Flow Instability Assessment Occurring in Low Flow Rate Region According to the Change of a Centrifugal Compressor Impeller Shape

2016 ◽  
Vol 19 (2) ◽  
pp. 21-26
Author(s):  
Seong Hwi Jo ◽  
Hong Jip Kim ◽  
Myong Hee Lee
Keyword(s):  
Flow Rate ◽  
Centrifugal Compressor ◽  
Flow Instability ◽  
Low Flow ◽  
Rate Region ◽  
Compressor Impeller ◽  
Low Flow Rate

Experimental Investigation of Surge Phenomena in a Transonic Centrifugal Compressor With Inlet Distortion

2020 ◽  
Author(s):  
Sasuga Ito ◽  
Masato Furukawa ◽  
Satoshi Gunjishima ◽  
Takafumi Ota ◽  
Kazuhito Konishi ◽  
...  
Keyword(s):  
Flow Rate ◽  
Centrifugal Compressor ◽  
Flow Instability ◽  
Pressure Sensors ◽  
Low Flow ◽  
Inlet Distortion ◽  
Transonic Centrifugal Compressor ◽  
Response Pressure ◽  
Surge Phenomena ◽  
Low Flow Rate

Abstract Inlet distortion has influence on the aerodynamic performance of turbomachinery such as compressors, turbines and fans. On turbochargers, bent pipes are installed around the compressor due to the spatial limitations in the engine room of the vehicle. As the result, the compressor is operated with the distorted inflow. In the low flow rate operation, the distorted inflow also affects the flow instability like stall and surge. Especially, the operation range on the low flow rate side is defined based on the flow rate where surge occurs, so it is important to investigate the effect of the distorted inflow on surge. In this study, the effect of the inlet distortion to surge phenomena has been investigated by the experiments with a transonic centrifugal compressor. A bent pipe has been installed at the upstream of the compressor to generate a distorted flow. Experiments have been also conducted under the condition that a straight pipe was installed upstream of the compressor, and unsteady measurements with high response pressure sensors and an I-type hot wire probe have been carried out to each experiments. In addition, Fast Fourier transform (FFT) and Wavelet transform have been applied to the unsteady measurement results obtained from each experiment.

scholarly journals Two-Phase Flow Instability at Low Flow Rate Conditions

1984 ◽  
Vol 21 (7) ◽  
pp. 491-500 ◽  
Author(s):  
Kenji FUKUDA ◽  
Akihiko KATO ◽  
Shu HASEGAWA
Keyword(s):  
Flow Rate ◽  
Two Phase Flow ◽  
Flow Instability ◽  
Low Flow ◽  
Phase Flow ◽  
Two Phase ◽  
Low Flow Rate

Unsteady flow at low flow-rate region in a semi-open propeller fan (velocity fluctuation outside of blade tip)

2011 ◽  
Vol 20 (3) ◽  
pp. 218-223 ◽  
Author(s):  
Norimasa Shiomi ◽  
Yoichi Kinoue ◽  
Ying-zi Jin ◽  
Pin Liu ◽  
Toshiaki Setoguchi
Keyword(s):  
Unsteady Flow ◽  
Flow Rate ◽  
Velocity Fluctuation ◽  
Low Flow ◽  
Rate Region ◽  
Blade Tip ◽  
Low Flow Rate

scholarly journals Periodicity of Pressure Fluctuations at Low Flow Rate in Delivery Duct of Centrifugal Compressor.

1995 ◽  
Vol 61 (591) ◽  
pp. 3848-3853
Author(s):  
Yasuyuki Komatsubara ◽  
Atsutaka Muto ◽  
Hoshio Tsujita ◽  
Shimpei Mizuki
Keyword(s):  
Flow Rate ◽  
Centrifugal Compressor ◽  
Pressure Fluctuations ◽  
Low Flow ◽  
Low Flow Rate
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