Aerothermodynamics for reusable launch systems

Weiland, Claus; Longo, J.M.A.; Gülhan, Ali; Decker, Klaus

doi:10.1016/j.ast.2003.09.003

Cited by 14 publications

(3 citation statements)

References 10 publications

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“…They believed that although it is possible for CFD to accurately predict the aerodynamic environ ment of hypersonic vehicles (including surface pressures and forces/moments), CFD is severely limited in accurately predicting the aerothermodynamic environment of these vehicles. Weiland et al (2004) add to the list of difficulties with local aerother modynamic flows (such as flows in deflected flaps and rudders or in gaps between tiles), high-enthalpy flows (including radiation cooling), wall catalycity, turbulence modeling, and jet/airflow interaction. In spite of all these issues, Mehta (1993) be lieves that CFD will be as important as ground and flight testing in the development of future hypersonic flight vehicles.…”

Section: Methodsmentioning

confidence: 99%

Critical Hypersonic Aerothermodynamic Phenomena

Bertin

Cummings

2006

Annu. Rev. Fluid Mech.

244

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The challenges in understanding hypersonic flight are discussed and critical hyper sonic aerothermodynamics issues are reviewed. The ability of current analytical meth ods, numerical methods, ground testing capabilities, and flight testing approaches to predict hypersonic flow are evaluated. The areas where aerothermodynamic short comings restrict our ability to design and analyze hypersonic vehicles are discussed, and prospects for future capabilities are reviewed. Considerable work still needs to be done before our understanding of hypersonic flow will allow for the accurate pre diction of vehicle flight characteristics throughout the flight envelope from launch to orbital insertion.

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Section: Methodsmentioning

confidence: 99%

Critical Hypersonic Aerothermodynamic Phenomena

Bertin

Cummings

2006

Annu. Rev. Fluid Mech.

244

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“…A great deal of literature has been published. Please refer to [1][2][3][4][5][6][7][8][9] for representative reviews and monographs. However, none of them has yet systematically discussed the unsteady aerothermodynamics according to the authors' knowledge.…”

Section: Introductionmentioning

confidence: 99%

A theoretical study on the unsteady aerothermodynamics for attached flow models

Chen

Bao

Tong

2010

Sci. China Phys. Mech. Astron.

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The principle of the unsteady aerothermodynamics was theoretically investigated for the attached flow. Firstly, two simplified models with analytic solutions to the N-S equations were selected for the research, namely the compressible unsteady flows on the infinite flat plate with both time-varying wall velocity and time-varying wall temperature boundary conditions. The unsteady temperature field and the unsteady wall heat flux (heat flow) were analytically solved for the second model. Then, the interaction characteristic of the unsteady temperature field and the unsteady velocity field in the simplified models and the effects of the interaction on the transient wall heat transfer were studied by these two analytic solutions. The unsteady heat flux, which is governed by the energy equation, is directly related to the unsteady compression work and viscous dissipation which originates from the velocity field governed by the momentum equation. The main parameters and their roles in how the unsteady velocity field affects the unsteady heat flux were discussed for the simplified models. Lastly, the similarity criteria of the unsteady aerothermodynamics were derived based on the compressible boundary layer equations. Along with the Strouhal number St u , the unsteadiness criterion of the velocity field, St T number, the unsteadiness criterion of the temperature field was proposed for the first time. Different from the traditional method used in unsteady aerodynamics which measures the flow unsteadiness only by the St u number, present results show that the flow unsteadiness in unsteady aerothermodynamics should be comprehensively estimated by comparing the relative magnitudes of the temperature field unsteadiness criterion St T number with the coefficients of other terms in the dimensionless energy equation. unsteady aerothermodynamics, transient heat transfer, similarity criterion PACS: 47.40.Ki, 44.20.+b, 44.05.+e

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“…Many experimental and numerical studies [1,2,3,4,5,6,7,8,9,10,11,12] have been dedicated to the aerothermodynamic of vehicles reentering the Earth atmosphere. Nevertheless, for the particular case of SARA capsule, only a few studies are available in the current literature [13,14,15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

Aerothermodynamic Analysis of a Reentry Brazilian Satellite

Santos

2012

Braz J Phys

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This work deals with a computational investigation on the small ballistic reentry Brazilian vehicle SARA (acronyms for SAt\'elite de Reentrada Atmosf\'erica). Hypersonic flows over the vehicle SARA at zero-degree angle of attack in a chemical equilibrium and thermal non-equilibrium are modeled by the Direct Simulation Monte Carlo (DSMC) method, which has become the main technique for studying complex multidimensional rarefied flows, and that properly accounts for the non-equilibrium aspects of the flows. The emphasis of this paper is to examine the behavior of the primary properties during the high altitude portion of SARA reentry. In this way, velocity, density, pressure and temperature field are investigated for altitudes of 100, 95, 90, 85 and 80 km. In addition, comparisons based on geometry are made between axisymmetric and planar two-dimensional configurations. Some significant differences between these configurations were noted on the flowfield structure in the reentry trajectory. The analysis showed that the flow disturbances have different influence on velocity, density, pressure and temperature along the stagnation streamline ahead of the capsule nose. It was found that the stagnation region is a thermally stressed zone. It was also found that the stagnation region is a zone of strong compression, high wall pressure. Wall pressure distributions are compared with those of available experimental data and good agreement is found along the spherical nose for the altitude range investigated.Comment: The paper will be published in Vol. 42 of the Brazilian Journal of Physic

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Aerothermodynamics for reusable launch systems

Cited by 14 publications

References 10 publications

Critical Hypersonic Aerothermodynamic Phenomena

Critical Hypersonic Aerothermodynamic Phenomena

A theoretical study on the unsteady aerothermodynamics for attached flow models

Aerothermodynamic Analysis of a Reentry Brazilian Satellite

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