Method and system for optimizing structure of hydrogen-doped natural gas mixer based on numerical simulation

The invention relates to a hydrogen-doped natural gas mixer structure optimization method and system based on numerical simulation, and the method comprises the steps: building a parameterized geometric model of a hydrogen-doped natural gas mixer, the parameterized geometric model structurally comprising a mixer housing; based on the parameterized geometric model, establishing a CFD model of the hydrogen-doped natural gas mixer; optimizing a first group of design variables, including the length-diameter ratio of the cross section of a shell, the number of mixing units and the distance between adjacent mixing units, based on digital-analog simulation of a CFD model of the hydrogen-doped natural gas mixer by taking the optimal mixing uniformity of the cross section of a flow channel outlet as a target; under the constraint of the optimal value of the first set of design variables, with the optimal mixing uniformity of the cross section of a runner outlet and the minimum pressure drop of a flow field as targets,