Meteorite temperature measurements during ground testing

D Leiser, C Dürnhofer, E Poloni, S Löhle, P Matlovič… - Icarus, 2024 - Elsevier
Ground testing meteorite samples offer in-situ measurements of known materials in
conditions that occur during entry into Earth's atmosphere. 22 meteorite samples with a wide …

Line-of-sight gas radiation effects on near-infrared two-color ratio pyrometry measurements during plasma wind tunnel experiments

A Fagnani, B Helber, A Hubin, O Chazot - Measurement, 2024 - Elsevier
Two-color ratio pyrometry is commonly used to measure the surface temperature of
aerospace materials during plasma wind tunnel experiments. However, the effect of the …

Overview of the MetSpec project-Artificial meteors in ground testing

J Tóth, P Matlovič, S Loehle, J Vaubaillon… - Icarus, 2024 - Elsevier
We provide an overview of the MetSpec project, which aims to connect meteorite ablation
laboratory experiments with meteor spectral observations in the atmosphere aiming at the …

Spallation of carbon ablators in arcjet facility experiments

F Grigat, S Löhle, M Eberhart, A Meindl… - … of Thermophysics and …, 2023 - arc.aiaa.org
Spallation is the mostly undesirable phenomenon where solid particles are ejected from
ablative materials leaving less mass to be decomposed at the ablator surface. The exact …

Filtered image thermography for high temperatures in hypersonic preheated ablation experiments

R Ravichandran, DR Buttsworth, SW Lewis… - … of Thermophysics and …, 2019 - arc.aiaa.org
Thermography for measuring high temperatures, ranging from 1000 to 2900 K, in hypersonic
preheated ablation experiments is demonstrated in this work. Filtered images at different …

Fire ember pyrometry using a color camera

DK Kim, PB Sunderland - Fire safety journal, 2019 - Elsevier
Firebrands can dramatically increase the hazards of wildland fires. While embers have been
extensively studied, little is known about their temperatures. To address this an imaging …

Aerothermodynamic effects of controlled heat release within the hypersonic shock layer around a large angle blunt cone

S Deep, G Jagadeesh - Physics of Fluids, 2018 - pubs.aip.org
Effects of controlled heat addition into the high temperature, chemically reacting shock layer
of a large angle (60◦) blunt cone with a spherical nose have been experimentally …

Combining thermal imaging and spectral pyrometry for express temperature mapping in additive manufacturing

MY Grishin, PA Sdvizhenskii, RD Asyutin… - Applied Optics, 2023 - opg.optica.org
A compact and low-cost two-dimensional (2D) thermal imager was developed for real-time
temperature mapping of a melt pool during coaxial laser cladding (the additive …

Temperature characterization of a radiating gas layer using digital-single-lens-reflex-camera-based two-color ratio pyrometry

S Deep, Y Krishna, G Jagadeesh - Applied optics, 2017 - opg.optica.org
The two-color ratio pyrometry technique using a digital single-lens reflex camera has been
used to measure the time-averaged and path-integrated temperature distribution in the …

Spectrally filtered imaging and vacuum ultraviolet spectroscopy of preheated models in X2

UA Sheikh, H Wei, SW Lewis, CM James, P Leyland… - AIAA Journal, 2017 - arc.aiaa.org
This study presents calibrated vacuum ultraviolet spectroscopic measurements and filtered
cyanogen violet band images for steel, cold graphite, and preheated graphite models at …