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利用FLUENT提供的RSM和DPM模型对不同入口高度和宽度的气液旋流分离器进行了数值模拟.结果显示,当增大宽度或高度时切向速度与分离效率减小,但压降降低;当宽度大于环形空间的间隙时,部分进气流量直接作用于排气管上,影响内部流场;减小入口宽度或高度时引起的压降无明显差别,但减小宽度可提高分离效率而高度则相反.入口高度(a)与分离器筒体直径(D)的比值a/D和宽度(b)与分离器筒体直径(D)的比值b/D约为0.2时,压降基本相同,但分离效率相差约3.6%.a/D约为0.38时,分离效率约为95.6%,压降约为340 Pa;而b/D约为0.25时效率为96.3%,压降约为320 Pa,入口宽度对分离器性能的影响比入口高度更显著.
The numerical simulation of gas-liquid cyclone separators with different entrance heights and widths is carried out by using RSM and DPM models provided by FLUENT. The results show that when the width or height is increased, the tangential velocity and separation efficiency decrease but the pressure drop decreases. When the width is larger than the clearance in the annular space, part of the intake air flow acts directly on the exhaust pipe, affecting the internal flow field; there is no significant difference between the pressure drop caused by reducing the inlet width or height, but reducing the width can improve the separation efficiency The height is the opposite and the ratio of the inlet height (a) to the diameter (D) of the separator cylinder a / D and the ratio of the width (b) to the separator cylinder diameter (D), b / D, , But the separation efficiency is about 3.6% .A / D is about 0.38, the separation efficiency is about 95.6% and the pressure drop is about 340 Pa. When b / D is about 0.25, the efficiency is 96.3% and the pressure drop is about 320 Pa, the effect of entry width on separator performance is more pronounced than entry height.