Uncertainty quantification in density estimation from background-oriented Schlieren measurements [PDF]
Measurement science and technology, 2019 We present an uncertainty quantification methodology for density estimation from background-oriented Schlieren (BOS) measurements, in order to provide local, instantaneous, a posteriori uncertainty bounds on each density measurement in the field of view.
Lalit K. Rajendran +4 more
semanticscholar +1 more source
Advanced Materials Technologies, EarlyView.ABSTRACT Real‐time insight into local chemistry is critical for reliable part quality in additive manufacturing, especially laser powder bed fusion (PBF‑LB/M), where rapid thermal cycles and localized evaporation can undermine part performance. Optical emission spectroscopy (OES) offers non‑intrusive, in situ plume monitoring, but detection geometry ...
Philipp Gabriel +4 more
wiley +1 more source
Shock wave boundary layer interaction studied by high-speed schlieren [PDF]
, 2018 Shock wave boundary layer interactions at compression ramps have been examined by high-speed schlieren. A total of six ramps with angles ranging from 20 deg to 30 deg, the ramp angle effect on the SWBLI is thus studied.
Gan, T., Sun, Z., Wu, Y.
core
Experiments on the Richtmyer–Meshkov instability: Small-scale perturbations on a plane interface [PDF]
, 1993 This paper reports the results of measurements of the "visual thickness," obtained from flow visualization experiments by the schlieren method, of initially plane interfaces between two gases under impulsive accelerations.
Brouillette, M., Sturtevant, B.
core +1 more source
Instabilities and soot formation in spherically expanding, high pressure, rich, iso-octane-air flames [PDF]
, 2006 Flame instabilities, cellular structures and soot formed in high pressure, rich, spherically expanding iso-octane-air flames have been studied experimentally using high speed Schlieren cinematography, OH fluorescence, Mie scattering and laser induced ...
Al-Shahrany A S +6 more
core +1 more source
Multidirectional Motion Strategy of Miniature Water Surface Robot Actuated by Single Exciter
Advanced Robotics Research, EarlyView.A novel multidirectional motion strategy on the water surface based on a single exciter is proposed, and a single‐exciter single‐plate module is developed for actuation. The driving forces generation mechanism of the module is revealed from the perspective of the asymmetric surface wave field.
Haoxuan He +4 more
wiley +1 more source
Design of a Schlieren system for low enthalpy hypersonic flow visualization in GHIBLI facility and development of image processing and quantitative analysis codes with preliminary application to sonic free jet [PDF]
, 2015 GHIBLI is a 2 MW arc-jet hypersonic facility located at CIRA premises in Capua (Italy), designed for testing candidate TPS materials for re-entry vehicles. Measured data during cold flow tests, i.e.
Carletta, Stefano +4 more
core
Characterization of high-current pulsed arcs ranging from 100--250 kA peak [PDF]
, 2019 In this paper, we present the laboratory study on three experimental setups that produce a free arc channel subjected to the transient phase of a lightning current waveform.
Chemartin, L. +4 more
core +3 more sources
Pocket schlieren: a background-oriented schlieren imaging platform on a smartphone
Experiments in Fluids24 pages, 6 figures, 4 Supplementary ...
Diganta Rabha +4 more
openaire +2 more sources
Quantitative rainbow schlieren deflectometry [PDF]
Applied Optics, 1995 In the rainbow schlieren apparatus, a continuously graded rainbow filter is placed in the back focal plane of the decollimating lens. Refractive-index gradients in the test section thus appear as gradations in huerather than irradiance. Asimple system is described wherein a conventional color CCD array and video digitizer are used to quantify ...
P S, Greenberg +2 more
openaire +2 more sources