Results 81 to 90 of about 4,532,136 (402)

Unsteady transonic flows in an axial flow compressor [PDF]

open access: yesQuarterly of Applied Mathematics, 1985
We deal with some transonic flow problems for the supersonic axial flow compressor: these arise in connection with flutter analysis for fan blading. We treat the subject from the point of view of boundary value problems for the reduced wave equations of supersonic and subsonic flow, with particular reference to (a) the rotor in a finite duct and (b) a ...
openaire   +1 more source

Extension of transonic flow computational concepts in the analysis of cavitated bearings [PDF]

open access: yes
An analogy between the mathematical modeling of transonic potential flow and the flow in a cavitating bearing is described. Based on the similarities, characteristics of the cavitated region and jump conditions across the film reformation and rupture ...
Brewe, D. E.   +2 more
core   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

open access: yesAdvanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner   +9 more
wiley   +1 more source

The application of Riegels' rule and time-like damping to transonic flow calculations [PDF]

open access: yes
Finite difference relaxation solutions of the nonlinear small perturbation equations have proven reliable and successful in determining the transonic flowfields about thin airfoils.
Herron, D. L.
core   +1 more source

Cu‐Based MOF/TiO2 Composite Nanomaterials for Photocatalytic Hydrogen Generation and the Role of Copper

open access: yesAdvanced Functional Materials, EarlyView.
HKUST‐1/TiO2 composite materials show a very high photocatalytic hydrogen evolution rate which increases as a function of the irradiation time until reaching a plateau and even surpasses the performance of the 1%Pt/TiO2 material after three photocatalytic cycles.
Alisha Khan   +9 more
wiley   +1 more source

Causes and Solution of Aperiodicity of Supersonic Flow Field Downstream of a Profile Cascade

open access: yesCommunications, 2012
The paper deals with problems of transonic flow field periodicity downstream of a profile cascade with finite number of blades. The origin of phenomena generating this aperiodicity in transonic wind tunnel is described.
Martin Luxa   +3 more
doaj   +1 more source

Finite element analysis of transonic flows in cascades: Importance of computational grids in improving accuracy and convergence [PDF]

open access: yes
The finite element method is applied for the solution of transonic potential flows through a cascade of airfoils. Convergence characteristics of the solution scheme are discussed.
Akay, H. U., Ecer, A.
core   +1 more source

Mixed‐Dimensional 0D‐DNA‐2D Heterostructures Beyond van der Waals: A DNA‐Templated Strategy for Optoelectronic Tunability

open access: yesAdvanced Functional Materials, EarlyView.
A two‐step DNA metallization process is presented for the modular assembly of metal sulfide nanoparticles (NPs) on MoS2, with nanoscale control over their separation and ability to concomitantly assemble different kind of NPs. This allowed to tailor the photoinduced electrical response of phototransistors to different wavelengths, according to the ...
Kai Chen   +3 more
wiley   +1 more source

Locally Linearized Solution of Lifting Transonic Flow by Method of Parametric Differentiation

open access: yesJournal of Mathematical and Fundamental Sciences, 2019
The governing equation of transonic small disturbance flow present a non-linear partial differential equation which is difficult to solve. The method of parametric differentiation reduces the non-linear partial differential equation of transonic flow ...
Harijono Djojodihardjo
doaj  

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