METHOD FOR SKIN FRICTION DRAG REDUCTION accurate calculation of boundary layer integral quantities. As the traverse system had to be permanently fixed to the surface of the model, the hot wire traverse was limited to a single location along the centreline of the model and downstream of the final row of the cavities. CiteSeerX — Nomenclature Combustion occurred at all flow conditions with results indicating a maximum reduction in skin friction coefficient, of approximately 77 % of the level measured with no injection. Skin friction reductions of approximately 60 % were obtained at two other test flows. Multiple slot skin friction reduction - CORE
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Aircraft drag reduction—a review - D M Bushnell, 2003 - SAGE Journals Cousteix, J., Arnal, D., Coustols, E. Reduction of aerodynamic skin friction drag. ..... Bandyopadhyay, P. R. Turbulent boundary layers subjected to multiple curvatures ... through flush transverse slots on turbulent boundary layer skin friction. Aircraft drag reduction—a review - SAGE Journals turbulent skin friction reduction associated with mass injection was also known, ..... skin friction reduction via slot injection of LFC suction mass flow, operation of .... disturbance fields and multiple (usually 3-D) wave systems. Research has ... Non-similar solutions for unsteady flow over a yawed cylinder with non ...
Skin Friction Reduction by Injection Through Combinations ...
Hypervelocity Skin-Friction Reduction by Boundary-Layer Combustion ... (2018) Analysis and reduction of skin-friction in a rocket-based combined-cycle engine flow path operating from ... Slot Injection of Hydrogen into a Supersonic Air Flow. ... Hypersonic Viscous Drag Reduction Via Multi-Porthole Injector Arrays . Submarines - Polymer Drag Reduction - GlobalSecurity.org Nov 7, 2011 ... ... which have shown 70-80% reduction in skin-friction drag coefficient in the ... Ionic and non-ionic surfactants can also offer similar drag reduction as .... amount or more additive being ejected from multiple slots along the ... Aircraft drag reduction—a review - D M Bushnell, 2003 - SAGE Journals
Combustion occurred at all flow conditions with results indicating a maximum reduction in skin friction coefficient, of approximately 77 % of the level measured with no injection. Skin friction reductions of approximately 60 % were obtained at two other test flows.
In general, the magnitude of the skin friction reduction increases as the volume of bubbles in the boundary layer is increased until a maximum skin friction reduction of typically 80–90% of the undisturbed skin friction level is reached. Skin friction reduction by slot injection at mach 0.8 in ... Skin friction reduction by slot injection at mach 0.8 Responsibility Victor Zakkay and Chi R. Wang ; prepared by New York University, Westbury, N.Y., for Langley Research Center. Skin friction reduction by slot injection at mach 0.8 (Book ... Skin friction reduction by slot injection at mach 0.8. Washington : U.S. National Aeronautics and Space Administration ; Springfield, Va. : For sale by the National ...
A History of suction-Type Laminar-Flow control
In general, the magnitude of the skin friction reduction increases as the volume of bubbles in the boundary layer is increased until a maximum skin friction reduction of typically 80–90% of the undisturbed skin friction level is reached. Skin friction reduction by slot injection at mach 0.8 in ... Skin friction reduction by slot injection at mach 0.8 Responsibility Victor Zakkay and Chi R. Wang ; prepared by New York University, Westbury, N.Y., for Langley Research Center. Skin friction reduction by slot injection at mach 0.8 (Book ... Skin friction reduction by slot injection at mach 0.8. Washington : U.S. National Aeronautics and Space Administration ; Springfield, Va. : For sale by the National ...
Laminar Flow Control of a Flat Plate Boundary Layer Using Dielectric ... Aug 31, 2012 ... this shear-induced skin friction drag can account for almost 50% of the total .... slot, and hence in a less complex fashion than conventional suction systems. ...... Hence, minimising drag to reduce environmental impact and operating ...... of multiple actuators for this purpose is discussed in the next chapter.