计量学报2016，Vol.37Issue(z1)：175-179,5.DOI:10.3969/j.issn.1000-1158.2016.z1.40
音速喷嘴下游管路内流场数值模拟及对流出系数的影响
Numerica1 Simulation for the Downstream Pipeline and Its Influence on the Discharge Coefficient
摘要
Abstract
Through theoretical analysis and by establishing mathematical models,the numerical simulations for the sonic nozzles and their downstream pipelines with throat diameters of 10 mm and 0.96 mm were carried out by means of the CFD software respectively.The comparison of simulation results and empirical values and actual values are relatively consistent.According to the simulation results,pressure changes strongly from the nozzle outlet,the critical back pressure ratio changes with the straight pipeline length increasing;when the back pressure ratio is less than a certain value,the pressure in the downstream pipeline appears fluctuations in the nozzle outlet.关键词
计量学/音速喷嘴/流出系数/下游管路/数值模拟Key words
metrology/sonic nozzle/discharge coefficient/downstream pipeline/numerical simulation分类
通用工业技术引用本文复制引用
韩珂,罗冬,沈昱明..音速喷嘴下游管路内流场数值模拟及对流出系数的影响[J].计量学报,2016,37(z1):175-179,5.
