Luciana Bassi Marinho Pires

La Influencia de la Altura de la Capa Límite Oceánica en la Región del Centro de Lanzamientos de Alcántara en Brasil

The influence of the height of the ocean boundary layer in the region where the Alcântara Space Center is located, was studied. The topography of the region is very complex and it includes a 50 m coastal cliff. A 2D numerical code was used, where the equations were written using the vorticityvelocity formulation. High order compact finite differences schemes were used for the spatial derivatives and the time integration was performed with a fourth-order Runge-Kutta scheme. The coastal cliff was specified through the immersed boundary method. The numerical results showed that the height of the ocean boundary layer influences the formation of the height of the internal boundary layer of the cliff, increasing the turbulence in the region.

Analysis of the Ocean Boundary Layer influence on the Mobile Tower Integration at the Alcantara Space Center

This work presents a numerical and experimental analysis of the Ocean Boundary Layer (OBL) influence on the formation of the Internal Boundary Layer (IBL) at the Alcantara Space Center (ASC), from where the Brazilian rockets are launched. The numerical simulation was carried out considering a two-dimensional flow with velocity-vorticity formulation for Navier Stokes equations. A 6th order compact finite differences scheme was used for spatial discretization and a 4th order Runge-Kutta scheme with temporal integration. The coastal cliff along the shoreline in the ASC neighborhood was specified trough the immersed boundary technique. The experimental analysis was carried out in a subsonic wind tunnel using a twodimensional Particle Image Velocimetry (PIV) system. The measurements were carried out considering the irregularity of the coastal cliff. The results confirmed that OBL height influences the height of Internal Boundary Layer that reaches the Mobile Integration Tower (MIT).

IMPACTO DA ALTURA DAS FALÉSIAS NA GERAÇÃO DE TURBULÊNCIA

1. Introducao Existem muitas falesias espalhadas pelo mundo com as mais diversas formas e tamanhos. A existencia dessas falesias causa a alteracao das correntes de ar que passam sobre elas, gerando uma zona de recirculacao turbulenta, caracterizada como camada limite interna (CLI), conforme Fig. 1. E importante saber qual a dimensao dessa camada para entender as influencias que ela pode ocasionar quando ha, a jusante dessas falesias, cidades, balnearios, fabricas, aeroportos e outros. Esse trabalho mostra o comportamento do escoamento para o caso de falesias simples (ângulo de 90o) de ate 30 m de altura, com variacoes de velocidade do vento de 5 a 10 m s-1 a sua jusante (Figura 1).