Estos cálculos son útiles ya que experimentalmente es difícil realizar mediciones dentro del canal. Se determinan numéricamente el campo de velocidad y distribución de variables termodinámicas en el interior del túnel. Resultados: Se presentan mediciones experimentales del flujo en la entrada del túnel de viento. Se usan interpolaciones polinómicas para modificar el diseño de la sección de contracción y se realizan simulaciones numéricas para comparar resultados numéricos de flujo para el túnel de viento existente y el modificado. A bajas velocidades se implementa el Método de Elementos Finitos para determinar la función de corriente bajo un método de Galerkin. Estos valores empíricos se usan como parámetros para definir condiciones de frontera en simulaciones. Método: Se efectúan mediciones experimentales del campo de velocidad y distribución presión de entrada de un túnel de viento. En este trabajo se presenta un estudio numérico para caracterizar un túnel de viento existente proponiendo modificaciones que buscan mejorar la calidad del flujo en la cámara de ensayos. Keywords: wind tunnels, Finite Element Method, irrotational flow Language: English.Ĭontexto: Los túneles de viento son dispositivos esenciales en el estudio de las propiedades del flujo a través de objetos y prototipos a escala. It is observed that modifications in the geometry of the tunnel can improve the flow in the test section of the wind tunnel in the laminar regime. Additionally, numerical calculations of these variables are presented under modifications in the tunnel geometry.Ĭonclusions: A comparison between these simulations show that laminar flow at low velocities can be modeled as incompressible and irrotational fluid under a bidimensional approximation along its longitudinal section. This computations are useful since it is experimentally difficult to make measurements inside the channel. The velocity field and distribution of thermodynamic variables inside the tunnel are numerically determined. Results: Experimental measurements of the flow at the wind tunnel entrance are presented. Polynomial interpolations are employed to modify the contraction section design, and numerical simulations are performed in order to compare the numerical results of the flow for the existing and the modified wind tunnels. The Finite Element Method (FEM) at low speeds is implemented to determine the stream function by using a standard Galerkin method. These empirical values are used as parameters to define boundary conditions in simulations. Method: Experimental measurements of the inlet velocity and pressure distribution of a wind tunnel are performed. This work presents a numerical study to characterize an existing wind tunnel, proposing modifications with the aim to improve the quality of the flow in the test chamber. In addition, the model was experimentally validated by measuring currents induced by moving pods.Context: Wind tunnels are essential devices in the study of flow properties through objects and scaled prototypes. The obtained results were compared with the FEM results to validate the developed model. Next, levitation coils of SC-EDS were designed and analyzed for use in Hyperloop. The developed model was then applied to design an EDS system using the decoupled resistance-inductance equations of levitation coils. In this study, a novel model that can rapidly and accurately calculate the frequency-dependent equivalent inductance was developed. However, analyzing an EDS system requires the electromagnetic transient analysis of complex three-dimensional (3D) features, and its computational load generally limits the use of numerical methods, such as the 3D finite element method (FEM) or dynamic circuit theory. Among those technologies, superconducting (SC) electrodynamic suspension (EDS) is a highly effective levitation system for Hyperloop owing to its advantages of a large levitation gap, levitation stability, and control being unnecessary. Thus far, various levitation technologies in existing high-speed maglev trains have been considered. During acceleration to and driving at a subsonic speed, magnetic levitation is employed. In Hyperloop, travelling occurs in near-vacuum tubes under 0.001 atm at a subsonic speed of up to 1200 km/h. Hyperloop is a new concept of ground transportation.
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