CAJ | 학술논문

采用流体体积方法分析涡流器离心式喷嘴内部流动过程，采用单反相机和相位多普勒测速仪测量离心式喷嘴、气液同轴双离心式喷嘴的喷雾特性。发现涡流器离心式喷嘴内部流动的总压损失主要发生在涡流器槽道入口、收敛段和等直段。等直段使液膜厚度减小，喷雾锥角减小。离心式喷嘴喷雾粒径分布范围沿径向逐渐增加，轴向速度分布范围沿径向先减小后逐渐增加。气液同轴双离心式喷嘴喷雾特性受气液比影响很大，气液比小时旋流空气使喷雾锥角增加，粒径分布范围减小；气液比大时，气体膨胀压缩喷雾，使大液滴能够到达喷雾中心，喷雾外侧为二次雾化成的细小液滴。
채용류체체적방법분석와류기리심식분취내부류동과정，채용단반상궤화상위다보륵측속의측량리심식분취、기액동축쌍리심식분취적분무특성。발현와류기리심식분취내부류동적총압손실주요발생재와류기조도입구、수렴단화등직단。등직단사액막후도감소，분무추각감소。리심식분취분무립경분포범위연경향축점증가，축향속도분포범위연경향선감소후축점증가。기액동축쌍리심식분취분무특성수기액비영향흔대，기액비소시선류공기사분무추각증가，립경분포범위감소；기액비대시，기체팽창압축분무，사대액적능구도체분무중심，분무외측위이차무화성적세소액적。
The volume of fluid method was used to analyze the flow process in pressure swirl injector.SLR camera and phase doppler anemometry were used to measure the spray characteristics of swirl injector and gas-liquid double swirl coaxial injector.Results show that the total pressure loss occurs mainly in inlet section,convergent section,and columned section of swirler trough.The longer the columned section is,the thicker the liquid film and the smaller the spray cone angle is.The range of spay particle distribution increases gradually along the radial direction while the axial velocity distribution decreases firstly and then increases along radial direction.Spray characteristic of gas-liquid double swirl coaxial injector is greatly influenced by gas-liquid ratio (GLR).While GLR is small enough,swirling air increases the spray cone angle and decreases the range of particle distribution;while GLR is large enough,the expansion of air compresses the spray,pushing large droplets to the center of the spray.And at the edge of spray locates small droplets from second atomization.