Takahiro Ukai

TL;DR: In this article, an experimental investigation was performed on a rectangular open cavity with upstream injection model in a Mach number of 1.9 using a trisonic indraft wind tunnel, where an air jet with a jet-to-freestream momentum flux ratio of J = 1.2, 2.7 and 5.3 was injected upstream of the cavity.

TL;DR: In this article, a rectangular open cavity with upstream dual injectors at a freestream Mach number of 1.9 was investigated using high-speed schlieren photography, particle image velocimetry, and surface oil flow techniques.

TL;DR: In this article, the authors combine the transverse jet injection upstream of a cavity with an impinging shock to see how this interaction influences the cavity flow, since impinging shocks have been shown to enhance mixing of transverse jets.

TL;DR: In this paper, the spatial density distribution related to the thermal flow was experimentally investigated using both qualitative and quantitative schlieren techniques, and the focus of this study was to understand the initial temporal variation of the spatio-temporal variation above the ns-DBD plasma actuator in quiescent air.

TL;DR: In this article, a burst feature is defined as a burst ratio BR = Ton/(1/fint) where the burst feature generates a burst-induced hot plume growing above a ground electrode.