Search

CN-122021477-A - Gate leakage flow simulation system based on parameterization and self-adaptive grid

CN122021477ACN 122021477 ACN122021477 ACN 122021477ACN-122021477-A

Abstract

The invention discloses a gate leakage simulation system based on parameterization and self-adaptive grids, which comprises a parameterization grid generation module, a dynamic self-adaptive grid module and an integration platform, wherein the parameterization grid library module stores a reference grid library generated at fixed gate opening intervals, generates a geometrically accurate simulation grid for any target gate opening based on an intelligent matching and interpolation algorithm, dynamically adjusts the resolution of a local grid according to the phase fraction gradient of a gas-liquid interface in a transient multiphase flow solving process, and the integration platform automatically schedules simulation tasks, monitors calculation resources and solves the process to complete the end-to-end flow control of parameter input to result output. Compared with the prior art, the gate leakage flow simulation system based on parameterization and self-adaptive grids has the advantages of being highly integrated and achieving systematic jump of simulation precision, efficiency and automation level.

Inventors

  • JIA CHENGQI
  • LAI XIANGLING
  • WU JIANMING

Assignees

  • 浙江远算科技有限公司

Dates

Publication Date
20260512
Application Date
20260414

Claims (8)

  1. 1. The gate leakage flow simulation system based on the parameterization and the self-adaptive grid is characterized by comprising a parameterization grid generation module, a dynamic self-adaptive grid module and an integration platform; The parameterized grid library module stores a reference grid library generated at fixed gate opening intervals, and generates a geometrically accurate simulation grid for any target gate opening based on an intelligent matching and interpolation algorithm; The dynamic self-adaptive grid module dynamically adjusts the resolution of the local grid according to the phase fraction gradient of the gas-liquid interface in the transient multiphase flow solving process; The integrated platform automatically schedules simulation tasks, monitors computing resources and solves the process, and completes end-to-end flow control of parameter input to result output.
  2. 2. The gate leakage flow simulation system based on the parameterized and adaptive grids of claim 1, wherein the parameterized grid generation module comprises a parameterized geometric modeling unit, a reference grid library construction unit, an intelligent interpolation unit and a self-learning unit; the parameterized geometric modeling unit constructs parameterized geometric models of the gate and upstream and downstream river channels, and the reference grid library construction unit generates grids at preset opening intervals and associates grid quality metadata; The intelligent interpolation unit generates new geometry through linear interpolation of the geometric parameters of adjacent openings, automatically repartition of grids, and the self-learning unit stores the newly generated grids into a grid library.
  3. 3. The gate leakage simulation system based on the parameterized and adaptive grid of claim 2, wherein key parameters in the parameterized geometric modeling unit comprise gate width, height, opening and arc radius.
  4. 4. The gate leakage flow simulation system based on parameterized and adaptive mesh of claim 2, wherein the mesh quality metadata associated with the reference mesh library construction cells comprises a cell volume greater than zero, a cell jacobian matrix determinant greater than 0.2, a mesh aspect ratio less than 5, no hanging nodes, and a perfect mesh match between adjacent mesh cells.
  5. 5. The gate leakage flow simulation system based on parameterized and adaptive grids of claim 1, wherein the dynamic adaptive grid module comprises an interface monitoring unit and a dynamic encryption unit; the interface monitoring unit calculates the phase fraction gradient in real time in the transient solving process so as to identify the position of the gas-liquid interface; The dynamic encryption unit presets a thinning threshold and a coarsening threshold; Local mesh encryption is automatically triggered when the phase fraction gradient is above a refinement threshold, And when the grid resolution is lower than the coarsening threshold, automatically triggering coarsening of the grid, and completing dynamic optimization of the grid resolution.
  6. 6. The gate leakage simulation system based on parameterized and adaptive grids of claim 5, wherein the refinement threshold and coarsening threshold are set to 0.5 and 0.2 times the local grid size, respectively; the dynamic self-adaptive grid module further comprises a grid scale control unit; And the grid scale control unit dynamically adjusts the grid size growth rate according to the flow field characteristics of the gas-liquid interface.
  7. 7. The gate leakage simulation system based on parameterized and adaptive grids of claim 1, wherein the integrated platform comprises a task scheduling unit, a monitoring unit and a post-processing unit; The task scheduling unit receives working condition parameters, automatically completes the splicing of gate grids and background grids and the configuration of a solver, and submits simulation tasks to a high-performance computing cluster; the monitoring unit analyzes the output data of the solver and monitors the convergence state of the residual error and the utilization rate of the computing node resources; And the post-processing unit automatically extracts key results of leakage flow, water surface line and pressure distribution after the simulation is completed, and generates a visual report.
  8. 8. The use of a gate leakage simulation system based on parameterized and adaptive grids according to any one of claims 1-7 in radial gate, planar gate or flap gate leakage simulation in hydraulic engineering.

