Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Experimental identification of drag hydrodynamic parameters for an open frame ROV used in the stock assessment of scallops
Submission Author:
Paola Fonseca , SP , Brazil
Co-Authors:
Paola Fonseca, RICHARD HUAMANI, Juan Pablo Julca Avila
Presenter: Paola Fonseca
doi://10.26678/ABCM.COBEM2023.COB2023-1394
Abstract
This work presents the experimental method to identify the hydrodynamic drag parameters in each degree of freedom of an open frame underwater vehicle to the stock assessment of Peruvian scallops. It describes the mechanical project and hardware used to make the experiments. The method, known as self-propelled tests, is applied to each degree of freedom individually. Then, the drag coefficient and the operating range of the Reynolds number were calculated with the data collected from the tests. The drag coefficient calculated to the linear motions was almost constant in the Reynolds number range between 0.4x10^5 to 1.8x10^5, and the drag coefficient calculated to the angular motion was almost constant in the Reynolds number range between 1.5x10^5 to 6x10^5. The linear and quadratic drag parameters were determined by the least square method in each degree of freedom of the vehicle. The drag parameter values found by the experiments have coherence because the higher parameter value corresponds to the larger projected area, and the lower parameter value to the smaller projected area. The main perturbation force of the vehicle when it moves in the heave direction is the buoyancy force, which coincides by 3% with the perturbation value obtained by the method of least squares, demonstrating that the procedure followed to determine the hydrodynamic parameters is correct.
Keywords
Open-frame underwater vehicle, Parameters experimental identification, Least-square method, Hydrodynamic Modelling
