Nonequilibrium effects in near-wake ionizing flows
Nonequilibrium effects in near-wake ionizing flows
- New search for: Grasso, F.
- New search for: Pirozzoli, S.
- New search for: Grasso, F.
- New search for: Pirozzoli, S.
The objective of the present work is to assess the influence of thermochemical nonequilibrium or near-wake flows, whose characterization and understanding are crucial for the design of reentry vehicles. An analysis of thermal and chemical nonequilibrium effects in near-wake ionizing flows is presented. The influence of real-gas effects on the establishment of scaling laws of the near-wake properties is analyzed, and a simplified model, which relies on an idealized flow solver still capable of accounting for dissociation and ionization effects, is developed. A study of the flows around sphere-cone and Apollo-like re-entry capsule bodies shows that the forebody nonequilibrium does affect the quantities that characterize the near-wake behavior (e.g., upstream influence, extent of recirculation, peak heating along the base). In addition, we show that real-gas effects can be recovered by means of an idealized-gas model that solves for the compressible Navier-Stokes equations and a transport equation for the specific-heat ratio gamma, supplemented with algebraic relations to determine the species mass fractions and vibrational temperature as a function of gamma.
Document information
Nonequilibrium effects in near-wake ionizing flows
Nichtgleichgewichtseffekte in der ionisierenden Nachlaufströmung von Raumfahrzeugen beim Eintauchen in die Erdathmosphäre
AIAA Journal ; 35 , 7 ; 1151-1163
1997
13 Seiten, 13 Bilder, 2 Tabellen, 21 Quellen
Article (Journal)
English
Raumfahrzeug , Erdatmosphäre , Ionisation , chemische Reaktion , Thermodynamik , reales Gas , mathematisches Modell , mathematische Lösung , numerisches Verfahren , Damköhler-Zahl , Gasgemisch , Druckverteilung , Wirbelstärke , Abreißen der Strömung , Navier-Stokes-Gleichung , kompressible Strömung , Transporttheorie , Nachlaufströmung
Similar titles
Nonequilibrium Effects in Near-Wake Ionizing Flows
| Online Contents | 1997
Nonequilibrium Effects in Near-Wake Ionizing Flows
| AIAA | 1997
Modeling of Ionizing Hypersonic Flows in Nonequilibrium
| Online Contents | 1995
Modeling of ionizing hypersonic flows in nonequilibrium
| AIAA | 1995