Results 31 to 40 of about 74,293 (256)
An overview on development of external-combustion wave rotor pressure exchange technology
Hangkong gongcheng jinzhan, 2023 The external-combustion wave rotor utilizes the unsteady pressure wave formed by the opening and clos-ing of the ports to perform high-efficiency energy conversion, which has a wide range of application prospects.
LI Fengchao +3 more
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Unsteady turbulence cascades [PDF]
Physical Review E, 2016 We have run a total of 311 direct numerical simulations (DNSs) of decaying three-dimensional Navier-Stokes turbulence in a periodic box with values of the Taylor length-based Reynolds number up to about 300 and an energy spectrum with a wide wave-number range of close to -5/3 power-law dependence at the higher Reynolds numbers.
Susumu Goto, J. C. Vassilicos
openaire +3 more sources
Aerodynamic Sensitivity Analysis for a Wind Turbine Airfoil in an Air-Particle Two-Phase Flow
Applied Sciences, 2019 In this paper, the Navier-Stokes equations coupled with a Lagrangian discrete phase model are described to simulate the air-particle flows over the S809 airfoil of the Phase VI blade, the NH6MW25 airfoil of a 6 MW wind turbine blade and the NACA0012 ...
Tongqing Guo +4 more
doaj +1 more source
Frontiers in Energy Research, 2022 A vertical axial flow pump device has the characteristics of low head and large flow and has various forms, simple structure, and flexible installation. It is widely used in low-head pumping stations in plain areas.
Fan Yang +6 more
doaj +1 more source
An alternative architecture of the Humphrey cycle and the effect of fuel type on its efficiency
Energy Science & Engineering, 2020 Conventional gas turbines are a very mature technology, and performance improvements are becoming increasingly difficult and costly to achieve. Pressure‐gain combustion (PGC) has emerged as a promising technology in this respect, due to the higher ...
Panagiotis Stathopoulos
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Flow-Heat Conjugate Numerical Simulation Based on the Time-Domain Method
Xibei Gongye Daxue Xuebao, 2020 For the popups of the applicability of the time-domain based unsteady flow-heat coupling numerical simulation method in physical problems with time-period characteristic, the cases of the plate convection heat transfer and the hollow blunt-nosed blade ...
doaj +1 more source
Application of Steady and Unsteady Detonation Waves to Propulsion [PDF]
, 2004 The present work investigates the applications of steady and unsteady detonation waves to air-breathing propulsion systems. The efficiency of ideal detonation-based propulsion systems is first investigated based on thermodynamics.
Wintenberger, Eric
core +1 more source
Grid resolution assessment method for hybrid RANS-LES in turbomachinery
Engineering Applications of Computational Fluid Mechanics, 2022 Hybrid RANS-LES is a promising method for analyzing the complex flow structure in turbomachinery due to its excellent compromise between accuracy and computational cost.
Ruiyu Li +4 more
doaj +1 more source
Advanced Materials Interfaces, EarlyView.This study investigates friction and wear of AISI 52100 steel under dry sliding in CO2, air, and N2 atmospheres, with and without contact electrification. CO2 forms a stable carbon‐rich tribofilm that reduces friction by ∼30% and wear by ∼85%. High‐resolution TEM, EELS, and molecular dynamics reveal pressure‐dependent lubrication mechanisms, showing ...
Julio A. Cao‐Romero‐Gallegos +6 more
wiley +1 more source
The onset of instability in unsteady boundary-layer separation
, 1996 The process of unsteady two-dimensional boundary-layer separation at high Reynolds number is considered. Solutions of the unsteady non-interactive boundary-layer equations are known to develop a generic separation singularity in regions where the ...
K. W. Cassel +5 more
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