Characteristics Method Applied to Blast Waves in a Real Gas

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  • D311 特性曲線法による実在気体中の爆風

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Abstract

The effect of real gas in air on blast waves was investigated. The characteristics method was applied to analyze the problem of the one dimensional unsteady flow of a real gas by making use of the Hartree technique. To give the initial values along a constant time line the quasi-similarity solution was utilized. It is shown that the equation governing the flow field behind shock front can be computed in a similar way to the flow of a perfect gas by introducing an isentropic index in the present analysis. The results show that the decay line of the real gas decrease less than that of the perfect gases and the isentropic index plays an important role through the analysis.

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