Effects of different cylinder roof structures on the vortex of cyclone separators
Effects of different cylinder roof structures on the vortex of cyclone separators
复制标题
不同筒顶结构对旋风分离器涡流的影响
DOI：
10.1016/j.seppur.2022.121370
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发表时间：
2022
影响因子：
8.6
通讯作者：
Chuang Ye
中科院分区：
文献类型：
--
作者：
Wansong Li;Zhiqiang Huang;Gang Li;Chuang Ye
为改善旋风分离器内部流场，掌握筒顶结构对旋风分离器流场的影响，提高分离效率，开展了不同筒顶结构对旋风分离器旋涡的影响研究。通过数值模拟，气体流动采用雷诺应力模型（RSM）进行了模拟。比较了Q准则和Ω-法捕捉旋风分离器内的旋涡。基于Ω-法，对三种不同筒顶结构的旋风分离器的旋涡和分离效率进行了分析。结果表明，与Q准则相比，Ω-方法捕捉到的是排气管内部非破碎的非等涡面，能够更准确地捕捉旋风分离器内部的旋涡。圆弧形筒顶（ACR）旋风分离器的等涡面比平筒顶（FCR）和楔形筒顶（WCR）旋风分离器的等涡面曲率小、连续性好、畸变小。ACR旋风分离器的涡线和涡量曲线比FCR旋风分离器和WCR旋风分离器的涡线和涡量曲线更规则、均匀和对称。与FCR旋风分离器相比，ACR旋风分离器和WCR旋风分离器内部的切向速度更大。ACR和WCR旋风分离器内的正径向速度在筒锥壁面附近较大。对于ACR和WCR型旋风分离器，在筒体顶部、排气管下端壁外和筒锥壁附近的正轴向速度较大。ACR和WCR旋风分离器内部的流线更加平缓、规则。对于ACR旋风分离器和WCR旋风分离器，筒体顶部气体沿顶部沿着斜向下流动，有助于抑制顶部灰环和短路流，提高分离效率。与FCR旋风分离器相比，ACR旋风分离器和WCR旋风分离器的分离效率分别提高了24.66%和14.06%。研究结果为筒顶结构的改进提供了有益的指导，为改善旋风分离器的流场和分离性能提供了参考。
To improve the internal flow field of a cyclone separator, grasp the effects of the cylinder roof structure on the flow field of the cyclone separator, and improve the separation efficiency, the research on the influence of different cylinder roof structures on the vortex of the cyclone separator was carried out. Through numerical simulations, the gas flow was simulated using the Reynolds stress model (RSM). The vortex of the cyclone separator captured by the Q criterion and Ω-method were compared. Based on the Ω-method, the vortex and separation efficiency of cyclone separators with three different cylinder roof structures were analyzed. The results show that compared with the Q criterion, the Ω-method captures the non-fracturediso-vortex surface inside the exhaust pipe, and can more accurately capture the vortex inside the cyclone. Theiso-vortex surface of an Arc-shaped Cylinder Roof (ACR) cyclone separator has a smaller curvature, better continuity, and less distortion than that of a Flat Cylinder Roof (FCR) cyclone separator and Wedge-shaped Cylinder Roof (WCR) cyclone separator. The vortex lines and vorticity magnitude curves of the ACR cyclone separator are more regular, uniform, and symmetrical than those of the FCR cyclone separator and WCR cyclone separator. Compared with the FCR cyclone separator, the tangential velocity inside the ACR cyclone separator and WCR cyclone separator is greater. The positive radial velocity near the wall of the cylinder cone inside the ACR cyclone separator and WCR cyclone separator is greater. For the ACR cyclone separator and WCR cyclone separator, the positive axial velocity at the top of the cylinders, outside the wall at the lower end of the exhaust pipes, and near the wall of the cylinder cones is greater. The streamlines inside the ACR cyclone separator and WCR cyclone separator are more gentle and regular. For the ACR cyclone separator and WCR cyclone separator, the gas at the top of the cylinders flows obliquely downward along the roofs, which helps to suppress the top ash ring and short-circuit flow and improve the separation efficiency. Compared with the FCR cyclone separator, the separation efficiency of the ACR cyclone separator and WCR cyclone separator is increased by 24.66% and 14.06%, respectively. The research results provide useful guidance for the improvement of the cylinder roof structure and a reference for improving the flow field and separation performance of cyclone separators.
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影响因子：
2.4
作者：
P. Yazdabadi;A. Griffiths;N. Syred
通讯作者：
P. Yazdabadi;A. Griffiths;N. Syred
DOI：
10.1016/j.matpr.2020.11.425
发表时间：
2021
期刊：
Materials Today: Proceedings
影响因子：
--
作者：
N. Prasanna;K. Subramanian;S. Ajay;T. Rajagopal;V. Vigneshwaran
通讯作者：
N. Prasanna;K. Subramanian;S. Ajay;T. Rajagopal;V. Vigneshwaran
影响因子：
8.6
作者：
Zhuwei Gao;Juan Wang;J. Wang;Y. Mao;Yaodong Wei
通讯作者：
Zhuwei Gao;Juan Wang;J. Wang;Y. Mao;Yaodong Wei
影响因子：
4.7
作者：
Zhengliang Liu;Ying Zheng;L. Jia;Jinyu Jiao;Qikai Zhang
通讯作者：
Zhengliang Liu;Ying Zheng;L. Jia;Jinyu Jiao;Qikai Zhang
影响因子：
5.2
作者：
Hideto Yoshida;Kouichiro Ono;K. Fukui
通讯作者：
Hideto Yoshida;Kouichiro Ono;K. Fukui