Author: Thorval TendelandPublisher:
ISBN:
Category : Skin friction (Aerodynamics)
Languages : en
Pages : 23
Book Description
The Effect of Fluid Injection on the Compressible Turbulent Boundary Layer - The Effect on Skin Friction of Air Injected Into the Boundary Layer of a Cone at M
Author: Thorval TendelandPublisher:
ISBN:
Category : Skin friction (Aerodynamics)
Languages : en
Pages : 23
Book Description
The Effect of Fluid Injection on the Compressible Turbulent Boundary Layer
Author: Morris W. RubesinPublisher:
ISBN:
Category : Air flow
Languages : en
Pages : 37
Book Description
Local values of heat-transfer rate and temperature-recovery factor, obtained on a transpiration-cooled flat plate, are presented. Air was injected into a turbulent boundary layer at several rates of flow through a porous flat plate oriented parallel to an air stream. Surface temperatures were maintained near recovery temperature. The Mach number was 2.7 and the Reynolds number range was 1,500,000 to 7,000,000. The results for nearly uniform injection show: (1) The ratio of local Stanton number with injection to that with zero injection decreases appreciably with increased injection rate and this decrease is greater at the higher Reynolds numbers. The decrease is comparable to the predicted theoretical values. (2) The local temperature-recovery factor decreases with increasing injection rate at a given Reynolds number and the rate of decrease is greater at the higher Reynolds numbers. These effects are not predicted by the theory. (3) The transpiration cooling process requires considerably less coolant than conventional heat exchangers to maintain a given cooled surface temperature, especially for high cooling loads.
The Calculation of Compressible Turbulent Boundary Layers with Fluid Injection
Author: L. C. SquirePublisher:
ISBN: 9780114708498
Category : Fluid dynamics
Languages : en
Pages : 34
Book Description
The Compressible Turbulent Boundary Layer with Surface Mass Transfer
Author: Fred CulickPublisher:
ISBN:
Category : Boundary layer
Languages : en
Pages : 80
Book Description
NASA Technical Note
Author: On the Turbulent Boundary Layer with Fluid Injection
Author: Donald Lawson TurcottePublisher:
ISBN:
Category :
Languages : en
Pages : 12
Book Description
WADC Technical Report
Author: United States. Wright Air Development DivisionPublisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1276
Book Description
NASA Technical Memorandum
Author: Compressible turbulent Boundary Layers with combined air injection and pressure gradient
Author: G. D. ThomasPublisher:
ISBN: 9780114709242
Category : Boundary layer
Languages : en
Pages : 75
Book Description
The Turbulent Boundary Layer in a Compressible Fluid
Author: Donald E. ColesPublisher:
ISBN:
Category : Aerodynamics
Languages : en
Pages : 580
Book Description
The first object of the paper is to develop a transformation which reduces the boundary-layer equations for compressible two-dimensional mean turbulent motion to incompressible form. The second object is to apply this transformation to the special case of the adiabatic turbulent boundary layer on a smooth wall. The transformation represents at every stage a genuine kinematic and dynamic correspondence between two real flows, both of which are capable of being observed experimentally. Since the mean pressure and mean velocity can then be measured in either flow, the mean acceleration of the fluid can in principle be determined, and the shearing stress can be adequately and accurately defined as the stress which is necessary to account for this acceleration. This formulation leads to a general transformation valid for laminar or turbulent flow in wakes and boundary layers, without regard to the state or energy equations or the viscosity law for the compressible fluid, and without regard to the boundary conditions on surface pressure or temperature in the event that a surface is involved. (Author).