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Keywords: secondary flows
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Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2024, 146(9): 091007.
Paper No: TURBO-23-1332
Published Online: April 5, 2024
... and visualize the flow field within the blade passage for a rotor with EWC. The single-stage turbine enables phase-locked flow field measurements with volumetric particle image velocimetry (PIV). Purge flow was supplied to investigate a range of operating conditions in which the secondary flow structures were...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2024, 146(3): 031010.
Paper No: TURBO-23-1178
Published Online: December 14, 2023
..., around three times higher than PIV. Additionally, PIV estimated turbulence intensity (TI) in the cascade, showing TI decay along a streamline. At the highest Mach number, a peak TI occurred past a shock wave. Measurements of the outlet flow field highlighted a high TI in the secondary flow region whereas...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. October 2023, 145(10): 101005.
Paper No: TURBO-22-1251
Published Online: August 2, 2023
.... The first of this two-part paper reports detailed experimental tests that document secondary flows and coolant transport throughout the vane passage for four combustor coolant flowrates. The experimental facility imitates combustor coolant injection and engine-level turbulence and has a modified transition...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. August 2022, 144(8): 081006.
Paper No: TURBO-21-1247
Published Online: March 3, 2022
... flow features are well represented. The results show a significant impact of rotation on the secondary flow. In the tip region, the tip leakage vortex is enlarged and destabilized. Inside the tip gap, the flow is altered as well, with uniformization in the rotating case. At the blade midspan...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2022, 144(4): 041011.
Paper No: TURBO-21-1170
Published Online: November 18, 2021
... environment with phase-locked measurements used to identify and track the vortical secondary flow features through the blade passage. A baseline case without purge flow is compared to experiments with a 1.7% purge mass fraction; the latter was chosen to ensure a fully sealed wheel-space. A non-localized...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2021, 143(12): 121009.
Paper No: TURBO-20-1347
Published Online: July 14, 2021
... challenging to cool due to the complex system of secondary flows near them that wash the protective film coolants into the mainstream. This paper shows that without including combustor cooling, the complex secondary flow physics is not representative of modern engines. Aggressive injection of all cooling...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. December 2021, 143(12): 121010.
Paper No: TURBO-21-1012
Published Online: July 14, 2021
... and cooling details of a combustor-turbine interface in addition to endwall film cooling flows injected upstream of the passage. The first part of this study describes in detail, the passage aerodynamics as affected by injection of cooling flows. It reveals a system of secondary flows, including the newly...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. April 2021, 143(4): 041010.
Paper No: TURBO-20-1345
Published Online: March 24, 2021
... on Secondary Flows and Coolant Mixing in a First Stage Nozzle Guide Vane ,” Proceedings of the ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition, Volume 7B: Heat Transfer, V07BT12A060 , Virtual, Online , Sep. 21–25 . http://dx.doi.org/10.1115/GT2020-15746 [16] Zhang , L...
Journal Articles
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2020, 142(9): 091002.
Paper No: TURBO-20-1014
Published Online: July 30, 2020
... friction losses. To identify the main causes of loss, a method was evolved. It was validated and supplied by pneumatic measurement data. On this basis, analytical approaches were taken to quantify the total pressure losses due to friction, secondary flows, incidence, and trailing edge flow. As a result...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. August 2020, 142(8): 081006.
Paper No: TURBO-19-1132
Published Online: July 29, 2020
...Bijie Yang; Peter Newton; Ricardo Martinez-Botas Radial or mixed flow turbines are very common in industrial application, spanning turbochargers, small turbines for power generation, and energy recovery systems. Secondary flows have received a limited attention in the literature, and this papers...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. March 2020, 142(3): 031004.
Paper No: TURBO-19-1275
Published Online: February 20, 2020
...Marek Pátý; Sergio Lavagnoli The efficiency of modern axial turbomachinery is strongly driven by the secondary flows within the vane or blade passages. The secondary flows are characterized by a complex pattern of vortical structures that origin, interact, and dissipate along the turbine gas path...
Journal Articles
Publisher: ASME
Article Type: Research-Article
J. Turbomach. January 2013, 135(1): 011002.
Paper No: TURBO-07-1131
Published Online: October 18, 2012
... the thickness of the endwall inlet boundary layer to the turbine stage and reducing the strength of secondary flows within the passage. The reduction in secondary flows leads to less mixing in the endwall region. This allows for an improved cooling of the endwall and airfoil surfaces with injected and leakage...
Journal Articles
Publisher: ASME
Article Type: Research Papers
J. Turbomach. September 2012, 134(5): 051003.
Published Online: May 7, 2012
... of coolant from a row of angled holes from the edge of the stator hub. The aim of this study is to improve the distribution of the injected coolant on the rotor hub wall. To achieve this, it is necessary to understand how the coolant and leakage flows interact with the rotor secondary flows. The first part...