Optimization Design of Y-Shaped Settling Diversion Wall Based on Orthogonal Test

Abstract

In order to improve the inflow state of the combined sluice-pumping station project with a 15° transverse side angle, a Y-shaped settling diversion wall is designed, which can change its layout form according to the operation conditions of the project. To analyze the flow characteristics of the Y-shaped settling diversion wall with different parameter combinations, an orthogonal test is used in this article. Considering four factors that can affect the flow pattern—the length, width, radian and arc radius of the diversion wall—the rectifying performances of 25 diversion wall schemes were analyzed under two operating conditions. The results show that the radian factor of the Y-shaped settling diversion wall has the greatest influence on its rectification effect. Finally, combined with numerical simulation of the optimal scheme and several other comparison schemes, the best scheme for the parameter combination of the diversion wall of the combined sluice-pumping station with a 15° transverse side angle is obtained.

Design and Optimization of γ-Shaped Settlement Training Wall Based on Numerical Simulation and CCD-Response Surface Method

“…In order to facilitate horizontal comparison, the same calculation model wa lished and meshed on the basis of reference [17] and the error of the number of was controlled within 3%. At the same time, for the sake of calculation accurac ensured, the independence analysis of the calculation grid was carried out [18,19 operational state of pumping and free-draining, the head loss from the intake rive admission section of the inlet channel was selected as the feature index to obtain a grid number.…”

“…In order to facilitate horizontal comparison, the same calculation model was established and meshed on the basis of reference [17] and the error of the number of meshes was controlled within 3%. At the same time, for the sake of calculation accuracy being ensured, the independence analysis of the calculation grid was carried out [18,19].…”

“…According to the method of setting boundary condition in reference [17], in the operational state of pumping, the inlet boundary was set at the admission section of the intake river where the inlet condition adopts the parameter of flow velocity and the outlet boundary was set at the admission section of each inlet channel of the pump station. In the operational state of free-draining, the inlet boundary was still fixed at the admission section of the intake river where the flow velocity was adopted as the inlet condition and the outlet boundary was set at the admission section of the sluice.…”

“…In this case, the research method will be limited to the pre-designed design criteria of the research scheme and the optimal scheme still needs to be further optimized. Xu et al [17] proposed a Y-shaped settlement training wall suitable for the joint hub of a pump station and sluice with 15 • transverse side angle, greatly improving the inflow flow pattern under both the operational state of free-draining and pumping. However, the implementation conditions of this study are limited to the formulation of flow state improvement measures based on a specific project example.…”

“…For the sake of improving the inflow state of the joint hub of pump station and sluice when it is operating, this study designed a γ-shaped settlement training wall fixed at the junction of the sluice and the pump station with its state adjusted automatically in line with the actual working condition. To begin with, based on the research of reference [17], this study reproduced the research model and the relevant method while the schemes of the size parameters combination of the training wall were designed based on the method of central composite design (CCD) of the response surface method, then the parameter sample points were drawn up. Secondly, by selecting the research indicators respectively in the operational state of pumping and free-draining, the scheme was fitted with the response surface model combined with the calculated values of numerical simulation.…”