SOLUTION OF BLAST WAVES BY THE METHOD OF CHARACTERISTICS
DREXEL INST OF TECH PHILADELPHIA PA
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The numerical method of characteristics is applied to the plane, cylindrical, and spherical blast wave problems. The calculation begins at a constant time line within the blast wave. Along this line, all three flow variables are prescribed according to the similarity solution. Along a fixed back boundary, which lies between the shock front and the time-axis, one flow variable is prescribed. On the other boundary, the strong shock equations apply. When compared to the exact similarity solution, the results of the method of characteristics are found to be accurate to within 1, for all variables along the shock front, after a pressure drop of 99. Also, h2-type extrapolation of calculated results always improves the accuracy, whereas the h- type extrapolation may not.