High-speed train tail jet pneumatic drag reduction numerical simulation analysis method and device

Abstract

The invention discloses a high-speed train tail jet aerodynamic drag reduction numerical simulation analysis method and device, and the method comprises the steps: building a high-speed train turbulence flow field numerical simulation fine model, and setting a solving format; determining an aerodynamic resistance strong correlation special flow part and a tail jet flow position, establishing a high-speed train aerodynamic characteristic numerical simulation calculation model with a jet flow boundary, and determining a jet flow mode parameter set, wherein the parameter set comprises a jet orifice shape, a jet speed, a jet direction and a jet pulsation characteristic; and finally, taking the jet flow port as a speed inlet boundary condition, and according to the parameter set and a high-speed train aerodynamic characteristic numerical simulation calculation model with a jet flow boundary, respectively calculating change curves of aerodynamic resistances of trains at different jet flow port positions along with different jet flow parameters so as to determine an optimal drag reduction scheme. According to the high-speed train tail jet pneumatic drag reduction numerical simulation analysis method, the research period is shortened, the cost is reduced, and the accuracy of a simulation result is improved.

Description

technical field [0001] The invention relates to the technical field of train aerodynamic drag reduction, in particular to a high-speed train tail jet aerodynamic drag reduction numerical simulation analysis method, device, terminal equipment and computer-readable storage medium. Background technique [0002] At present, the energy consumption during train operation is mainly used to overcome running resistance. Under high-speed operation, the air resistance suffered by the train increases sharply with the square of the speed, which poses new challenges to energy saving and environmental protection. The main considerations of drag reduction and energy saving. In the prior art, drag reduction and noise reduction are mainly achieved through specific structural design and local structural optimization of the head shape of high-speed trains, or active control methods for turbulent flow fields. However, the former method of improving the aerodynamic performance of the train by ch...

AI Technical Summary

Problems solved by technology

However, the former method of improving the aerodynamic performance of trains by changing the shape has become more mature and mature, and is limited by the continuous improvement of man-machine space, manufacturing process and design requirements; and this method is mainly applicable to the initial stage of train design , there are problems of long design cycle and high cost

However, the latter still lacks a mechanistic and normative basis on how to achieve precise active jet regulation. If a pure model test method is used, it will also consume a lot of cost and research cycle.

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