Geometrical matching in remote in-tube shock compression by an unsteady jet

Autor: D. Ichihara, D. Kuwabara, D. Moriyama, Y. Nakamura, A. Iwakawa, A. Sasoh
Rok vydání: 2022
Předmět:
Zdroj: Shock Waves. 32:373-381
ISSN: 1432-2153
0938-1287
Popis: Based on the Riemann problem in compressible fluid dynamics, if the head of an unsteady jet acts as a physical piston for air compression, a higher-pressure field than that of the kinetic pressure from a steady jet can be generated. In this study, the pressure characteristics of this air compression method, referred to as “remote in-tube air compression,” were evaluated. The generated unsteady jet exhibited a high-pressure region in its central part that effectively acted as a physical piston (piston effect). Depending on the distance between the unsteady jet generator and a cylindrical test section, the overpressure inside the test section reached the maximum value when the cross section of the jet head and the test section were matched. This matching condition was consistent with the in-tube pressure characteristics, thereby yielding an effective method for the remote generation of a high-pressure region using a simple device.
Databáze: OpenAIRE
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