naa a22 4500 510765793 CHVBK 20180411083156.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1007/s11630-013-0660-8 doi (NATIONALLICENCE)springer-10.1007/s11630-013-0660-8 Performance improvements of a subsonic axial-flow compressor by means of a non-axisymmetric stator hub end-wall [Elektronische Daten] [Xuefeng Zhang, Xingen Lu, Junqiang Zhu] This paper deals with the application of a non-axisymmetric hub end-wall on the stator of a single stage high subsonic axial-flow compressor. In order to obtain a state-of-the-art stator non-axisymmetric hub end-wall configuration fulfilling the requirements for higher efficiency and total pressure ratio, an automated multi-objective optimizer was used, in conjunction with 3D-RANS-flow simulations. For the purpose of quantifying the effect of the optimal stator non axis-symmetric hub contouring on the compressor performance and its effects on the subsonic axial-flow compressor stator end-wall flow field structure, the coupled flow of the compressor stage with the baseline, axisymmetric and the non-axisymmetric stator hub end-wall was simulated with a state-of-theart multi-block flow 3D CFD solver. Based on the CFD simulations, the optimal compressor hub end-wall configuration is expected to increase the peak efficiency by approximately 2.04 points and a slight increase of the total pressure ratio. Detailed analyses of the numerical flow visualization at the hub have uncovered the different hub flow topologies between the cases with axisymmetric and non-axisymmetric hub end-walls. It was found that that the primary performance enhancement afforded by the non-axisymmetric hub end-wall is a result of the end-wall flow structure modification. Compared to the smooth wall case, the non-axisymmetric hub end-wall can reduce the formation and development of in-passage secondary flow by aerodynamic loading redistribution. Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag Berlin Heidelberg, 2013 Axial-flow compressor nationallicence Non-axisymmetric end-wall nationallicence Numerical simulation nationallicence Zhang Xuefeng Key Laboratory of Light-duty Gas-turbine, IET, CAS, 100190, Beijing, China aut Lu Xingen Key Laboratory of Light-duty Gas-turbine, IET, CAS, 100190, Beijing, China aut Zhu Junqiang Key Laboratory of Light-duty Gas-turbine, IET, CAS, 100190, Beijing, China aut Journal of Thermal Science Springer Berlin Heidelberg 22/6(2013-12-01), 539-546 1003-2169 22:6<539 2013 22 11630 https://doi.org/10.1007/s11630-013-0660-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11630-013-0660-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Xuefeng Key Laboratory of Light-duty Gas-turbine, IET, CAS, 100190, Beijing, China aut NATIONALLICENCE 700 1- Lu Xingen Key Laboratory of Light-duty Gas-turbine, IET, CAS, 100190, Beijing, China aut NATIONALLICENCE 700 1- Zhu Junqiang Key Laboratory of Light-duty Gas-turbine, IET, CAS, 100190, Beijing, China aut NATIONALLICENCE 773 0- Journal of Thermal Science Springer Berlin Heidelberg 22/6(2013-12-01), 539-546 1003-2169 22:6<539 2013 22 11630 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer