naa a22 4500 510765998 CHVBK 20180411083156.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11630-013-0613-2 doi (NATIONALLICENCE)springer-10.1007/s11630-013-0613-2 The change of the inlet geometry of a centrifugal compressor stage and its influence on the compressor performance [Elektronische Daten] [Leilei Wang, Ce Yang, Ben Zhao, Dazhong Lao, Chaochen Ma, Du Li] The impact on the compressor performance is important for designing the inlet pipe of the centrifugal compressor of a vehicle turbocharger with different inlet pipes. First, an experiment was performed to determine the compressor performance from three cases: a straight inlet pipe, a long bent inlet pipe and a short bent inlet pipe. Next, dynamic sensors were installed in key positions to collect the sign of the unsteady pressure of the centrifugal compressor. Combined with the results of numerical simulations, the total pressure distortion in the pipes, the pressure distributions on the blades and the pressure variability in the diffuser are studied in detail. The results can be summarized as follows: a bent pipe results in an inlet distortion to the compressor, which leads to performance degradation, and the effect is more apparent as the mass flow rate increases. The distortion induced by the bent inlet is not only influenced by the distance between the outlet of the bent section and the leading edge of the impeller but also by the impeller rotation. The flow fields in the centrifugal impeller and the diffuser are influenced by a coupling effect produced by the upstream inlet distortion and the downstream blocking effect from the volute tongue. If the inlet geometry is changed, the distributions and the fluctuation intensities of the static pressure on the main blade surface of the centrifugal impeller and in the diffuser are changed accordingly. Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag Berlin Heidelberg, 2013 centrifugal compressor nationallicence inlet pipe nationallicence distortion nationallicence main blade nationallicence diffuser nationallicence Wang Leilei School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut Yang Ce School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut Zhao Ben School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut Lao Dazhong School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut Ma Chaochen School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut Li Du School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut Journal of Thermal Science SP Science Press 22/3(2013-06-01), 197-208 1003-2169 22:3<197 2013 22 11630 https://doi.org/10.1007/s11630-013-0613-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11630-013-0613-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang Leilei School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut NATIONALLICENCE 700 1- Yang Ce School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut NATIONALLICENCE 700 1- Zhao Ben School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut NATIONALLICENCE 700 1- Lao Dazhong School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut NATIONALLICENCE 700 1- Ma Chaochen School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut NATIONALLICENCE 700 1- Li Du School of Mechanical Engineering, Beijing Institute of Technology, 100081, Beijing, China aut NATIONALLICENCE 773 0- Journal of Thermal Science SP Science Press 22/3(2013-06-01), 197-208 1003-2169 22:3<197 2013 22 11630 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer