Medição Da Velocidade De Escoamento De Vento Em Um Túnel De Vento De Circuito Fechado Utilizando Dois Sensores Em Duplo Range
Authors
Matheus Victor Ramos dos Anjos
Programa de Pós-Graduação em Engenharia Elétrica, Escola de Engenharia da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais
Guilherme de Souza Papini
Dep. de Engenharia Mecânica, Escola de Engenharia da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais
Hugo César Coelho Michel
Dep. de Engenharia Eletrônica, Escola de Engenharia da Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais
In a Closed Circuit Wind Tunnel, the measurement of the wind flow velocity is performed using a Pitot Tube associated with two pressure sensors. A typical instrumentation problem is, for speeds below 10 m/s (an important range for many aerodynamic tests), pressure sensors lose the capacity to provide adequate measures for the speed control of the tunnel. This work aims to relate the possible causes associated with the low precision and accuracy of the system in the mentioned range, to improve the measurement. A measurement using two sensors operating in series, i.e., in a split range is proposed, switching from one sensor to another smoothly. In the end, it is presented the identified problems with the new sensor installed, considering its dynamic and static behavior, relating them to the observed impacts regarding the chosen transition methods.
