Second-Law Methods for the Analysis &amp; Design of Hypersonic Vehicles

Baker, Myles L.; Huang, Jinhua; Riggins, W.; Camberos, A.

doi:10.2514/6.2007-4055

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…The accurate prediction of incident radiative heat load is therefore critical for reducing design margins and mission costs through thermal protection system (TPS) optimization (Baker et al 2007;Berry et al 2007;Braun and Manning 2007). Reliable calculations of radiative fluxes and radiative source strengths in atmospheric entry applications necessitate to use accurate spectroscopic databases allowing to calculate high-temperature gas radiative properties over a wide spectral range (Park et al 1996;Bose et al 2006;da Silva and Dudeck 2006;Colonna et al 2007;Panesi et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Plasma radiation for atmospheric entry at Titan: Emission spectroscopy measurements and numerical rebuilding

Sobbia¹,

Leyland²,

Babou

et al. 2013

J. Plasma Phys.

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Emission spectroscopy measurements on a plasma representative of Titan atmosphere composition were obtained in the Inductively Coupled Plasma wind tunnel facility (VKI-Minitorch) at the von Karman Institute in Belgium. Temperatures ranged from 3600 to 5000 K, pressure was fixed at 300 mbar, and the molar composition was 1.9% CH4 and 98.1% N2. The high-pressure plasma was produced to obtain conditions close to equilibrium. In conjunction, line-by-line calculations have been carried out to assess the reliability of two distinct sets of molecular electronic transition moments, recently released, by predicting the radiative signature of high-temperature N2–CH4 plasma. The radiative transfer problem was solved by considering the plasma plume at local thermodynamic equilibrium conditions in an axisymmetric configuration. Comparisons between the synthetic and experimental spectra demonstrated good agreement for the CN Violet and high-wavelength CN Red bands, while some discrepancies were observed for the C2 Swan bands and low-wavelength CN Red bands.

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Section: Introductionmentioning

confidence: 99%

Plasma radiation for atmospheric entry at Titan: Emission spectroscopy measurements and numerical rebuilding

Sobbia¹,

Leyland²,

Babou

et al. 2013

J. Plasma Phys.

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“…Several combined work potential and exergy analysis metrics have been developed for aerospace applications. [4][5][6] Tracking entropy generation and applying exergy analysis can assist First Law metrics in determining which designs are physically realizable. 7,8 Emphasis has long been placed on the development of new engines that can bridge the performance gap to scramjet design space, and an exergy analysis may be beneficial for analyzing performance trends and making comparisons.…”

mentioning

confidence: 99%

Detonation Engine Performance Comparison Using First and Second Law Analyses

Braun¹,

Lu²,

Wilson³

et al. 2010

46th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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A performance comparison between airbreathing pulsed detonation engine (PDE) and rotating detonation wave engine (RDWE) concepts is made. The flight speed range used for the analysis is approximately Mach 1-5, which is typically thought to be where these concepts are viable and perhaps competitive with each other and Brayton cycle engines. Since the RDWE is ideally capable of operation with a steady state inlet and nozzle, a PDE model with similar steady state systems was developed. The comparison shows a PDE is more efficient at low supersonic speeds, but the relative RDWE performance gradually increases until it becomes comparable. The thermodynamic cycles of these detonationbased engines have been examined in detail using the Second Law to show the losses associated with mixing and purging. Additionally, the combination of an exergy analysis with First Law performance benchmarks proves to be a useful approach for optimization since sources of losses and component interrelationships are easier to identify.

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Second-Law Methods for the Analysis & Design of Hypersonic Vehicles

Cited by 2 publications

References 10 publications

Plasma radiation for atmospheric entry at Titan: Emission spectroscopy measurements and numerical rebuilding

Plasma radiation for atmospheric entry at Titan: Emission spectroscopy measurements and numerical rebuilding

Detonation Engine Performance Comparison Using First and Second Law Analyses

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