摘要
为了研究提高离心泵抗气蚀性能的措施,以抑制作用在泵过流区域的压力脉动、振动和动力载荷,减轻空化气蚀造成的重复使用液体火箭发动机涡轮泵损伤,满足泵的高转速、低入口压力、减小尺寸和重量等技术要求,采用计算流体力学软件,对轴流式诱导轮和带有轴流螺旋级的诱导轮进行了非定常压力脉动和气蚀性能的三维仿真计算研究。结果表明,与单一的轴流式螺旋诱导轮相比,带有轴流式螺旋级的诱导轮能够改善泵的气蚀特性,气蚀系数提高了25%,初始气蚀系数提高了30%,诱导轮出口位置的叶片通过频率压力脉动得到了抑制。
In consideration of improving cavitation capacity of centrifugal pump to inhibit pressure pulsations,vibrations and dynamic loads in flow passing areas,alleviating damages of reusable liquid rocket engine turbo-pumps caused by cavitation erosion and satisfying the requirements of high rotation speed,low inlet pressure,small sizes and light weight,three dimensional simulations of unsteady pressure pulsation and cavitation capacity are carried out to a single screw inducer and an inducer with axial-vortex stage utilizing CFD methods. The results show that compared with single screw inducer,inducer with axial-vortex stage has 25% higher cavitation coefficient,30% higher initial cavitation coefficient and lower pressure pulsation of blade passing frequency in the outlet of inducer,which all prove that cavitation capacity is obviously ameliorated.
作者
Sergey Timushev
Dmitry Klimenko
Ivan Kazennov
李家文
Sergey Timushev;Dmitry Klimenko;Ivan Kazennov;LI Jia-wen(Rocket Engines Department,Moscow Aviation Institute (National Research University),Moscow 125993,Russia;School of Astronautics,Beihang University,Beijing 100083,China)
出处
《推进技术》
EI
CAS
CSCD
北大核心
2019年第7期1458-1466,共9页
Journal of Propulsion Technology
关键词
螺旋诱导轮
轴流螺旋级
螺旋离心泵
空化性能
压力脉动
Screw inducer
Axial-vortex stage
Screw-centrifugal pump
Cavitation capacity
Pressure pulsations
