Nick J. Parziale

TL;DR: In this article, the phase speed of turbulent jets of three diameters at speeds between 80 m/s and 300m/s, via cross-correlation of signals from a double focused laser differential interferometer (D-FLDI), was measured and calculated using a beam profiler, and the effect of orienting FLDI bundles parallel with and at a 45° angle to the mean flow direction was assessed.

TL;DR: In this article, an experimental and computational investigation of the unsteady separation behavior of two spheres in Mach-4 flow is carried out, and the qualitative separation behavior and the final lateral velocity of the smaller sphere are found to vary strongly with both the radius ratio and initial alignment angle of the two spheres.

TL;DR: In this article, the slenderbody hypervelocity boundary-layer instability is characterized in the previously unexplored regime where thermo-chemical effects are important, and linear stability and PSE analysis is performed, with fair prediction of the frequency content of the disturbances; however, the analysis over-predicts the amplification of disturbances, and the results of this work have two key implications: 1) the acoustic instability is present and may be studied in a large-scale hyper-velocity reflected-shock tunnel, and 2) the new data set provides a new basis on which the

TL;DR: In this article, a novel method to delay transition in hypervelocity flows in air over slender bodies by injecting CO2 into the boundary layer is presented, and the effect is most pronounced in the frequency bands amplified by the second mode.

TL;DR: In this article, boundary-layer profiles that form over a sharp, hollow cylinder in supersonic flows of air and N${}_{2}$ via a single-laser scheme were investigated.