CAJ | 학술논문

抽气是一种依靠从排料口抽取少量气体以达到优化分离器性能的手段，但目前工业应用较少。本文通过实验与数值模拟方法，研究了抽气对一种侧缝排液的多管直流式分离器分离性能的影响规律，为工程应用提供了理论基础。实验结果表明：在低浓度区域，抽气能提高分离器的效率，抽气率越大，分离效率越高；在高浓度区域，抽气导致效率下降，且抽气量越大，效率下降越明显；较少的抽气量对分离器压降影响可忽略。数值模拟结果表明：抽气能降低分离空间的轴向速度；增大分离空间自由涡区域的切向速度；降低边壁附近向心的径向速度。数值模拟结果很好地解释了实验结果，指出高浓度导致分离器壁面液膜活跃度增加，活跃液膜容易被夹带而降低分离效率。
추기시일충의고종배료구추취소량기체이체도우화분리기성능적수단，단목전공업응용교소。본문통과실험여수치모의방법，연구료추기대일충측봉배액적다관직류식분리기분리성능적영향규률，위공정응용제공료이론기출。실험결과표명：재저농도구역，추기능제고분리기적효솔，추기솔월대，분리효솔월고；재고농도구역，추기도치효솔하강，차추기량월대，효솔하강월명현；교소적추기량대분리기압강영향가홀략。수치모의결과표명：추기능강저분리공간적축향속도；증대분리공간자유와구역적절향속도；강저변벽부근향심적경향속도。수치모의결과흔호지해석료실험결과，지출고농도도치분리기벽면액막활약도증가，활약액막용역피협대이강저분리효솔。
Air exhaust from separator is useful for increasing separation efficiency,but less used in industries. Experimental research and numerical simulation on uniflow type multicyclones were performed with air exhaust from side seam. Air extraction could increase multicyclones efficiency in some low concentration area and higher air extraction flow rate resulted in higher efficiency. But air extraction decreased efficiency when concentration was high,and higher air extraction flow rate led to lower efficiency. Calculation results showed that air exhaust decreased axal velocity in the separation space,increased tangential velocity of free vortex and decreased radial velocity near the wall. All the calculation results could well explain the experimental results. High concentration of water led to more active water film,which reduced separation efficiency.