Estudio y medición experimental del coeficiente de arrastre del casco de un dron submarino por medio de un túnel de viento

The present work aims to study, design and characterize the hull of a submarine drone by means of experimental measurement in a wind tunnel. For this purpose, the concept design of the prototype was carried out, which was built using additive manufacturing. The experimental runs were performed for two types of surfaces, flat and cylindrical, on the drone hull head. Using the Re determined the test velocities in air were 8, 10, 12, 14 and 16 m/s. From the experimental runs, the drag force, was measured, and from the adjustment, it was estimated that the bias error is less than 6%, so it can be said that the error in the measurements is acceptable, and the scaling of the results can be performed. The results of the drag coefficient showed the reduction by boundary layer growth and from the comparison of the planar and cylindrical gemetires on the dron hull head showed that the of the cylindrical surface is 33.14 and 10.71% larger compared to the of the planar surface. To validate in a better way the obtained results were copared with other designs of hull geometries have a lower , approximately 63.33%, therefore this design does not present the best result in drag comparison with these surfaces, in the comparison with drones that do not have hull and are geometries of rectangular section, 97.48% less drag, therefore it can be indicated that this design has a better performance in comparison with these geometries. Finally, it can be concluded that the geometry proposed in this study has the necessary length to reduce drag due to a boundary layer with a flat surface to have improved performance compared to drones that do not have hull.