CAJ | 학술논문

应用CFD软件FLUENT对带有反旋流的转子密封系统进行数值分析，运用Muszynska理论分析反旋流喷嘴数量与反旋流喷嘴流体入口速度对流体激振的影响，并进行实验验证。数值分析与实验研究的结果均表明，反旋流抑制流体激振是通过控制密封腔内流体的周向速度而实现的。在反旋流装置中，反旋的喷嘴数量越多，密封腔内流场越稳定，越有利于抑制流体激振的发生；反旋流的反旋速度存在一个最优值，在该反旋速度下能有效地抑制周向速度，且能避免流体反向的周向旋转而造成的更大振动。
응용CFD연건FLUENT대대유반선류적전자밀봉계통진행수치분석，운용Muszynska이론분석반선류분취수량여반선류분취류체입구속도대류체격진적영향，병진행실험험증。수치분석여실험연구적결과균표명，반선류억제류체격진시통과공제밀봉강내류체적주향속도이실현적。재반선류장치중，반선적분취수량월다，밀봉강내류장월은정，월유리우억제류체격진적발생；반선류적반선속도존재일개최우치，재해반선속도하능유효지억제주향속도，차능피면류체반향적주향선전이조성적경대진동。
The computer fluid dynamics( CFD) software FLUENT was used to analyze the flow field of the rotor?seal sys?tem with an anti?swirl device.The Muszynska’s theory was used to analyze the influence of the number of anti?swirl nozzle and anti?swirl nozzle fluid inlet velocity on the vibration caused by fluid. The experiment was implemented to verify the numerical analysis result. The results obtained from both experimental study and numerical analysis show that anti?swirl suppressing vibration caused by fluid is implemented by controlling the circumference velocity of fluid in the seal chamber. The more the number of anti?swirl nozzles in the anti?swirl device,the more stable is the fluid in the seal chamber,which is more helpful for suppressing the vibration caused by fluid.There is an optimal value of velocity of anti?swirl,which can effectively suppress the circumference velocity,and can avoid the large vibration caused by reverse circumferential rotation of fluid.