摘要
为获得车用涡轮增压器离心压气机各元件进出口及周向静压分布,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:蜗舌结构未造成导风轮进口静压分布周向不均匀(导风轮进口周向压力波动在2.5 kPa之内);蜗舌结构导致短叶片轮缘静压分布的周向不均匀性;同一转速下,跨音速流动最高效率工况周向静压分布不均匀;叶轮跨音速时,蜗壳沿着流动方向进行减速扩压;同一转速下,扩压器静压提升变化很小(约在3 kPa之内),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压比流量特性线的陡峭程度。
To obtain the static pressure distribution along the circumferential element of compressor in engine turbocharger, the inter-stage static pressure tests of transonic centrifugal compressor were conducted. The results show that volute tongue doesn＇t set up a circumferential disturbance of inducer inlet static pressure （disturbance value is lower than 2.5 kPa） ; Volute tongue sets up a circumferential disturbance of splitter inlet static pressure near the cover of impeller; In transonic condition, high efficiency at the same speed exists in a circumferential disturbance; In transonic condition, the pressure always increases and the velocity decreases along the flow direction at the volute; At some speeds, changes of pressure rise in diffuser seem small （below 3 kPa）, but that in impeller seem larger （about 13-50 kPa）, the latter manipulates the gradient of the curve of pressure ratio vs mass flow.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2010年第2期53-58,共6页
Chinese Internal Combustion Engine Engineering
关键词
内燃机
压力测量
跨音速
压气机
增压器
IC engine
pressure measurement
transonic
compressor
turbocharger
