Proceedings ArticleDOI
Radiometer experiment for the aeroassist flight experiment
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In this article, a NASA flight experiment is described that provides an opportunity to obtain a large base of radiometric data for high-altitude, high-velocity thermochemically nonequilibrated-flow conditions.Abstract:
A forthcoming NASA flight experiment is described that provides an opportunity to obtain a large base of radiometric data for high-altitude, high-velocity thermochemically nonequilibrated-flow conditions. As a preliminary to the design of a radiometer for this experiment, an approximate method for predicting both equilibrium and nonequilibrium radiative surface fluxes is described. Spectral results for one trajectory state, a velocity of 10 km/sec at an altitude of 85 km, are presented. These results are then used to develop some of the instrument parameters that will be needed for designing of the three genre of radiometers that are proposed for this experiment.read more
Citations
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Titan atmospheric composition by hypervelocity shock-layer analysis
TL;DR: In this article, a Titan-probe radiometer was used to measure the intensity of the CN(violet) radiation emitted in the shock layer during the high velocity portion of the probe entry between 200 and 400 km altitude.
Hypervelocity atmospheric flight: Real gas flow fields
TL;DR: In this paper, the authors examined flight in the atmosphere from the viewpoint of including real gas phenomena in the flow field about a vehicle flying at hypervelocity, which is subject not only to compressible phenomena, but is dominated by energetic phenomena.
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AFE base flow computations
TL;DR: In this paper, a simulation of the Hypersonic Free Flight Facility (HFFF) aeronautic free flight facility (AFE) simulation is presented, where the simulation results agree reasonably well with the shadowgraphs taken at the HFFF. The simulation results have been coupled with an ideal-gas and a nonequilibrium Navier-Stokes solver.
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Measured specific intensity from 130 to 900 nm at the stagnation point of a model in an arcjet flow of 7.8 km/sec
TL;DR: In this paper, the absolute specific intensity (W/cm2-μ-sr) spectrum (also known as the radiative heating rate spectrum), incident on the stagnation point of a blunt model placed in an arcjet wind tunnel, is presented.
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Effective Radiative Properties of Fibrous Composites Containing Spherical Particles
TL;DR: In this paper, the influence of spherical particles on the radiative properties of high-porosity fibrous composites is examined in terms of extinction, absorption, and scattering coefficients, as well as the scattering phase function of the composites are formulated as the weighted average according to the fractional volume of the constituent particulates.
References
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Journal ArticleDOI
Radiation Enhancement by Nonequilibrium in Earth's Atmosphere
TL;DR: The status of knowledge of shock-layer radiation in the low-density nonequilibrium regime, as appropriate to the flight of the proposed aero-assisted orbital transfer vehicle, is surveyed in this paper.
Journal ArticleDOI
Real-gas flowfields about three-dimensional configurations
TL;DR: In this paper, a factored implicit algorithm is used to determine real gas, inviscid supersonic flow fields over a three-dimensional configuration using an equilibrium composition method, and numerical solutions are presented for both real and ideal gases at three different Mach numbers and at two different altitudes.
Journal ArticleDOI
An imaging spectrometric observatory for spacelab
TL;DR: The Space Shuttle Orbiter Imaging Spectrometric Observatory (ISO) as discussed by the authors is the first instrument able to simultaneously measure the entire spectrum of atmospheric emission, from the extreme UV to the near-IR, with high spectral resolution and high sensitivity while obtaining global and altitude coverage.
Journal ArticleDOI
Composition of the earth's atmosphere by shock-layer radiometry during the PAET entry probe experiment.
TL;DR: In this paper, a determination of the composition of the earth's atmosphere obtained from onboard radiometer measurements of the spectra emitted from the bow shock layer of a high-speed entry probe is reported.
Proceedings ArticleDOI
Benchmark aerodynamic heat-transfer data from the first flight of the Space Shuttle Orbiter
TL;DR: In this article, the authors determined the entry aerodynamic heat transfer data from the first flight of the Space Shuttle Orbiter using a rigorous mathematical analysis of one-dimensional, transient heat conduction within the thermal protection system (TPS) and reradiation from its surface during entry.
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