanning Li;A. Prakash
通讯作者：
Hanning Li;A. Prakash
影响因子：
5.3
作者：
Chan-Gi Lee;Yong-June Cho;P. Song;Yong Kang;Junsik Kim;Myoung-Jae Choi
通讯作者：
Chan-Gi Lee;Yong-June Cho;P. Song;Yong Kang;Junsik Kim;Myoung-Jae Choi
DOI：
10.1615/ihtc9.1980
发表时间：
1990
期刊：
--
影响因子：
--
作者：
J. Grace
通讯作者：
J. Grace
DOI：
--
发表时间：
1990
期刊：
--
影响因子：
--
作者：
B. Leckner
通讯作者：
B. Leckner