Study of a passive flow velocity acceleration device in open water

For barges staying in inland waters, hydroelectric power generation using the speed of the water itself can provide part of the electrical energy for ships, which can reduce energy consumption and play an important role in energy conservation and environmental protection. The passive flow velocity acceleration device accelerates the water flow and then impacts the water wheel to generate electricity, which can improve efficiency and has certain economic benefits. This paper uses a combination of numerical simulation and model tests to study the passive acceleration effect of the acceleration device in open water under the premise of a certain size of the water inlet and outlet. First taking the most basic arc-shaped cavity as the research object, and the numerical simulation at different speeds is carried out. The research results are compared with the experimental results to verify the reliability of the numerical simulation. On this basis, three improved line types, concave-convex type, micro-concave type and linear type, were designed, and simulation calculations were completed with numerically verified solutions, and the calculation results and speed cloud graphs were analyzed to draw the conclusion that the linear type has the best effect; Model processing and tank tests were performed on the three improved line types, and the test results were in good agreement with the numerical calculation results, which further verified the reliability of the numerical scheme and the credibility of the research results.