Results 61 to 70 of about 20,987 (146)

Continuous Eddy Simulation vs. Resolution-Imposing Simulation Methods for Turbulent Flows

Fluids
The usual concept of simulation methods for turbulent flows is to impose a certain (partial) flow resolution. This concept becomes problematic away from limit regimes of no or an almost complete flow resolution: discrepancies between the imposed and ...
Adeyemi Fagbade, Stefan Heinz
doaj   +1 more source

Modelling and Simulation of Effusion Cooling—A Review of Recent Progress

Energies
Effusion cooling is often regarded as one of the critical techniques to protect solid surfaces from exposure to extremely hot environments, such as inside a combustion chamber where temperature can well exceed the metal melting point.
Hao Xia, Xiaosheng Chen, Christopher D. Ellis   +2 more
doaj   +1 more source

Model-Invariant Hybrid RANS-LES Computations on Unstructured Meshes [PDF]

Hybrid RANS-LES computations combine the bene ts of RANS and LES so that LES is used in regions where the accuracy of RANS deteriorates. The numerous hybrid approaches are limited by the speci cation of the LES-RANS interface, which can cause nonphysical
Sreekanth, R., Woodruff, Stephen L.
core   +1 more source

Numerical Analysis of Marine Propulsor Using Coupled BEMT/RANS Method

نشریه مهندسی دریا, 2017
Hydrodynamic analysis of the marine propulsors with complex geometry such as podded drive systems, ducted propellers, and waterjet systems are more complicated than conventional propeller systems.
Reza Shamsi, Hassan Ghassemi
doaj  

Shape Optimization of Aircraft Outflow Valve for Maximum Thrust Recovery

Aerospace
The present study demonstrates a step-by-step method for optimizing the outflow valve geometry and maximizing thrust generation. In this system, the skin-mounted OutFlow Valve (OFV) acts as a convergent–divergent nozzle and, as such, the De Laval nozzle ...
Tasos Karageorgiou, Pela Katsapoxaki, Michael Moeller, El Hassan Ridouane   +3 more
doaj   +1 more source

Aerodynamic Response of a Hovering Rotor to Ramp Changes in Pitch Input [PDF]

, 2008
Under transient conditions, a helicopter rotor generates a complex, time-dependent pattern of shed and trailed vorticity in its wake that has profound eects on its loading.
Brown, R.E., Duraisamy, K.
core   +1 more source

Large-Eddy Simulation of Axisymmetric Compression Corner Flow [PDF]

The Wall-Modeled Large Eddy Simulation (WMLES) approach is used to study the interaction of a shock wave with a high Reynolds number turbulent boundary layer. Since the near wall region is modeled, high Reynolds number turbulent flows can be simulated at
Iyer, Prahladh S., Malik, Mujeeb R.
core   +1 more source

Large-Eddy / Reynolds-Averaged Navier-Stokes Simulations of a Dual-Mode Scramjet Combustor [PDF]

, 2012
Numerical simulations of reacting and non-reacting flows within a scramjet combustor configuration experimentally mapped at the University of Virginia s Scramjet Combustion Facility (operating with Configuration A ) are described in this paper.
Cutler, Andrew, Danehy, Paul M., Edwards, Jack R., Fulton, Jesse A., Goyne, Christopher, Hassan, Hassan A., Johansen, Craig, Kouchi, Toshinori, McDaniel, James, Rockwell, Robert, Smith, Chad   +10 more
core   +1 more source

Large-Eddy Simulation of in-Cylinder Flows Simulation à grande échelle des écoulements internes dans les moteurs

Oil & Gas Science and Technology, 2006
Advances in physical models, numerical methods, and computational power together have brought large-eddy simulation (LES) to the point where it warrants serious consideration for computing in-cylinder turbulent flows.
Haworth D. C.
doaj   +1 more source

Optimization and Comparison of 3-D Model of Steam Ejector with Non-Equilibrium Condensation

Zhileng xuebao
Steam ejectors are vital components of ejector refrigeration systems and have attracted considerable attention owing to their energy savings and environmental protection.
Li Yiqiao, Zhou Dan, Fei Jiyou
doaj