Author: Gregory R. Jones
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Book Description

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 420

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Book Description

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 728

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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 898

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Book Description

Author: Mark Ahlers
Publisher: SAE International
ISBN: 076808296X
Category : Science
Languages : en
Pages : 107

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Book Description
Aircraft thermal management (ATM) is increasingly important to the design and operation of commercial and military aircraft due to rising heat loads from expanded electronic functionality, electric systems architectures, and the greater temperature sensitivity of composite materials compared to metallic structures. It also impacts engine fuel consumption associated with removing waste heat from an aircraft. More recently the advent of more electric architectures on aircraft, such as the Boeing 787, has led to increased interest in the development of more efficient ATM architectures by the commercial airplane manufacturers. The ten papers contained in this book describe aircraft thermal management system architectures designed to minimize airplane performance impacts which could be applied to commercial or military aircraft. Additional information on Aircraft Thermal Management System Architectures is available from SAE AIR 5744 issued by the AC-9 Aircraft Environmental System Committee and the SAE book Aircraft Thermal Management Integrated Analysis (PT-178). SAE AIR 5744 defines the discipline of aircraft thermal management system engineering while Aircraft Thermal Management Integrated Analysis discusses approaches to computer simulation of the simultaneous operation of all systems affecting thermal management on an aircraft.

Author: Robert T. Swann
Publisher:
ISBN:
Category : Aerodynamic heating
Languages : en
Pages : 50

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Book Description
Differential equations governing the transient response of thermal protection systems to a hyperthermal environment are presented. These equations are expanded into finite-difference equations which are suitable for numerical solution. The equations provide for three layers of different materials, the first two of which may have moving boundaries. Concentrated heat sinks, such as metallic structures, may be located at the back surfaces of the second or third layers or of both layers. The analysis was developed primarily for charring ablators but is also applicable to impregnated ceramic, subliming, and heat-sink thermal protection systems. The principal difficulty encountered in numerical analysis of charring ablators is the extensive computer time required to obtain solutions. Provision is made in the numerical equations to introduce options which reduce computer time. The errors resulting from these options under various conditions are discussed. Good agreement is obtained between numerical results and exact solutions.

Author: Thomas N. Bernstein
Publisher:
ISBN:
Category : Aerodynamic heating
Languages : en
Pages : 68

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Book Description
The thermal analysis is presented of a portion of the external surface thermal protection system and load bearing structure of a hypersonic vehicle, whose mission consists of a climb-out to 100,000 feet, cruise at Mach 6, descent, and a final phase, termed turn around, which includes landing rollout, refueling and maintenance. Temperature-dependent thermo-physical properties are utilized and compared to results obtained for constant thermo-physical properties.

Author: Mark F. Ahlers
Publisher:
ISBN: 9781523106318
Category : Aerodynamic heating
Languages : en
Pages : 99

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Book Description

Author: William D. Deveikis
Publisher:
ISBN:
Category : Aerothermodynamics
Languages : en
Pages : 104

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Book Description

Author: A.S. Yakimov
Publisher: Springer
ISBN: 3319782177
Category : Technology & Engineering
Languages : en
Pages : 125

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Book Description
This book is devoted to studies of unsteady heat and mass exchange processes taking into account thermochemical destruction of thermal protective materials, research of transpiration cooling systems, thermal protection of composite materials exposed to low-energy disturbances, as well as the numerical solution of heat and mass transfer of the exchange. It proposes several mathematical models of passive and active thermal protection systems with regard to factors such as surface ablation, surface roughness, phase transition of a liquid in porous materials, rotation of the body around its longitudinal axis, and exposure to low-energy disturbances. The author studies the possibilities to control thermochemical destruction and heat mass exchange processes in transpiration cooling systems exposed to low-energy disturbances. The numerical analysis of the heat and mass exchange process in carbon plastics under repeated impulse action is also presented. The numerical solutions of problems are compared with the known experimental data. The book is intended for specialists in the field of thermal protection and heat mass exchange, as well as graduate and undergraduates in physics and mathematics.