Second-order Wave Structure in Supersonic Flows PDF Download

Author: David A. Caughey
Publisher:
ISBN:
Category : Air flow
Languages : en
Pages : 98

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Book Description
This report investigates the mathematical analysis of wave structure in supersonic flow.

Author: David A. Caughey
Publisher:
ISBN:
Category : Aerodynamics, Supersonic
Languages : en
Pages : 100

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Book Description
This report investigates the mathematical analysis of wave structure in supersonic flow.

Author: James Wallace
Publisher:
ISBN:
Category :
Languages : en
Pages : 60

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Book Description
Second-order supersonic flow over a cruciform configuration is sudied for supersonic inlets, wing-body junctions and vehicle fins. Severe local failures are identified and adjusted for the ordinary second-order theory. For wings with discontinuous slopes, discontinuous potentials occur across the planar shock and squareroot singularities in the velocities occur at the intersection of these shocks with the ruciform surfaces. second-order solution uniformly valid to first order is constructed by adjustment of the ordinary second-order solution obtained first. The uniformly valid solution has two different series representations in the thickness parameter. This solution gives the detailed wave structure and shows a flow regime upstream of the vertex-centered undisturbed Mach cone not predicted by the ordinary theory. The wave structure consists of a pyramidal arrangement of planar shocks adjacent to and upstream of the above cone, followed by weaker oblique expansion fans and finally by two extremely weak shocks coincident with the vertex-centered undisturbed Mach cone. Results are given for the case of two iAD-287 426Div. 9 U (TITA/SEB) Bell Aerosystems Co., Buffalo, N.Y. THERMOELASTIC EFFECTS ON HYPERSONIC STABILITY AND CONTROL. PART II. VOLUME I. ELASTIC RESPONSE DETERINATIONS FOR SEVERELY HEATED WINGS. Final rept., by Richard H. Gllagher and Rolland D. Huff. Aug 62, 160p. incl. illus. tersecting wedges. (uthor).

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 880

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Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Author: Joseph T. C. Liu
Publisher: Cambridge University Press
ISBN: 1108997791
Category : Technology & Engineering
Languages : en
Pages : 78

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Book Description
In this Element, the gas-particle flow problem is formulated with momentum and thermal slip that introduces two relaxation times. Starting from acoustical propagation in a medium in equilibrium, the relaxation-wave equation in airfoil coordinates is derived though a Galilean transformation for uniform flow. Steady planar small perturbation supersonic flow is studied in detail according to Whitham's higher-order waves. The signals owing to wall boundary conditions are damped along the frozen-Mach wave, and are both damped and diffusive along an effective-intermediate Mach wave and diffusive along the equilibrium Mach wave where the bulk of the disturbance propagates. The surface pressure coefficient is obtained exactly for small-disturbance theory, but it is considerably simplified for the small particle-to-gas mass loading approximation, equivalent to a simple-wave approximation. Other relaxation-wave problems are discussed. Martian dust-storm properties in terms of gas-particle flow parameters are estimated.

Author: David A. Caughey
Publisher: World Scientific
ISBN: 9812703187
Category : Mathematics
Languages : en
Pages : 466

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Book Description
The series of volumes to which this book belongs honors contributors who have made a major impact in computational fluid dynamics. This fourth volume in the series is dedicated to David Caughey on the occasion of his 60th birthday. The first volume was published in 1994 and was dedicated to Prof Antony Jameson. The second, dedicated to Earl Murman, was published in 1998. The third volume was dedicated to Robert MacCormack in 2002. Written by leading researchers from academia, government laboratories, and industry, the contributions in this volume present descriptions of the latest developments in techniques for numerical analysis of fluid flow problems, as well as applications to important problems in industry.

Author: Joseph Henry Clarke
Publisher:
ISBN:
Category :
Languages : en
Pages : 42

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A general reverse-flow relation is obtained within the framework of second-order (in surface deflection) supersonic flow theory. From this it is shown that the second-order increment in the drag of an arbitrary quasicylindrical body can be expressed as surface and volume integrals of the first-order solutions corresponding to forward and reverse flow past the body. Analogous results are obtained for second-order transverse forces and moments on an arbitrary quasiplanar wing, except the first-order reverse flow must correspond to certain zero-thickness wings. Other similar results are possible. Thus, second order aerodynamic forces on bodies may be obtained from first-order solutions by quadrature. It is also shown that the reverse-flow integral relation can yield the pressure distribution on the surface by inversion of an integral equation constructed therefrom. It is thought that these results should be particularly useful for the Mach number range between that of linearized theory and that of full hypersonic small-disturbance theory. (Author).

Author:
Publisher:
ISBN:
Category : Shock (Mechanics)
Languages : en
Pages : 640

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Author: Ira R. Schwartz
Publisher:
ISBN:
Category : Sonic boom
Languages : en
Pages : 472

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Book Description
Prediction methods for sonic boom generation and propagation with overpressure minimization in supersonic transport design and operation.

Author: Richard Courant
Publisher: Springer Science & Business Media
ISBN: 9780387902326
Category : Mathematics
Languages : en
Pages : 488

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Book Description
Courant and Friedrich's classical treatise was first published in 1948 and tThe basic research for it took place during World War II. However, many aspects make the book just as interesting as a text and a reference today. It treats the dynamics of compressible fluids in mathematical form, and attempts to present a systematic theory of nonlinear wave propagation, particularly in relation to gas dynamics. Written in the form of an advanced textbook, it should appeal to engineers, physicists and mathematicians alike.