阀门关闭对低温盲支管水击的影响分析  

Effect of valve closing on water hammer in cryogenic blind branch tube

作　　者：刘佳兴 王向南 刘海飞[1] 唐强[1] Liu Jiaxing;Wang Xiangnan;Liu Haifei;Tang Qiang(Beijing Institute of Space Launch Technology,Beijing 100076,China;Unit 63790 of PLA,Wenchang 571300,China)

机构地区：[1]北京航天发射技术研究所,北京100076 [2]中国人民解放军63790部队,文昌571300

出　　处：《低温与超导》2020年第7期1-4,共4页Cryogenics and Superconductivity

基　　金：国家自然科学基金(11602014)资助。

摘　　要：采用SINDA/FLUINT软件建立了具有盲支管的低温加注管路模型,仿真计算得到了不同阀门关闭时间、盲支管长度、阀门关闭顺序、管径下的水击压力变化情况。结果显示,阀门关闭时间越短,造成盲支管内的压力变化越剧烈,形成较大的压力峰值,容易对管路造成损坏;在低温管路处于冷态的情况下,盲支管长度对盲支管内压力峰值影响不大;某一支路阀门关闭使得该阀前压力出现变化,对另一支路压力影响不大,在整个管路形成封闭腔后,阀门关闭造成系统压力急剧变化,影响较大;管径越大,阀门关闭时的水击压力峰值越大。SINDA/FLUINT was applied to develop a cryogenic filling pipe model with a blind branch tube.The effects of valve closing time,blind branch tube length,valve closing order and pipe diameter on water hammer pressure were obtained by simulation.The results indicate that a shorter valve closing time makes the water hammer pressure change more dramatically to form big pressure peak.As a result,the pipe is more easy to be damaged.The length of blind branch tube slightly affects the pressure peak when the pipe is fully pre-cooled.Valve closing in one pipe branch can cause pressure change in this branch,which slightly affects the pressure of the other pipe branch.When the pipe system forms enclosed cavity,the valve closing can cause a dramatic pressure change.The water hammer pressure peak increases with pipe diameter.

关 键 词：低温管路 盲支管 水击 仿真 

分 类 号：V554.4[航空宇航科学与技术—人机与环境工程]