Experimental investigation of the flow instability of a compression system with an upstream plenum
Experimental investigation of the flow instability of a compression system with an upstream plenum
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具有上游静压室的压缩系统流动不稳定性的实验研究
DOI：
10.1016/j.expthermflusci.2018.12.020
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发表时间：
2019-04
影响因子：
3.2
通讯作者：
Sun Zhenzhong
中科院分区：
文献类型：
--
作者：
Zhang Meijie;Zheng Xinqian;Sun Zhenzhong
在发动机小型化的趋势下，有限的安装空间导致进气管配置变得更加复杂，并且两级压缩系统中的空气滤清器和中冷器等部件更靠近压气机入口。进气管结构对压缩系统的流动稳定性至关重要，不可忽视。本文通过实验研究了两种压缩系统在有、无进气道时的流动不稳定性演化规律，即进气道中空气滤清器或中冷器的体积效应。结果表明，无增压室压缩系统在中高速段存在双区喘振现象，而有增压室压缩系统在中高速段不存在双区喘振现象，系统的不稳定性发展较为简单。与无增压室的系统相比，虽然深喘振边界向右移动，但轻度喘振边界向左移动，这表明有增压室的管道结构有利于扩大压气机的稳定工作范围。从能量输入和耗散的角度来看，有空腔的系统耗散能量的能力较弱，一旦发生轻度喘振，压缩系统很快就会陷入深度喘振。相比之下，没有增压室的系统可以承受更长的时间从轻微的波动，然后落入深浪涌。这些研究结果揭示了压缩系统流动不稳定的机理，为压缩系统的安装和一体化设计提供了一定的指导。
Under the trend of engine downsizing, limited installation space leads to the intake pipe configuration becoming more complex, and the components, such as the air filter and the intercooler in two-stage compression systems, are much closer to the compressor inlet. The intake pipe configuration becomes essential and nonnegligible for the flow stability of the compression system. Experimental investigations on the flow instability evolution of two compression systems with and without an upstream plenum, which represents the volume influence of the air filter or the intercooler, were carried out in this paper. The results show that there exists a two-regime-surge phenomenon in the compression system without the plenum at the medium- and high-speed lines while this phenomenon disappears in the system with the plenum in which the instability evolution is straightforward. Although the deep surge boundary shifts to the right compared to the system without the plenum, the mild surge boundary shifts to the left, which demonstrates that the pipe configuration with the plenum is beneficial for extending the compressor stable work range. From the perspective of energy input and dissipation, the dissipation ability of the system with the plenum is weaker, so once mild surge occurs, the compression system will fall into deep surge very soon. In contrast, the system without the plenum can stand the oscillations from mild surge much longer before falling into deep surge. These findings shed more light on the flow instability mechanism of compression systems and provide some guidance for the installation and integrated design of compression systems.
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DOI：
10.1115/1.4034239
发表时间：
2016-06
影响因子：
1.5
作者：
Enrico Munari;Mirko Morini;M. Pinelli;P. R. Spina;A. Suman
通讯作者：
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DOI：
10.4271/2011-01-0370
发表时间：
2011-04
期刊：
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DOI：
10.3233/ica-1993-1102
发表时间：
1993
期刊：
Computer-Aided Engineering
影响因子：
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