Characterization of non-Boltzmann CN X2Σ+ behind shock waves in CH4–N2 via broadband ultraviolet femtosecond absorption spectroscopy

V Radhakrishna, RJ Tancin… - The Journal of Chemical …, 2023 - pubs.aip.org
This article describes the temporal evolution of rotationally and vibrationally non-Boltzmann
CN X 2 Σ+ formed behind reflected shock waves in N 2–CH 4 mixtures at conditions relevant …

Broadband ultrafast-laser-absorption measurements of NO2 absorption cross-sections from 430 to 500 nm at high temperatures behind shock waves

RJ Tancin, V Radhakrishna, CS Goldenstein - Journal of Quantitative …, 2024 - Elsevier
This work presents broadband spectrally resolved measurements of the absorption cross-
section of NO 2 from approximately 430 to 500 or 580 nm, depending on temperature, with a …

Additively Manufactured Micro‐and Nano‐Al/PVDF Ignition Sensitivity and Burning Characterization

KE Uhlenhake, DN Collard… - Propellants …, 2023 - Wiley Online Library
Aluminum (Al) and polyvinylidene fluoride (PVDF) composites can be used in many unique
applications in the field of energetic materials. Due to their low melting point, many PVDF …

A 100 kHz TDLAS Diagnostic for Characterizing Non-Equilibrium CN Formed Behind Shock Waves in N2-CH4 Mixtures

JL Vera, V Radhakrishna, CJ Schwartz… - AIAA AVIATION 2023 …, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-4383. vid A tunable diode laser
absorption spectroscopy (TDLAS) diagnostic was developed to characterize the …

Rotational and Vibrational Temperature Measurements of CN Χ2Σ+ Behind Shock Waves using Ultrafast-Laser-Absorption Spectroscopy in the UV

V Radhakrishna, RJ Tancin… - AIAA SCITECH 2023 …, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-2087. vid This article describes the
characterization of the temporal evolution of non-Boltzmann CN X formed behind strong …

A Quantum-Cascade-Laser-Absorption-Spectroscopy Diagnostic for Measuring Temperature and Nitric Oxide at 1 MHz in Shock-Heated Air

JJ Gilvey, CS Goldenstein - AIAA Aviation 2023 Forum, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-4267. vid This work presents a
laser absorption spectroscopy diagnostic capable of measuring temperature and NO partial …

Ultrafast-Laser-Absorption Imaging for 1D Measurements of Temperature and CN via the Ultraviolet B2Σ+X2Σ+ Bands

V Radhakrishna, RJ Tancin… - AIAA SCITECH 2022 …, 2022 - arc.aiaa.org
Understanding the spatiotemporal evolution of CN is important to both combustion,
propulsion, and planetary research. In combustion, CN plays an important role in several …

A Mid-Infrared Laser Absorption Spectroscopy Diagnostic for Measuring Air Temperature, Pressure, and Mass Flux at 500 kHz via Ambient CO2

DJ Londrico, CJ Schwartz, RJ Tancin… - AIAA SCITECH 2023 …, 2023 - arc.aiaa.org
View Video Presentation: https://doi. org/10.2514/6.2023-1177. vid his work describes the
development and initial application of a mid-infrared laser absorption spectroscopy (LAS) …

Characterization of Non-Equilibrium CN via the B2Σ+X2Σ+ and A2Π←X2Σ+ Electronic Systems Using Laser Absorption Spectroscopy

V Radhakrishna, JL Vera… - AIAA SCITECH 2024 …, 2024 - arc.aiaa.org
This article presents laser absorption spectroscopy (LAS) measurements of CN internal
temperatures and mole fraction acquired behind reflected shock waves in a mixture of 2.2 …

Characterization of a Multi-Anode PMT for High Bandwidth Optical Emission Spectroscopy Measurements for Hypersonic Flow

AD Plumadore, A Satija, DJ Londrico… - AIAA SCITECH 2024 …, 2024 - arc.aiaa.org
Optical emission spectroscopy (OES) is a single ended measurement technique capable of
high-speed spectral acquisition relevant for controls. This paper presents work on the use of …