Description

Gate leakage flow simulation system based on parameterization and self-adaptive grid Technical Field The invention relates to the technical field of Computational Fluid Dynamics (CFD) simulation and hydraulic engineering, in particular to a gate leakage flow simulation system based on parameterization and self-adaptive grids. Background In the design, scheduling and safety evaluation of hydraulic engineering, the accurate CFD simulation of the gate leakage process is important. However, to achieve efficient and accurate full-flow simulation, multiple challenges remain: (1) The target opening is mismatched with the grid library, and simulation precision loss is caused. In the prior art, in order to improve efficiency, a series of grid libraries with discrete opening degrees (such as intervals of 0.5 m) are generated in advance, however, when the target opening degrees are not matched with the opening degrees in the libraries, only an approximate grid can be selected for simulation. The method of approximately replacing the accurate method can introduce geometric deviation and seriously affect the calculation accuracy of flow fields, cavitation characteristics and flow coefficients near the gate. (2) Lacks intelligent adaptation to dynamic gas-liquid interfaces. In flow field simulation, accurate capture of a gas-liquid interface (free water surface) is a key for ensuring the accuracy of leakage flow and flow state simulation, the conventional method is mostly dependent on a manual preset encryption area or a fixed grid strategy, cannot adapt to complex evolution of the free water surface, and although the adaptive encryption technology is used for capturing characteristics of cavitation interfaces and the like, a deeper challenge is how to intelligently integrate the characteristics with a parameterized model and an automatic flow, so that dynamic encryption based on physical characteristics is truly realized. (3) And an end-to-end full-automatic simulation pipeline is lacking. Existing gate leakage simulation flows are typically fractured and rely on manual intervention. From geometric modeling, grid division and solver setting to calculation monitoring and post-processing, each link often needs to be manually operated on different software platforms, and the degree of automation is low. The method is low in efficiency, is difficult to realize multi-working condition batch calculation, cannot effectively utilize the supercomputer resources, and is lack of deep integration with a professional CFD pre-simulation processing (grid generation and processing) flow, and an end-to-end automatic pipeline from parameter input to result output cannot be formed although a plurality of supercomputer platform-oriented resource monitoring and scheduling technologies exist. In summary, the existing gate leakage simulation technology has a core short board in the aspects of geometric fidelity, interface self-adaption and process automation. The method has the advantages of insufficient precision, low calculation efficiency and difficult large-scale application when facing nonstandard working conditions, and fundamentally restricts the effective popularization of the technology in actual engineering. Disclosure of Invention The technical problem to be solved by the invention is to overcome the technical defects, and provide a gate leakage flow simulation system based on parameterization and self-adaptive grids, which is highly integrated and realizes systematic jump of simulation precision, efficiency and automation level. In order to solve the technical problems, the gate leakage flow simulation system based on parameterization and self-adaptive grids comprises a parameterization grid generation module, a dynamic self-adaptive grid module and an integration platform; The parameterized grid library module stores a reference grid library generated at fixed gate opening intervals, and generates a geometrically accurate simulation grid for any target gate opening based on an intelligent matching and interpolation algorithm; The dynamic self-adaptive grid module dynamically adjusts the resolution of the local grid according to the phase fraction gradient of the gas-liquid interface in the transient multiphase flow solving process; The integrated platform automatically schedules simulation tasks, monitors computing resources and solves the process, and completes end-to-end flow control of parameter input to result output. Preferably, the parameterized grid generating module comprises a parameterized geometric modeling unit, a reference grid library constructing unit, an intelligent interpolation unit and a self-learning unit; the parameterized geometric modeling unit constructs parameterized geometric models of the gate and upstream and downstream river channels, and the reference grid library construction unit generates grids at preset opening intervals and associates grid quality metadata; The intelligent interpolation unit gen