Numerical Calculations of Two-dimensional, Unsteady Transonic Flows with Circulation PDF Download
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Author: Richard M. Beam
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 34
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Book Description
Author: Richard M. Beam
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 34
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Book Description
Author: Thomas C Adamson (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 39
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Book Description
A two dimensional unsteady transonic irrotational inviscid flow of a perfect gas with constant specific heats is considered. The analysis involves perturbations from a uniform sonic isentropic flow. The governing perturbation potential equations are derived for various orders of the ratio of the characteristic time associated with a temporal flow disturbance to the time taken by a sonic disturbance to traverse the transonic regime. The case where this ratio is large compared to one is studied in detail. A similarity solution involving an arbitrary function of time is found and it is shown that this solution corresponds to unsteady channel flows with either stationary or time varying wall shapes. Numerical computations are presented showing the temporal changes in flow structure as a disturbance dies out exponentially for the following typical nozzle flows: simple accelerating (Meyer) flow and flow with supersonic pockets (Taylor and limiting Taylor flow). (Author).
Author: Murali Damodaran
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 582
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Author: T. C Adamson (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
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Book Description
Unsteady transonic flow in two-dimensional duct with a shock wave is considered. The flow entering the duct is uniform and steady; unsteadiness is caused by any mixture of impressed oscillations in wall shape and back pressure. Asymptotic methods are employed to give solutions for flow properties and for position and velocity of the shock wave in several different problems, characterized by the relative orders of the nondimensional amplitude and frequency of the oscillations. Illustrative example flows are considered, with a numerical solutions used for complex wall shapes. (Author).
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 28
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Book Description
A formulation of the lambda scheme for the analysis of two dimensional inviscid, compressible, unsteady transonic flows is presented. The scheme uses generalized Riemann variables to determine the appropriate two point, one sided finite difference approximation for each derivative in the unsteady Euler equations. These finite differences are applied at the predictor and corrector levels with shock updating at each level. The weaker oblique shocks are captured, but strong near normal shocks are fitted into the flow using the Rankine-Hugoniot relations. This code is demonstrated with a numerical example of a duct flow problem with developing normal and oblique shock waves. The technique is implemented in a code which has been made efficient by streamlining to a minimal number of operations and by eliminating branch statements. The scheme is shown to provide an accurate analysis of the flow, including formation, motions, and interactions of shocks; the results obtained on a relatively coarse mesh are comparable to those obtained by other methods on much finer meshes.
Author: Mårten Landahl
Publisher:
ISBN:
Category : Aerodynamics, Transonic
Languages : en
Pages : 152
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 926
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 456
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Book Description
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: Earl H. Dowell
Publisher: Springer Nature
ISBN: 3030742369
Category : Technology & Engineering
Languages : en
Pages : 828
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Book Description
This book is the sixth edition. It is suitable for one or more courses at the advanced undergraduate level and graduate level to cover the field of aeroelasticity. It is also of value to the research scholar and engineering practitioner who wish to understand the state of the art in the field. This book covers the basics of aeroelasticity or the dynamics of fluid–structure interaction. While the field began in response to the rapid development of aviation, it has now expanded into many branches of engineering and scientific disciplines and treats physical phenomena from aerospace engineering, bioengineering, civil engineering, and mechanical engineering in addition to drawing the attention of mathematicians and physicists. The basic questions addressed are dynamic stability and response of fluid structural systems as revealed by both linear and nonlinear mathematical models and correlation with experiment. The use of scaled models and full-scale experiments and tests play a key role where theory is not considered sufficiently reliable.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 724
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Book Description
