小孔径多级孔板组件节流效应仿真  

Simulation for throttling effect of small aperture multistage orifice units

作　　者：刘万龙[1] 梁国柱[1] 徐铭 张化照 

机构地区：[1]北京航空航天大学宇航学院,北京100191 [2]北京宇航系统工程研究所,北京100076

出　　处：《北京航空航天大学学报》2011年第2期241-244,共4页Journal of Beijing University of Aeronautics and Astronautics

摘　　要：对小孔径多级孔板组件(简称多级孔板)节流效应进行仿真研究,发现这类仿真对初场要求非常严格,初场不合理很容易产生伪平衡问题,通过迭代计算寻找合理初场的方法解决了该问题.同时对孔径0.1mm、孔径比0.025的多级孔板进行了数值仿真,仿真结果表明孔板数是影响多级孔板流量系数的主要因素.根据仿真数据给出多级孔板流量系数拟合公式,可以应用于工程设计计算.Throttling effect of small aperture multistage orifice units was studied through simulation method.It was found that strict initial flow field was needed in this kind of simulation,and the simulation would be dummy-balanced with irrational initial flow field.This problem was solved by iterative finding proper initial flow field.The multistage orifice units with 0.1 mm aperture and 0.025 aperture ratio were simulated.The simulation result shows that the number of the orifices is the major factor which influences the flow coefficients of the multistage orifice units.Fitted formulae for the flow coefficients were given depending on the simulation results.The fitted formulae can be applied to actual engineering design calculation.

关 键 词：孔板 流动仿真 节流 流量系数 

分 类 号：TB937[一般工业技术—计量学]