基于高阶谱差分的CAA模型预测高速列车过隧微气压波
发布时间：2018-09-03 06:20
【摘要】：高速列车以大于300km/h的速度穿越隧道时,在隧道出口形成的微气压波具有较强的非线性。该微气压波幅值的数量级达到102 Pa,难以用传统的CFD方法(2阶精度)精确模拟。基于高阶谱差分的CAA模型是一种值得尝试的方法。CAA方法能在强非线性区域保持流体变量和声学变量的传递精度,高阶谱差分方法能够融入非结构网格,获得较高的计算效率和几何灵活性。本文在动模型试验平台开展200~350km/h速度下的微气压波缩比试验研究;采用基于3阶谱差分的CAA方法,对轴对称圆管模型,数值研究了管口气压爆波的产生和近场辐射特性。数值结果和缩比试验结果的一致性,验证了该数值方法的准确性和可靠性。
[Abstract]:When a high-speed train passes through a tunnel at a speed greater than 300km/h, the microbaric waves formed at the exit of the tunnel have strong nonlinearity. The order of magnitude of the amplitude of the microbaric wave is 102 Pa, which is difficult to be accurately simulated by the traditional CFD method (2 order accuracy). The CAA model based on high-order spectral difference is a method worth trying. The CAA method can maintain the transfer accuracy of fluid and acoustic variables in strongly nonlinear regions, and the high-order spectral difference method can be incorporated into unstructured meshes. High computational efficiency and geometric flexibility are obtained. In this paper, the microbaric wave shrinkage test at 200~350km/h velocity is carried out on the dynamic model test platform, and the generation and near-field radiation characteristics of the barometric detonation wave at the nozzle are numerically studied by using the CAA method based on the third-order spectral difference for the axisymmetric circular tube model. The accuracy and reliability of the numerical method are verified by the agreement between the numerical results and the experimental results.
【作者单位】： 中南大学轨道交通安全教育部重点实验室;
【基金】：国家自然科学基金(51005249,U1134203)
【分类号】：U451.3
，
本文编号：2219149
[Abstract]:When a high-speed train passes through a tunnel at a speed greater than 300km/h, the microbaric waves formed at the exit of the tunnel have strong nonlinearity. The order of magnitude of the amplitude of the microbaric wave is 102 Pa, which is difficult to be accurately simulated by the traditional CFD method (2 order accuracy). The CAA model based on high-order spectral difference is a method worth trying. The CAA method can maintain the transfer accuracy of fluid and acoustic variables in strongly nonlinear regions, and the high-order spectral difference method can be incorporated into unstructured meshes. High computational efficiency and geometric flexibility are obtained. In this paper, the microbaric wave shrinkage test at 200~350km/h velocity is carried out on the dynamic model test platform, and the generation and near-field radiation characteristics of the barometric detonation wave at the nozzle are numerically studied by using the CAA method based on the third-order spectral difference for the axisymmetric circular tube model. The accuracy and reliability of the numerical method are verified by the agreement between the numerical results and the experimental results.
【作者单位】： 中南大学轨道交通安全教育部重点实验室;
【基金】：国家自然科学基金(51005249,U1134203)
【分类号】：U451.3
，
本文编号：2219149
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