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新疆百里风区铁路电气化改造后,风通过挡风墙在接触网处形成的风速和上吹角影响不容忽视。挡风墙位置和高度发生变化时,将直接影响接触网处的风速和上吹角,较大的风速和上吹角将导致弓网故障。采用高雷诺数κ-ε紊流模型进行模拟计算,得出对拉式挡风墙参数变化对接触网的影响,分析确定较好的挡风墙位置和高度参数,从而保证列车的正常运行。计算结果表明:挡风墙位置变化时,风速和上吹角波动较小;挡风墙高度变化时,风速变化很大,高度为3 m和3.4 m风速减小尤为明显。
After the electrification of the railway in the Barry area in Xinjiang, the influence of the wind speed and blowing angle formed by the wind on the catenary at the windscreen can not be ignored. When the location and height of the wind wall change, it will directly affect the wind speed and blowing angle at the catenary. Larger wind speed and blowing angle will lead to bow network failure. Using high Reynolds number κ-ε turbulence model to simulate the calculation, the influence of the parameters of the pull wind wall on the catenary is obtained, and the better position and height parameters of the wind wall are analyzed to ensure the normal operation of the train. The results show that the wind speed and the blowing angle fluctuate little when the position of the wind wall changes. The wind speed varies greatly when the height of the wind wall is changed, especially when the height is 3 m and 3.4 m.