Journal ArticleDOI
Tungsten and Molybdenum Ablation Modeling for Re-entry Applications
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TLDR
In this article, a gas diffusion-limited thermochemical ablation and liquid phase removal is proposed for tungsten, tengsten/25% rhenium, and molybdenum, and a good correlation for high and low-pressure arcjet tests, ballistic range firings, and sounding rocket flights has been obtained with these models.Abstract:
Refractory metals are attractive candidates for re-entry vehicle nosetips due to their high resistance to water droplet and ice particle erosion. Ablation models are presented for tungsten, tungsten/25% rhenium, and molybdenum, including gas diffusion-limited thermochemical ablation and liquid phase removal. Chemical eqtilibrium is assumed in the gas phase with kinetics for tungsten ablation considered only at the ablating surface. These models have been incorporated into computer programs that also include shape change, boundarylayer transition, surface roughness, and two-dimensional transient conduction. Good correlation for highand low-pressure arcjet tests, ballistic range firings, and sounding rocket flights has been obtained with these models.read more
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Journal ArticleDOI
Science and technology of polymeric ablative materials for thermal protection systems and propulsion devices: A review
TL;DR: In this article, a review of the state-of-the-art efforts on polymeric ablative materials is presented, starting from the state of the art solutions currently used as TPS, up to covering the most recent efforts for nanostructuring their formulations.
Proceedings ArticleDOI
Roughness Considerations for the HIFiRE-1 Vehicle
TL;DR: In this paper, the authors describe several correlations for distributed nose tip roughness and discrete frustum roughness in the Hypersonic International Flight Research Experimentation (HIFiRE) program, a hypersonic flight test program executed by the Air Force Research Laboratories (AFRL) and Australian Defence Science and Technology Organization (DSTO).
Journal ArticleDOI
Heat transfer—a review of 1976 literature
E. R. G. Eckert,E. M. Sparrow,Richard J Goldstein,C.J. Scott,Emil Pfender,Suhas V. Patankar,James W. Ramsey +6 more
TL;DR: A review of the literature on heat transfer can be found in this article, where a number of books dealing with heat transfer or including heat-transfer topics have appeared on the market.
Journal ArticleDOI
Unified Computer Model for Predicting Thermochemical Erosion in Gun Barrels
TL;DR: In this paper, the first known gun barrel thermochemical erosion modeling code is presented, which provides the necessary missing element needed for developing a generalized gun barrel erosion modelling code that can provide analysis and design information that is unattainable by experiment alone.
Reference EntryDOI
Composite Materials: Ablative
Maurizio Natali,Luigi Torre +1 more
TL;DR: The concept of ablation can be related to a geological term at least 160 years old as discussed by the authors which is derived from the suppletive past participle of the Latin “auferre” which means to carry away.
References
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Computer Program for Calculation of Complex Chemical Equilibrium Compositions and Applications II. Users Manual and Program Description. 2; Users Manual and Program Description
Bonnie J. McBride,Sanford Gordon +1 more
Computer Program for Calculation of Complex Chemical Equilibrium Compositions, Rocket Performance, Incident and Reflected Shocks, and Chapman-Jouguet Detonations
Sanford Gordon,Bonnie J. McBride +1 more
TL;DR: Computer program is described for numerical solution of chemical equilibria in complex systems by using nonlinear algebraic equations using free-energy minimization technique.
Book
Thermodynamics of certain refractory compounds
TL;DR: Theoretical and experimental studies of the thermodynamics of certain refractory compounds from 298.15° to bOOO'K were conducted by Wittebort as discussed by the authors.
Journal ArticleDOI
Heat transfer—a review of 1976 literature
E. R. G. Eckert,E. M. Sparrow,Richard J Goldstein,C.J. Scott,Emil Pfender,Suhas V. Patankar,James W. Ramsey +6 more
TL;DR: A review of the literature on heat transfer can be found in this article, where a number of books dealing with heat transfer or including heat-transfer topics have appeared on the market.