| abstract |
The invention discloses a segmented fuel injection nozzle and an optimized design method thereof. The fuel injection nozzle comprises a needle valve, a needle valve body and a turbulence ring sleeve. The needle valve and the needle valve body are coaxially matched and located inside the needle valve body; The needle valve body is provided with fuel injection holes evenly distributed in the circumferential direction, and the spoiler ring sleeve is provided with a spoiler concave cavity and a bell mouth. The valve body is threadedly connected, and the adjacent boundaries have the same shape and close fit. This structure can enhance the flow performance and atomization performance of the fuel injector at the same time. Based on the segmented fuel injector, the present invention builds a transparent fuel injector internal flow and spray visualization experimental platform; Sensitivity analysis: Establish and train a BP neural network model based on MATLAB, use this model to obtain the optimal solution combination and multi-index weight coefficients, verify the correctness of the results through visual experiments, and complete the optimization of the injector design. |