Improving energy extraction from pulsating exhaust flow by active operation of a turbocharger turbine
Improving energy extraction from pulsating exhaust flow by active operation of a turbocharger turbine
复制标题
通过涡轮增压器涡轮的主动运行改善脉动排气流的能量提取
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
R. Martinez
中科院分区：
文献类型：
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作者：
S. Rajoo;R. Martinez
设计并试验了一种具有可旋转喷嘴叶片的混流式涡轮机，以主动适应脉动排气流。涡轮机在48000 rpm的等效速度下进行测试，其中入口流量脉动为40 Hz和60 Hz，这分别对应于1600 rpm和2400 rpm的四冲程柴油发动机速度。每个脉冲周期的喷嘴叶片操作计划在两种一般模式下进行实验评估;由于脉动流和叶片的强制正弦振荡以匹配输入脉动流而导致的叶片的自然打开和关闭。比较两种模式的涡轮机能量提取以及效率，以制定其有效性。
A mixed flow turbine with pivoting nozzle vanes was designed and tested to actively adapt to the pulsating exhaust flow. The turbine was tested at equivalent speed of 48000 rpm with inlet flow pulsation of 40Hz and 60Hz, which corresponds to a 4-stroke diesel engine speed of 1600 rpm and 2400 rpm respectively. The nozzle vane operating schedules for each pulse period are evaluated experimentally in two general modes; natural opening and closing of the vanes due to the pulsating flow and the forced sinusoidal oscillation of the vanes to match the incoming pulsating flow. The turbine energy extraction as well as efficiency is compared for the two modes to formulate its effectiveness.