Results 121 to 130 of about 126,405 (295)
Turbulence Kinetic Energy Budget Profiles Derived from Doppler Sodar Measurements [PDF]
, 1989 Gary K. Greenhut, G. Mastrantonio
openalex +1 more source
Energy Science &Engineering, EarlyView.This paper aims to improve a method to analyze the pressure, bearing capacity, and temperature of different oil cavity shapes with different conditions to enhance the lubrication reliability for wind turbines sliding bearings with discontinuous flow in mixed lubrication wear caused by strong sudden changes and heavy loads.
Wengui Mao +5 more
wiley +1 more source
Passive Solar Chimney Ventilation Efficiency in a Single Enclosed Space
Energy Science &Engineering, EarlyView.Coordinate system of passive solar chimney ventilation physical model. ABSTRACT This study numerically investigates passive solar chimney design with emphasis on the coupled influence of geometric and thermal parameters on air inlet flow. While prior studies have examined individual factors such as window height or chimney height, their combined ...
Jian‐Sheng Huang +4 more
wiley +1 more source
A multiple-time-scale turbulence model based on variable partitioning of turbulent kinetic energy spectrum [PDF]
A multiple-time-scale turbulence model of a single point closure and a simplified split-spectrum method is presented. In the model, the effect of the ratio of the production rate to the dissipation rate on eddy viscosity is modeled by use of the multiple-
Chen, C.-P., Kim, S.-W.
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Characterization of Multimodality in Wind Farm Layout Optimization
Energy Science &Engineering, EarlyView.ABSTRACT The phenomena of multiple optima in wind farm layout optimization (WFLO) problems is investigated. The choice of optimization algorithm and cost of solving WFLO problems is driven by the degree of local optimality in the design space; however little work has attempted to characterize this.
Daniel J. Poole
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Energy Science &Engineering, EarlyView.Based on entropy theory, this study presents a comparative numerical analysis of the flow energy dissipation (FED) in a VTSP under two distinct operating conditions: pump condition and turbine condition, both characterized by relatively high hydraulic efficiencies of 88.9% and 87.4%, respectively. In pump condition, the highest FED production occurs in
S. Liu +5 more
wiley +1 more source
An energy-constrained profile parameterization of shear-driven turbulence in the interior ocean
Frontiers in Marine ScienceThis paper proposes an energy-constrained profile parameterization of both turbulent kinetic energy dissipation rate (ϵ) and vertical diffusivity (κ), for shear instability-induced turbulence that is initiated in an initial unstable layer (IUL) where the
Lei Lu +8 more
doaj +1 more source
Downdraft Devices for Negative Emissions—Quantification Study and Environmental Implication
Greenhouse Gases: Science and Technology, EarlyView.ABSTRACT Methane (CH4) is a potent greenhouse gas with a global warming potential far exceeding that of CO2 over short time horizons. Its removal from the atmosphere remains challenging due to its low ambient concentration and chemical stability. This study explores downdraft energy towers (DETs) as an innovative CH4 mitigation technology that enhances
Xiaokun Yao +4 more
wiley +1 more source
Experimental analyses of trailing edge flows [PDF]
An experimental study of several of the trailing edge and wake turbulence properties for a NACA 64A010 airfoil section was completed. The experiment was conducted at the Ohio State University Aeronautical and Astronautical Research Laboratory in the 6 ...
Emmer, D. S., Petrie, S. L.
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Heat Transfer, EarlyView.ABSTRACT This study reviews recent advances in using nanofluids to enhance double‐pipe heat exchanger (DPHE) efficiency. The review examines several types of nanofluids, that is, water‐based graphene oxide and CuO–water nanofluids, assessing their effectiveness under different operating conditions, including inlet temperature and nanoparticle volume ...
Farhan Lafta Rashid +8 more
wiley +1 more source