المؤلفون: Villalpando, Fernando, Reggio, Marcelo, Ilinca, Adrian

مصطلحات موضوعية: 2107 Modélisation, simulation et méthodes des éléments finis, 2108 Génie aérospatial, aéronautique et automobile

الوصف: This investigation focuses on the application of the computational fluid dynamics tool FLUENT to the study of flows over the NACA 63–415 airfoil at various angles of attack. With the aim of selecting the most suitable turbulence model to simulate flow around ice-accreted airfoils, this work concentrates on assessing the prediction capabilities of various turbulence models on clean airfoils at the large angles of attack that cause highly separated flows to occur. The study was undertaken by conducting simulations with the one-equation Spalart-Allmaras (SA) model, the two-equation RNG k- and SST k-ω models, and the Reynolds stress model (RSM). Domain discretization was carried out using general quadrilateral grids generated with GAMBIT, the FLUENT preprocessing tool. Comparisons were made with available experimental data.

وصف الملف: text

العلاقة: https://publications.polymtl.ca/3651/1/2011_Villalpando_Assessment_Turbulence_Models_Flow_Simulation_ensemble.pdfTest; Villalpando, F., Reggio, M., & Ilinca, A. (2011). Assessment of turbulence models for flow simulation around a wind turbine airfoil. Modelling and Simulation in Engineering, 2011, 1-8.

الإتاحة: https://doi.org/10.1155/2011/714146Test
https://publications.polymtl.ca/3651Test/
https://publications.polymtl.ca/3651/1/2011_Villalpando_Assessment_Turbulence_Models_Flow_Simulation_ensemble.pdfTest

المؤلفون: Castro, Laura, Urquiza, Gustavo, Adamkowski, Adam, Reggio, Marcelo

مصطلحات موضوعية: 2100 Génie mécanique, 2107 Modélisation, simulation et méthodes des éléments finis

الوصف: On-site power and mass flow rate measurements were conducted in a hydroelectric power plant (Mexico). Mass flow rate was obtained using Gibson's water hammer-based method. A numerical counterpart was carried out by using the commercial CFD software, and flow simulations were performed to principal components of a hydraulic turbine: runner and draft tube. Inlet boundary conditions for the runner were obtained from a previous simulation conducted in the spiral case. The computed results at the runner's outlet were used to conduct the subsequent draft tube simulation. The numerical results from the runner's flow simulation provided data to compute the torque and the turbine's power. Power-versus-efficiency curves were built, and very good agreement was found between experimental and numerical data.

وصف الملف: text

العلاقة: https://publications.polymtl.ca/3646/1/2011_Castro_Experimental_Numerical_Simulations_Predictions_Comparison_ensemble.pdfTest; Castro, L., Urquiza, G., Adamkowski, A., & Reggio, M. (2011). Experimental and numerical simulations predictions comparison of power and efficiency in hydraulic turbine. Modelling and Simulation in Engineering, 2011, 1-8.

الإتاحة: https://doi.org/10.1155/2011/146054Test
https://publications.polymtl.ca/3646Test/
https://publications.polymtl.ca/3646/1/2011_Castro_Experimental_Numerical_Simulations_Predictions_Comparison_ensemble.pdfTest

المؤلفون: Boukas, El-Kébir, Al-Muthairi, N. F.

مصطلحات موضوعية: 2100 Génie mécanique, 2107 Modélisation, simulation et méthodes des éléments finis

الوصف: This paper considers the stabilization problem of the class of continuous-time linear stochastic hybrid systems with Wiener process. The ℋ∞ state feedback stabilization problem is treated. A state feedback controller with constant gain that does not require access to the system mode is designed. LMI-based conditions are developed to design the state feedback controller with constant gain that stochastically stabilizes the studied class of systems and, at the same time, achieve the disturbance rejection of a desired level. The minimum disturbance rejection is also determined. Numerical examples are given to show the usefulness of the proposed results.

وصف الملف: text

العلاقة: https://publications.polymtl.ca/3665/1/2004_Boukas_H-infinite_constant_gain_state_feedback_ensemble.pdfTest; Boukas, E.-K., & Al-Muthairi, N. F. (2004). ℋ∞constant gain state feedback stabilization of stochastic hybrid systems with Wiener process. Mathematical Problems in Engineering, 2004(4), 333-345.

الإتاحة: https://doi.org/10.1155/s1024123x04402038Test
https://publications.polymtl.ca/3665Test/
https://publications.polymtl.ca/3665/1/2004_Boukas_H-infinite_constant_gain_state_feedback_ensemble.pdfTest