A resolvent analysis of Mach wave radiation from an axisymmetric supersonic jets was conducted by a two-dimensional resolvent solver (Linstab2D). The Reynolds-averaged Navier–Stokes (RANS) simulations were assimulated to experimentally obtained PIV data, and the RNAS results were employed as base flow of resolvent analyses. The series of resolvent analyses are conduted. Resolvent modes at different Strouhal numbers and azimuthal modes were computed, and the effects of jet Mach number on propagation of the Mach wave was discussed. Results clearly show Mach-wave propagation patterns at Mach 1.5, 1.8, and 2.0. Furthermore, the Mach-wave propagation angle increases with an increasing jet Mach number. On the other hand, the acoustic source of the higher Strouhal number are located at more upstream side. The axisymmetric mode (m = 0) has the largest gain compared with other azimuthal modes.
Wang et al. (2025) studied this question.
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