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摘要: 采用三阶精度PPM(Parabolic Piecewise Method)方法和VOF(Volume of Fluid)相结合,运用Lagrange-Remapping算法,编制了多介质流体高精度欧拉计算程序MFPPM,可以对多介质复杂流场进行数值计算。对程序计算精度进行了测试,并应用于超高速发射实验模型数值计算,对Sandia实验室不带会聚作用的实验模型进行了一维计算以及带会聚作用的实验模型进行二维计算并与其实验结果和CTH计算结果进行对比,其中一维计算最大相对误差1%,二维计算相对误差4.7%,在此基础上对超高速发射设计模型进行了初步计算。Abstract: Based on multi-fluid VOF and PPM methods, we develop a MFPPM shock wave physics code to simulate the experiment configuration of the hypervelocity launcher and test the resolution of the algorithms in this code. By using the MFPPM, we simulate some experimental hypervelocity launchers from Sandia National Laboratories, and obtain the numerical results with maximal relative error 1% to 1D, 4.7% to 2D problems compared to that experiments and CTH simulations. Also, a designed model of hypervelocity launcher is simulated too, and some results are given in this paper.
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Key words:
- PPM /
- multi-fluid /
- hypervelocity launch /
- high resolution algorithm
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