caa a22 4500 606198768 CHVBK 20210128100935.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00348-015-1964-0 doi (NATIONALLICENCE)springer-10.1007/s00348-015-1964-0 Flow visualization for investigating stator losses in a multistage axial compressor [Elektronische Daten] [Natalie Smith, Nicole Key] The methodology and implementation of apowder-paint-based flow visualization technique along with the illuminated flow physics are presented in detail for application in a three-stage axial compressor. While flow visualization often accompanies detailed studies, the turbomachinery literature lacks a comprehensive study which both utilizes flow visualization to interrupt the flow field and explains the intricacies of execution. Lessons learned for obtaining high-quality images of surface flow patterns are discussed in this study. Fluorescent paint is used to provide clear, high-contrast pictures of the recirculation regions on shrouded vane rows. An edge-finding image processing procedure is implemented to provide a quantitative measure of vane-to-vane variability in flow separation, which is approximately 7% of the suction surface length for Stator 1. Results include images of vane suction side corner separations from all three stages at three loading conditions. Additionally, streakline patterns obtained experimentally are compared with those calculated from computational models. Flow physics associated with vane clocking and increased rotor tip clearance and their implications to stator loss are also investigated with this flow visualization technique. With increased rotor tip clearance, the vane surface flow patterns show a shift to larger separations and more radial flow at the tip. Finally, the effects of instrumentation on the flow field are highlighted. Springer-Verlag Berlin Heidelberg, 2015 Smith Natalie School of Aeronautics and Astronautics, Purdue University, 500 Allison Rd., 47907, West Lafayette, IN, USA aut Key Nicole School of Mechanical Engineering, Purdue University, 500 Allison Rd., 47907, West Lafayette, IN, USA aut Experiments in Fluids Springer Berlin Heidelberg 56/5(2015-05-01), 1-17 0723-4864 56:5<1 2015 56 348 https://doi.org/10.1007/s00348-015-1964-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00348-015-1964-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Smith Natalie School of Aeronautics and Astronautics, Purdue University, 500 Allison Rd., 47907, West Lafayette, IN, USA aut NATIONALLICENCE 700 1- Key Nicole School of Mechanical Engineering, Purdue University, 500 Allison Rd., 47907, West Lafayette, IN, USA aut NATIONALLICENCE 773 0- Experiments in Fluids Springer Berlin Heidelberg 56/5(2015-05-01), 1-17 0723-4864 56:5<1 2015 56 348