The Advanced URANUS Navier-Stokes Code for the Simulation of Nonequilibrium Re-entry Flows

Fertig, Markus; Herdrich, Georg

doi:10.2322/tstj.7.pe_15

Cited by 17 publications

(6 citation statements)

References 21 publications

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“…Alongside the calculation of spectra, the input file features the option to interface with radiation transport codes and computational fluid dynamics codes (Fertig and Herdrich 2009).…”

Section: Emission Simulation and Plasma Radiation Database (Parade)mentioning

confidence: 99%

Extension of the plasma radiation database PARADE for the analysis of meteor spectra

Loehle

Eberhart

Zander

et al. 2021

Meteorit & Planetary Scien

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The advancement in the acquisition of spectral data from meteors, as well as the capability to analyze meteoritic entries in ground testing facilities, requires the assessment of the performance of software tools for the simulation of spectra for different species. The Plasma Radiation Database, PARADE, is a line‐by‐line emission calculation tool. This article presents the extensions implemented for the simulation of meteor entries with the additional atomic species Na, K, Ti, V, Cr, Mn, Fe, Ca, Ni, Co, Mg, Si, and Li. These atoms are simulated and compared to ground testing spectra and to observed spectra from the CILBO observatory. The diatomic molecules AlO and TiO have now been added to the PARADE database. The molecule implementations have been compared to the results of a simple analytical program designed to approximate the vibrational band emission of diatomic molecules. AlO and TiO have been identified during the airborne observation campaigns of re‐entering man‐made objects WT1190F and CYGNUS OA6. Comparisons are provided showing reasonable agreement between observation and simulation.

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“…Alongside the calculation of spectra, the input file features the option to interface with radiation transport codes and computational fluid dynamics codes (Fertig and Herdrich 2009).…”

Section: Emission Simulation and Plasma Radiation Database (Parade)mentioning

confidence: 99%

Extension of the plasma radiation database PARADE for the analysis of meteor spectra

Loehle

Eberhart

Zander

et al. 2021

Meteorit & Planetary Scien

View full text Add to dashboard Cite

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“…Transition intensities were corrected for by considering the branching method, self absorption and black body limited systems. The study compared gathered data to simulations predicting the system with equilibrium chemistry (PITOT), and to predictions with non-equilibrium chemistry, multi-temperature models, and loose radiation coupling (URANUS, PARADE and HERTA) [10]. Good agreement was found with the non-equilibrium codes when considering the electron temperature and electron density in the equilibrium region of the flow (post-shock).…”

Section: Introductionmentioning

confidence: 99%

Expansion Fan Spectroscopy of Ionising Super Orbital Flows

Kelly¹,

Gildfind²,

McIntyre³

2019

Proceedings of the 32nd International Symposium on Shock Waves (ISSW32 2019)

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This paper reports on the use of spectral techniques for probing properties of a radiating flow through a rapid expansion. Experiments were conducted to measure relative excited state populations in ionising super-orbital expanding flows. The X2 expansion tube, located at The University of Queensland, was used to generate super-orbital conditions and provide a sample case of high speed gas moving through a shock layer and into an expansion fan. Spectrometers were used to monitor the electronic energy levels of argon by measuring electromagnetic radiation at visible and infra-red wavelengths. This configuration was found to be capable of measuring temperature integrated over a two-dimensional plane in space. Excitation temperatures were found to increase from 7500K to 10000K between the shock and expansion fan. Numerical simulations of the flow showed a similar trend although simulated temperatures were lower than measured values. Interesting phenomena were also measured showing that the excitational temperature before the shock and in the expansion fan may be influenced by radiation from the post shock pre-expansion fan region.

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“…Measurements of electronic excitation temperature and particle densities of atoms, ions, and electrons (N, O, N + , O + , e − ) are presented, these are obtained by analyzing the radiative transport of atomic lines [2630]. Comparisons are presented between (i) measurement results, (ii) a numerical simulation utilizing equilibrium chemistry (PITOT), and (iii) a detailed numerical simulation utilizing nonequilibrium chemistry, multi-temperature models, and loose radiation coupling (URANUS, HERTA, PARADE) [31,32].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Emission Spectroscopy for Superorbital Reentry in Expansion Tube X2

Hermann¹,

Löhle²,

Bauder³

et al. 2017

Journal of Thermophysics and Heat Transfer

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A superorbital re-entry ow was realized in the X2 expansion tunnel of the Centre for Hypersonics of the University of Queensland resulting in measurements of electronic excitation temperature, electron density, and particle densities of neutral and ionized atomic nitrogen and oxygen. A rectangular cold wall model is exposed to a ow corresponding to a 12.2 km/s ight equivalent velocity. Vacuum ultraviolet optical emission spectroscopy in the wavelength range between 116 and 185 nm is conducted through a window at the stagnation point. Spatially resolved optical emission spectroscopy of the stagnation streamline in the near infrared wavelength range from 695 to 880 nm is conducted analyzing the ow from the side. Population densities of excited atomic states, electronic excitation temperatures, and electron and ion densities are determined by analyzing the radiative transport in the oweld. Additionally, the oweld is numerically simulated using the code URANUS. Agreement in electron density (±6%) and electron temperature (±8%) in the equilibrium region is observed between the numerical simulations and the measurement. Signicant dierences between measurement and simulation in the distribution of the electron temperature at

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The Advanced URANUS Navier-Stokes Code for the Simulation of Nonequilibrium Re-entry Flows

Cited by 17 publications

References 21 publications

Extension of the plasma radiation database PARADE for the analysis of meteor spectra

Extension of the plasma radiation database PARADE for the analysis of meteor spectra

Expansion Fan Spectroscopy of Ionising Super Orbital Flows

Quantitative Emission Spectroscopy for Superorbital Reentry in Expansion Tube X2

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