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为了研究超高压压缩机管道单独使用孔板能否取得理想的脉动消减效果的问题,阐明了孔板配合缓冲器消减脉动的原理;采用数值模拟软件FLUENT建立了超高压乙烯压缩机出口管道二维非定常流动模型;分别计算了孔板在不同孔径比情况下的脉动状况,并与不加孔板时的情况进行了对比。通过数值模拟表明:单独添加适当尺寸的孔板能起到一定的脉动消减效果,且此效果随孔径比减小而逐渐增强;当孔径比为0.4时,可将压力不均匀度降低至原来的50%左右;当孔径比为0.3时,最多可将压力不均匀度降低至原来的38%。此外,应该注意孔板的阻力作用,并综合考虑后续工艺条件等因素,以取得最佳的综合效益。
In order to study the problem that the ideal pulsation reduction effect can be achieved by using the orifice plate alone in the super-high pressure compressor pipe, the principle of reducing the pulsation of the orifice plate with the buffer plate is expounded. The numerical simulation software FLUENT is used to establish the two- Unsteady flow model. The pulsation condition of the orifice plates at different aperture ratios was calculated and compared with those without orifice plate. Numerical simulations show that adding a suitable orifice plate alone can reduce the pulsation effectively, and the effect increases gradually with decreasing the aperture ratio. When the aperture ratio is 0.4, the pressure nonuniformity can be reduced to the original About 50%; when the aperture ratio is 0.3, the maximum pressure non-uniformity can be reduced to 38%. In addition, we should pay attention to the resistance of the orifice, and consider the follow-up process conditions and other factors in order to achieve the best overall benefits.