Supersonic jets, particularly shock-containing jets, often exhibit high-intensity, discrete-
frequency acoustic tones. These tones are the signature of an aeroacoustic resonance loop …

The effects of perturbation-based active flow control on supersonic rectangular twin jets
(SRTJ) over a wide range of nozzle pressure ratios (NPR= 2.77 to 6.7, corresponding to fully …

Free shear layers are building blocks of many flows of interest in applications, including jets,
cavity flows, and separated flows. It was found several decades ago that free shear layers …

Flow control is typically used to manipulate a flow's natural behavior to alter its effects on a
vehicle or system. When active flow control (AFC) is used in aerospace applications, the …

This paper investigates the nonlinear evolution and acoustic radiation of coherent structures
(CS) in the near-nozzle region of a subsonic turbulent circular jet. A CS is taken to be a …

Large-scale coherent structures are present on a subsonic turbulent circular jet and are
known to constitute an important source of jet noise. With these structures being treated as …

An empirical closure model of rectangular twin jets' screech and coupling has been
developed to predict their coupling mode at a given flow condition. It builds on Powell's …

As a methodology complementary to acoustic analogy, the asymptotic approach to
aeroacoustics seeks to predict aerodynamical noise on the basis of first principles by …

In this article the erratic coupling that can occur in screeching supersonic twin jets is
characterised. Non-stationary acoustic analysis is used to investigate the temporal …

By adapting the triple decomposition of an instantaneous turbulent flow into a time-averaged
mean field, large-scale coherent motion and fine-scale random fluctuations, and treating the …