Author: K. Koenig
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
Book Description
This study considers an arrangement of a plane-nosed circular cylinder with a smaller diameter plane-nosed cylindrical probe coaxially extending ahead in a transonic axial flow. This configuration is a prototype for a low drag forebody replacing more conventional streamlined nose fairings. Apparently only one previous study is available in open literature which clearly shows reductions in transonic forebody drag for such arrangements. In view of the lack of data on transonic flow past probe/cylinder configurations, an attempt is made to construct the flow field based on data for related and component flows. The flow is modelled as the merging of several component, separated flows. Component flows are axisymmetric plane-nosed cylinders and axisymmetric forward-facing steps. Related flows include rearward-facing steps, cavities and bases. Relatively little data are available in the open literature concerning transonic flow past any of these arrangements, especially for axisymmetric geometries. The data which is available is discussed for insights which might be gained regarding probe/cylinder flows; emphasis is given to a plane-nosed cylinder flows and the opening phenomenon associated with cavity flows. A simple, semi-empirical free streamline model is developed for the postulated flow field of a low-drag probe/cylinder configuration. Partial agreement with inferences from related experimental data is obtained.
Transonic Merging Separated Flows
Author: K. Koenig
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
Book Description
This study considers an arrangement of a plane-nosed circular cylinder with a smaller diameter plane-nosed cylindrical probe coaxially extending ahead in a transonic axial flow. This configuration is a prototype for a low drag forebody replacing more conventional streamlined nose fairings. Apparently only one previous study is available in open literature which clearly shows reductions in transonic forebody drag for such arrangements. In view of the lack of data on transonic flow past probe/cylinder configurations, an attempt is made to construct the flow field based on data for related and component flows. The flow is modelled as the merging of several component, separated flows. Component flows are axisymmetric plane-nosed cylinders and axisymmetric forward-facing steps. Related flows include rearward-facing steps, cavities and bases. Relatively little data are available in the open literature concerning transonic flow past any of these arrangements, especially for axisymmetric geometries. The data which is available is discussed for insights which might be gained regarding probe/cylinder flows; emphasis is given to a plane-nosed cylinder flows and the opening phenomenon associated with cavity flows. A simple, semi-empirical free streamline model is developed for the postulated flow field of a low-drag probe/cylinder configuration. Partial agreement with inferences from related experimental data is obtained.
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
Book Description
This study considers an arrangement of a plane-nosed circular cylinder with a smaller diameter plane-nosed cylindrical probe coaxially extending ahead in a transonic axial flow. This configuration is a prototype for a low drag forebody replacing more conventional streamlined nose fairings. Apparently only one previous study is available in open literature which clearly shows reductions in transonic forebody drag for such arrangements. In view of the lack of data on transonic flow past probe/cylinder configurations, an attempt is made to construct the flow field based on data for related and component flows. The flow is modelled as the merging of several component, separated flows. Component flows are axisymmetric plane-nosed cylinders and axisymmetric forward-facing steps. Related flows include rearward-facing steps, cavities and bases. Relatively little data are available in the open literature concerning transonic flow past any of these arrangements, especially for axisymmetric geometries. The data which is available is discussed for insights which might be gained regarding probe/cylinder flows; emphasis is given to a plane-nosed cylinder flows and the opening phenomenon associated with cavity flows. A simple, semi-empirical free streamline model is developed for the postulated flow field of a low-drag probe/cylinder configuration. Partial agreement with inferences from related experimental data is obtained.
Experimental Study of the Flow Field Downstream of a Single Tube Row
Author: Minter Cheng
Publisher:
ISBN:
Category : Gas dynamics
Languages : en
Pages : 106
Book Description
Publisher:
ISBN:
Category : Gas dynamics
Languages : en
Pages : 106
Book Description
Hypersonic Flow Theory
Author: Wallace Hayes
Publisher: Elsevier
ISBN: 032314876X
Category : Technology & Engineering
Languages : en
Pages : 481
Book Description
Hypersonic Flow Theory presents the fundamentals of fluid mechanics, focusing on the hypersonic flow theory and approaches in theoretical aerodynamics. This book discusses the assumptions underlying hypersonic flow theory, unified supersonic-hypersonic similitude, two-dimensional and axisymmetric bodies, and circular cylinder. The constant-streamtube-area approximation, streamtube-continuity methods, and tangent-wedge and tangent-cone are also deliberated. This text likewise covers the similar laminar boundary layer solutions, bluntness induced interactions on slender bodies, and free molecule transfer theory. The dynamics of hypersonic flight or hypersonic wing theory, magnetohydrodynamic theory, or any developments involving treatment of the Boltzmann equation are not included. This publication is intended for hypersonic aerodynamicists, students, and researchers conducting work on the hypersonic flow phenomena.
Publisher: Elsevier
ISBN: 032314876X
Category : Technology & Engineering
Languages : en
Pages : 481
Book Description
Hypersonic Flow Theory presents the fundamentals of fluid mechanics, focusing on the hypersonic flow theory and approaches in theoretical aerodynamics. This book discusses the assumptions underlying hypersonic flow theory, unified supersonic-hypersonic similitude, two-dimensional and axisymmetric bodies, and circular cylinder. The constant-streamtube-area approximation, streamtube-continuity methods, and tangent-wedge and tangent-cone are also deliberated. This text likewise covers the similar laminar boundary layer solutions, bluntness induced interactions on slender bodies, and free molecule transfer theory. The dynamics of hypersonic flight or hypersonic wing theory, magnetohydrodynamic theory, or any developments involving treatment of the Boltzmann equation are not included. This publication is intended for hypersonic aerodynamicists, students, and researchers conducting work on the hypersonic flow phenomena.
Welding in Space and the Construction of Space Vehicles by Welding
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
NASA SP.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 220
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 220
Book Description
Scale Effects on Aircraft and Weapon Aerodynamics
Author: A. B. Haines
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 276
Book Description
Publisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 276
Book Description
Manual of Soil Laboratory Testing, Soil Classification and Compaction Testing
Author: K. H. Head
Publisher: John Wiley & Sons
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 360
Book Description
Publisher: John Wiley & Sons
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 360
Book Description
Computational Methods in Viscous Aerodynamics
Author: T. K. S. Murthy
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 392
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 392
Book Description
Aerodynamics and aeroacoustics of rotorcraft
Author:
Publisher:
ISBN: 9789283600152
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN: 9789283600152
Category :
Languages : en
Pages : 0
Book Description
Aircraft Excrescence Drag
Author: Alec David Young
Publisher:
ISBN: 9789283513926
Category : Boundary layer
Languages : en
Pages : 159
Book Description
Publisher:
ISBN: 9789283513926
Category : Boundary layer
Languages : en
Pages : 159
Book Description