Results 21 to 30 of about 4,532,136 (402)

Drag reduction on a transonic airfoil [PDF]

open access: yesJournal of Fluid Mechanics, 2022
Flow control for turbulent skin-friction drag reduction is applied to a transonic airfoil to improve its aerodynamic performance. The study is based on direct numerical simulations (with up to 1.8 billion cells) of the compressible turbulent flow around ...
M. Quadrio   +5 more
semanticscholar   +1 more source

Calculation of transonic flows around profiles with blunt and angled leading edges

open access: yesVietnam Journal of Mechanics, 2016
Transonic flow is a mixed flow of subsonic and supersonic regions. Because of this mixture, the solution of transonic flow problems is obtained only when solving the differential equations of motion with special treatments for the transition from ...
Hoang Thi Bich Ngoc, Nguyen Manh Hung
doaj   +1 more source

Airfoil seсtion in the near-sonic flow of gas

open access: yesАвіаційно-космічна техніка та технологія, 2021
The subject of investigation in this article is transonic flow. This is a condition in which local speeds of sound are appears on the wing surface, even at the subsonic speed of the nonturbulent flow. As a result, at a certain speed of the incoming flow,
Юрий Александрович Крашаница   +1 more
doaj   +1 more source

Comparison of the Flow Fields between Nozzles with Full-Open and Open-Close Valves at Transonic Velocity

open access: yesJournal of Applied Mathematics, 2022
At transonic velocity, ejector nozzles require third auxiliary intake valves to increase air intake, resulting in good thrust performance. However, different intake structures will inevitably lead to different internal flow-field structures and thrust ...
Zijie Li, Hao Wang
doaj   +1 more source

Phonon spectrum and correlations in a transonic flow of an atomic Bose gas [PDF]

open access: yes, 2016
Motivated by a recent experiment of J. Steinhauer, we reconsider the spectrum and the correlations of the phonons spontaneously emitted in stationary transonic flows.
F. Michel   +2 more
semanticscholar   +1 more source

Influences of the compressibility on aerodynamic characteristics of profile under the transonic flow theory

open access: yesVietnam Journal of Mechanics, 2007
Transonic flows are complex problems. At certain Mach numbers, in gas flows there are local transitions from the subsonic into the supersonic and reciprocally, especially the discontinuity throughout shock waves.
Hoang Thi Bich Ngoc
doaj   +1 more source

Assessment of condensation models for moist air transonic flow prediction [PDF]

open access: yesMATEC Web of Conferences, 2021
The aim of this article is to thoroughly analyse the influence of condensation models on the modelling of condensation phenomena in transonic flow of moist air.
Wiśniewski Piotr   +5 more
doaj   +1 more source

Segregation of a Keplerian disc and sub-Keplerian halo from a Transonic flow around a Black Hole by Viscosity and Cooling processes [PDF]

open access: yes, 2015
A black hole accretion is necessarily transonic. In presence of sufficiently high viscosity and cooling effects, a low-angular momentum transonic flow can become a standard Keplerian disc except close to the where hole where it must pass through the ...
K. Giri, S. Garain, S. Chakrabarti
semanticscholar   +1 more source

Influence of the Reynolds Number on Transonic Tip Flow

open access: yesInternational Journal of Aerospace Engineering, 2020
The tip flows in modern gas turbines are primarily transonic under realistic conditions and significantly impact the overall thrust performance and safety of the turbines.
Wuheng Feng   +3 more
doaj   +1 more source

Performance Improvement of a Highly Loaded Transonic Centrifugal Compressor with Tandem Impeller and Freeform Blade Configuration

open access: yesEnergies, 2022
A highly loaded transonic centrifugal compressor is aerodynamically designed and numerically investigated. The objectives are to improve the compressor efficiency by using tandem impeller configuration and 3D free-formed blade design concepts.
Ziliang Li, Yanhui Wu, Xingen Lu
doaj   +1 more source

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