Diseño e implementación de una balanza aerodinámica para el túnel de viento subsónico de ciclo abierto del LMFT de la Escuela Politécnica Nacional para medición de las fuerzas de arrastre y sustentación

Abstract

The objective of this titling project was to design and build a prototype aerodynamic balance, which allowed the measurement of aerodynamic forces by obtaining drag and lift coefficients, which are generated in the profiles submerged in a fluid. In order to, determine the effectiveness of the prototype, tests were carried out on an aerodynamic profile NACA 0012 of 15 cm rope, 10 samples were taken at each point of interest that are generated by the variation of the angle of attack ranging from -4 to 20 degrees. These values were compared with those issued by the NACA report number 460, which also allowed us to determine the uncertainty value present in the system that has a value of 0.035, and a maximum error percentage in drag coefficient of 75% and 95% in the lift coefficient due to the vibrations present in the wind tunnel during its operation and its incorrect location, which causes a recirculation of the air that influences the test area.