naa a22 4500 510766218 CHVBK 20180411083157.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11630-013-0647-5 doi (NATIONALLICENCE)springer-10.1007/s11630-013-0647-5 Heat transfer and aerodynamics of complex shroud leakage flows in a low-pressure turbine [Elektronische Daten] [Wang Pei, Du Qiang, Yang Jie, Zhu Qiang] A numerical investigation on over-shroud & inter-shroud leakage flow has been carried out to explore the underneath flow physics at the stage of shrouded Low Pressure (LP) turbine. Compared with the No inter-Shroud gap's Leakage flow Model (NSLM) and With inter-Shroud gap's Leakage flow Model (WSLM), the aerodynamic characteristics and the heat transfer performance have been studied. Through the aerodynamic point of view, it is concluded that due to the pressure difference between the rotor's passage and the over-shroud cavity, in the stream-wise direction, flow structure has been modified, and the inter-shroud leakage flow may even cause flow separation in the vicinity of the blade passage's throat. In the circumferential direction, separation flows appear over the rotor's shroud surface (upper platform of the shroud). Meanwhile, from the point of view of heat transfer, further provision on contour maps of the non-dimensional Nusselt number reveals that the reattachment of leakage flow would enhance the heat transfer rates and endanger the rotor's labyrinth fins over the shroud. However, due to the limited amount of inter-shroud leakage flow (current computational model), temperature distribution variation along the blade surface (near the rotor's tip section) seems to have only minor insignificant differences. At the end of the paper, the author puts forward some recommendations for the purpose of future successful turbine design. Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag Berlin Heidelberg, 2013 over-shroud leakage flow nationallicence inter-shroud leakage flow nationallicence shrouded LP turbine nationallicence Pei Wang Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100190, Beijing, China aut Qiang Du Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100190, Beijing, China aut Jie Yang Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100190, Beijing, China aut Qiang Zhu Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100190, Beijing, China aut Journal of Thermal Science Springer Berlin Heidelberg 22/5(2013-10-01), 447-458 1003-2169 22:5<447 2013 22 11630 https://doi.org/10.1007/s11630-013-0647-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11630-013-0647-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pei Wang Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100190, Beijing, China aut NATIONALLICENCE 700 1- Qiang Du Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100190, Beijing, China aut NATIONALLICENCE 700 1- Jie Yang Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100190, Beijing, China aut NATIONALLICENCE 700 1- Qiang Zhu Institute of Engineering Thermophysics, Chinese Academy of Sciences, 100190, Beijing, China aut NATIONALLICENCE 773 0- Journal of Thermal Science Springer Berlin Heidelberg 22/5(2013-10-01), 447-458 1003-2169 22:5<447 2013 22 11630 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer