... that the experimental method with the distortion generation way could be applied widely in the study of the unstable operation characteristics of axial compressors. compressor experiment unsteady inlet distortion performance stall Proceedings of ASME Turbo Expo 2024 Turbomachinery Technical Conference...

... ranging from hundreds to millions, wall-resolved LES numerical simulation can be achieved at an affordable computational cost (∼1 GPU hour), showing good industrial application prospects. high-order accuracy unsteady STE-KEP-FR GPU LES turbomachinery Proceedings of ASME Turbo Expo 2024...

... Abstract The shock-boundary layer interaction in transonic flows is known to cause strong unsteady flow effects that negatively affect the performance and operability of blade and cascade designs. Despite decades of research on the subject, little is still known about the physical mechanisms...

... demonstrates to perform best in terms of accuracy and computational effort. Finally, the impact of unsteadiness and turbulence modeling on the accuracy of the prediction is presented. In contrast to previous studies, the local distribution of fluctuations and its impact on the thermal boundary layers...

... Abstract The performance of compressor blades in transonic flow conditions is heavily hampered by unsteady flow effects caused by the Shock-Boundary Layer Interaction (SBLI). Even though these effects have been subject to research for a long period of time, very little is still known about...

... Abstract In the present work linear and non-linear regression functions have been tuned with an extensive database describing the unsteady aerodynamic efficiency of low-pressure-turbine cascades. The learning strategy has been first defined using a dataset published in a previous work...

.... Such aerodynamic instabilities are investigated using CFD simulations by performing 3D, Unsteady Reynolds Averaged Navier Stokes (URANS) of the low pressure, last turbine stage coupled with an axial exhaust hood, with structural struts. The full annulus mesh of both the last stage and diffuser is considered...

... Abstract The performance of turbomachines is often dependent on the unsteady flow fields they naturally produce, owing primarily to row-to-row interactions from both moving and stationary components, as well as the unsteady nature of the turbulent flow. When it comes to computational fluid...

... Abstract Periodic unsteady flow kinematics in a shrouded multistage low-speed axial compressor has been measured for the first time. Data have been acquired at the inlet and exit of a shrouded 3 rd -stage stator with a particular focus on the hub flows. The newly found features of the hub flow...

...-dimensional unsteady through-flow model based on body force theory is developed to reflect the dynamic stall process of multistage axial compressors with acceptable computational costs. The influence of blade geometric parameters is fully considered in blade force source terms. The source terms are related...

...QUANTITATIVE EVALUATION AND OPTIMIZATION OF FEEDING-BACK PREVIOUS CYCLES INFORMATION FOR CFD PERIODIC CONVERGENCE Jesus Contreras1, Javier Crespo1 1ITP Aero, Madrid, Spain ABSTRACT Unsteady simulations represent an expensive sub-set of CFD simulations in terms of computational resources. Among...

... pressure probes. combustors cooling measurement techniques unsteady COOLED PRESSURE PROBES DESIGN METHODOLOGY FOR HARSH ENVIRONMENT APPLICATIONS Julien Clinckemaillie, Fabrizio Fontaneto [email protected], [email protected] Turbomachinery and Propulsion Department von Kármán Institute...

... method, film cooling effectiveness distributions on trailing-edge cutback at three blowing ratios were computed and compared against the experimental data. The coherent unsteadiness in cutback region was visualized to reveal the mixing process between mainstream and coolant flow. The numerical accuracies...

... Abstract The unsteady characteristic of the pressure-swirl atomization system was studied experimentally in this paper. It was found that the fluctuations of the spray can be divided into two modes: high and low frequency mode, among which the frequency of the high mode is within the range...

... numerically using a steady RANS method, an unsteady RANS method and LES. The numerical results based on the three methods are analyzed in detail and compared with the available experimental data. For the LES method with a subgrid-scale model, the instantaneous flow structure and the heat transfer can...

... 05 02 2009 Wells turbine unsteady 3D dynamic stall A Wells turbine designed for power generation in an innovative OWC (Oscillating Water Column) device for sea-wave energy conversion is investigated. This work aims to predict the turbine performance under a continuously...

...the 3D unsteady flow field. The detailed illustration of the outlet fl outlet is KEYW unstead NOME cp H h MP10 MP22 p 0 reference to gy ve ne ve in he dy Proceedings of ASME TURBO EXPO 2004 June 14-17, 2004, Vienna, Austria E Proceedings of ASME Turbo Expo 2004 Power for Land, Sea, and Air June 14...

... unsteady three dimensional blade design multistage turbine An important goal in the development of turbine bladings is improving their efficiency to achieve an optimized usage of energy resources. This requires a detailed insight into the complex 3D-flow phenomena in multi-stage...

.... The general flow field, the jet trajectory and the streamwise circulation are utilized in the validation of the quasi steady assumption. film cooling unsteady modelling density ratio blowing ratio PIV Proceedings of ASME TURBO EXPO am no Tw di sim cir as ra IN ot be ec bu pr str res Zü...