当前位置: X-MOL 学术Powder Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Novel designs for square cyclone using rounded corner and double-inverted cones shapes
Powder Technology ( IF 5.2 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.powtec.2020.11.034
Hossein Fatahian , Esmaeel Fatahian , Majid Eshagh Nimvari , Goodarz Ahmadi

Abstract The main aim of the present study was to develop novel designs for conventional square cyclones in order to improve their separation efficiency using Computational Fluid Dynamics (CFD). Two novel design alterations were considered, and their performances were analyzed. First, the conical section of the conventional square cyclone was changed from single-cone to double inverted-cone. Second, the sharp corners of the main body were modified to rounded corners with different radiuses together with the use of the double inverted-cone. The results demonstrated that due to a smaller separation zone and higher particle concentration in the second lower cone, the square cyclone with rounded-corner and double-inverted cone produces higher separation efficiency among all simulated square cyclones under the same condition. Increasing the value of round corner (r/D) accelerated the flow inside the cyclone and led to a higher tangential velocity. Hence, a more intense centrifugal force field in the square cyclone was observed compared to single-cone square cyclone, and therefore, an improved collection efficiency was obtained. The performance of different cyclones for combined energy loss and collection efficiency was studied. A comparison of 50% cut-off diameters of different cyclones was presented, which revealed that the square cyclone with rounded-corner (r/D = 0.1), and double-inverted cone had the smallest 50% cut-off diameters for all considered pressure drops. The maximum 39.2% reduction of 50% cut-off diameter was obtained for this cyclone compared to the standard square cyclone.

中文翻译:

使用圆角和双倒锥形状的方形旋风器的新颖设计

摘要 本研究的主要目的是为传统的方形旋流器开发新颖的设计,以使用计算流体动力学 (CFD) 提高其分离效率。考虑了两种新颖的设计变更,并分析了它们的性能。首先,将传统方形旋流器的锥形截面由单锥改为双倒锥。其次,将主体的尖角修改为不同半径的圆角,并使用双倒锥。结果表明,由于第二个下锥体的分离区更小,颗粒浓度更高,在相同条件下,圆角和双倒锥的方形旋风器在所有模拟方形旋风器中产生更高的分离效率。增加圆角 (r/D) 的值会加速旋流器内部的流动并导致更高的切向速度。因此,与单锥方形旋流器相比,方形旋流器中观察到的离心力场更强,因此获得了更高的收集效率。研究了不同旋风分离器的综合能量损失和收集效率的性能。比较了不同旋风分离器的 50% 截断直径,结果表明带有圆角 (r/D = 0.1) 和双倒锥的方形旋流器的 50% 截断直径最小压力下降。与标准方形旋风分离器相比,该旋风分离器的 50% 截断直径最大减少了 39.2%。
更新日期:2021-03-01
down
wechat
bug