Conveners
Collisional Radiative Modelling
- Aaron Brandis (AMA Inc / NASA Ames)
Collisional Radiative Modelling
- Thierry Magin (von Karman Institute for Fluid Dynamics)
The first observations of Laser Induced Breakdown (LIB) in gases were made upon the days of the invention of lasers and were initially reported by Maker. In those experiments it was observed that, gases which are normally transparent to optical radiation (e.g., Air), could be transformed in high-temperature plasmas by focusing a laser beam onto a small volume. When the operating conditions...
INTRODUCTION
A broad range of high-enthalpy and plasma technology applications exhibit thermochemical nonequilibrium effects, ranging from solar physics and thermal plasmas [1], combustion and plasma-assisted ignition [2], diagnostics [3], and materials technology in general. In aerospace applications, the radiative heat flux to the heat shield of planetary entry probes [4] depends on the...
Carbon dioxide radiative prediction is an important aspect in many scientific and industrial applications. Highly accurate databases such as HITRAN \cite{GORDON20173}, HITEMP \cite{ROTHMAN20102139} or CDSD \cite{TASHKUN2003165}\cite{TASHKUN20111403} are designed to reconstruct the spectrum in a given temperature accurately. However, in the context of atmospheric entry these databases have some...
In order to represent the interactions between particles composing chemical systems of practical interest for the hypersonic community, such as N2 + N [1], CO + O and O2 + C [2], and O2 + O [3], during the last decade a variety of Potential Energy Surfaces (PESs) has been computed starting from the first principle of quantum physics. The accuracy of these potentials, together with the...
- Introduction
The reentry of space debris is a major safety concern. Since only part of the debris are destroyed in the atmosphere, it is essential to be able to characterize the size, number and impact zone of the remaining fragments. Estimating the survivability of an object and its trajectory requires an accurate knowledge of the aerothermodynamics of the shock layer surrounding it.
At...
The current study is aimed at developing a simulation framework that is rooted in ab-initio theory and deals with thermal, chemical, and radiative non-equilibrium during hypersonic planetary entry in a unified manner. Computing the population of individual energy states or the radiative intensity corresponding to a given frequency is unfeasible, even for the simplest flow problem, owing to the...
This work presents the STELLAR (State-To-State ELementARy Rates) database update for CO$_2$, providing a dataset suited for the modeling of vibrationally-specific excitation (V--T) and dissociation (V--D) processes in Carbon Dioxide.
The implemented datasets provide a better and more physically consistent description of the physical-chemical processes in emerging applications (such as...
