RFNC-VNIITF multifunctional shock tube for investigating the evolution of instabilities in nonstationary gas dynamic flows

摘要

The design. operation, and functionality of the multifunctional shock tube (MST) facility at the Russian Federal Nuclear Center-VNIITF are described. When complete, the versatile MST consists of three different driver sections that permit the execution of three different classes of experiments on the compressible turbulent mixing of gases induced by the (1) Richtmyer-Meshkov instability (generated by a stationary shock wave with shock Mach numbers <5), (2) Rayleigh-Taylor instability (generated by compression wave such that acceleration of the interface is < 10(5) g(0), where g(0) = 9.8 m/s(2)). and (3) combined Richtmyer-Meshkov and Rayleigh-Taylor instability (generated by a nonstationary shock wave with initial pressure at the front 5 X 10(6) Pa and acceleration of : 10(6) g(0) of the interface). For each of these types of experiments, the density ratio of the gases is p(2)/p(1) less than or equal to34. Perturbations are imposed on a thin membrane, embedded in a thin wire array of microconductors that is destroyed by an electric current. In addition, various limitations of experimental techniques used in the study of interfacial instability generated turbulent mixing are also briefly discussed. [References: 7]