车载真空厕所空气射流器性能的数值模拟  

Numerical simulation of performance of air-jet vacuum pump for coach toilet

作　　者：高飞[1] 周敬宣[1] 李旻[1] 

机构地区：[1]华中科技大学环境科学与工程学院,湖北武汉430074

出　　处：《真空》2010年第5期63-67,共5页Vacuum

摘　　要：空气射流真空器是长途客车车载真空厕所的动力源,具有一定压力的压缩空气通过该射流器将产生抽吸便器内污水所需的负压。利用FLUENT软件对其内部流场进行非稳态数值模拟,分析了在一定工况条件下,面积比、喷嘴距、等截面混合室长、扩散段锥角以及喷嘴喉部长、喷嘴收缩段长、喷嘴扩散段长对接收室内残余压力的影响,为此类真空射流器的设计提供了一定的理论支持。Air-jet vacuum pump as the pneumatic source of a coach toilet provides the negative pressure to pump the sewage out of toilet bowl via the compressed air passing through the pump under cretain pressure.The software FLUENT was used for the unsteady numerical simulation of the flow field inside the vacuum toilet system to analyze the effects of ratio of areas,distance between De Laval nozzles,length of uniform-section mixing chamber,taper angle of diffusion segment and both lengths of the contraction and diffusion segments of nozzle throat on the remaining pressure in suction chamber.A reference is thus provided theoretically to the design of such air-jet vacuum pumps.

关 键 词：空气射流真空器 FLUENT CFD 结构参数 残余压力 

分 类 号：TB75[一般工业技术—真空技术]