摘要
为获得离心压气机各元件静压分布,苇点开展了跨音速离心压气机级间静压测试研究,研究结果表明:(1)蜗舌未造成导风轮进口静压分布周向不均匀;(2)蜗舌导致了短叶片轮缘静压分布的周向不均匀性;(3)同一转速,跨音速高效工况周向静压分布并不均匀;(4)跨音速时,蜗壳沿流动方向总是减速扩压;(5)相同转速,扩压器静压提升变化很小(约3kPa),而叶轮静压提升变化很大(约13～50 kPa),叶轮静压提升的改变决定着特性线的陡峭程度。
To obtain the static pressure distributions of each element of centrifugal compressor in engine turbocharger, along the circumferential and streamline directions, establish the investigation foundation of flow control and pressure field measurement, the author conducted inter-stage static pressure test of transonic centrifugal compressor. The results present： （1） volute tongue doesn＇t set up a circumferential disturbance of induce inlet static pressure （disturbance value is lower than 2.5 kPa）; （2） volute tongue sets up a circumferential disturbance of splitter inlet static pressure near the cover of impeller; （3） in transonic condition, high efficiency at the same rotation speed exits in a circumferential disturbance; （4） in transonic condition, volute will always have the pressure increase and velocity decrease along the flow direction; （5） at the rotational speed, changes of pressure rise in diffuser seem small （below 3 kPa）, but that in impeller seem larger （about 13-50 kPa）, which manipulate the steep level of compressor pressure ratio distributions along mass flow.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第10期1680-1684,共5页
Journal of Engineering Thermophysics
基金
国家级重点实验室基金资助项目(No.9140C3301030701)
关键词
压力测试
跨音速
压气机
增压器
pressure measurement
transonic
compressor
turbocharger
