Aerothermodynamic Consequences of Nozzle Nonequilibrium PDF Download
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Author: A. F. Burke
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 208
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Book Description
The effects of nozzle nonequilibrium in a high temperature, hypersonic test facility were evaluated. By using the results of a set of exact computer solutions for air nozzle expansions to interpolate frozen atomic mole fraction and the fraction of total enthalpy frozen in dissociation and vibration, a method was devised for direct determination of (1) freestream quantities downstream of the freezing region in a nonequilibrium nozzle expansion, (2) the nozzle boundary layer growth, and (3) the aerodynamic effects of freestream nonequilibrium. The freestream results are shown to compare favorably with exact computer solutions. Illustrative applications to hypersonic inlet testing and downstream expansion following an MHD accelerator are included. (Author).
Author: A. F. Burke
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 208
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Book Description
The effects of nozzle nonequilibrium in a high temperature, hypersonic test facility were evaluated. By using the results of a set of exact computer solutions for air nozzle expansions to interpolate frozen atomic mole fraction and the fraction of total enthalpy frozen in dissociation and vibration, a method was devised for direct determination of (1) freestream quantities downstream of the freezing region in a nonequilibrium nozzle expansion, (2) the nozzle boundary layer growth, and (3) the aerodynamic effects of freestream nonequilibrium. The freestream results are shown to compare favorably with exact computer solutions. Illustrative applications to hypersonic inlet testing and downstream expansion following an MHD accelerator are included. (Author).
Author: Ernst Heinrich Hirschel
Publisher: Springer
ISBN: 3319143735
Category : Technology & Engineering
Languages : en
Pages : 450
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Book Description
This successful book gives an introduction to the basics of aerothermodynamics, as applied in particular to winged re-entry vehicles and airbreathing hypersonic cruise and acceleration vehicles. The book gives a review of the issues of transport of momentum, energy and mass, real-gas effects as well as inviscid and viscous flow phenomena. In this second, revised edition the chapters with the classical topics of aerothermodynamics more or less were left untouched. The access to some single topics of practical interest was improved. Auxiliary chapters were put into an appendix. The recent successful flights of the X-43A and the X-51A indicate that the dawn of sustained airbreathing hypersonic flight now has arrived. This proves that the original approach of the book to put emphasis on viscous effects and the aerothermodynamics of radiation-cooled vehicle surfaces was timely. This second, revised edition even more accentuates these topics. A new, additional chapter treats examples of viscous thermal surface effects. Partly only very recently obtained experimental and numerical results show the complexity of such phenomena (dependence of boundary-layer stability, skin friction, boundary-layer thicknesses, and separation on the thermal state of the surface) and their importance for airbreathing hypersonic flight vehicles, but also for any other kind of hypersonic vehicle.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 760
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Author: R. J. Vidal
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 86
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Book Description
Author: Peter P. Wegener
Publisher:
ISBN:
Category : Air flow
Languages : en
Pages : 256
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Book Description
Author: Ernst Heinrich Hirschel
Publisher: Springer Science & Business Media
ISBN: 3540265198
Category : Technology & Engineering
Languages : en
Pages : 419
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Book Description
The last two decades have brought two important developments for aeroth- modynamics. One is that airbreathing hypersonic flight became the topic of technology programmes and extended system studies. The other is the emergence and maturing of the discrete numerical methods of aerodyn- ics/aerothermodynamics complementary to the ground-simulation facilities, with the parallel enormous growth of computer power. Airbreathing hypersonic flight vehicles are, in contrast to aeroassisted re-entry vehicles, drag sensitive. They have, further, highly integrated lift and propulsion systems. This means that viscous eflFects, like boundary-layer development, laminar-turbulent transition, to a certain degree also strong interaction phenomena, are much more important for such vehicles than for re-entry vehicles. This holds also for the thermal state of the surface and thermal surface effects, concerning viscous and thermo-chemical phenomena (more important for re-entry vehicles) at and near the wall. The discrete numerical methods of aerodynamics/aerothermodynamics permit now - what was twenty years ago not imaginable - the simulation of high speed flows past real flight vehicle configurations with thermo-chemical and viscous effects, the description of the latter being still handicapped by in sufficient flow-physics models. The benefits of numerical simulation for flight vehicle design are enormous: much improved aerodynamic shape definition and optimization, provision of accurate and reliable aerodynamic data, and highly accurate determination of thermal and mechanical loads. Truly mul- disciplinary design and optimization methods regarding the layout of thermal protection systems, all kinds of aero-servoelasticity problems of the airframe, et cetera, begin now to emerge.
Author:
Publisher:
ISBN:
Category : Military research
Languages : en
Pages : 572
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Book Description
Author: Peter A. Gnoffo
Publisher:
ISBN:
Category : Aerodynamics, Hypersonic
Languages : en
Pages : 68
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Book Description
Author: F.R. Riddell
Publisher: Elsevier
ISBN: 0323142621
Category : Transportation
Languages : en
Pages : 769
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Book Description
Progress in Astronautics and Rocketry, Volume 7: Hypersonic Flow Research compiles papers presented at a conference on hypersonics held at the Massachusetts Institute of Technology in August 1961. This book discusses the low Reynolds number effects, chemical kinetics effects, inviscid flow calculations, and experimental techniques relating to the problems in acquiring an understanding of hypersonic flow. The structure and composition of hypersonic wakes with attendant complex chemical kinetic effects is only briefly mentioned. This text consists of five parts. Parts A to C comprise of theoretical papers on the problems of calculating flow fields at hypersonic speeds. The experimental techniques that are of immediate practical interest in view of the difficulty of flight testing are discussed in Parts D and E. This publication is beneficial to engineers involved in advanced design problems.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
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Book Description
