Atomic flux distribution from a low-divergent dark wall oven

The technological innovation in the field of lighting and the need to reduce energy consumption connected to public lighting are leading many municipalities to undertake the renewal of public lighting systems, by replacing the existing luminaires with LED technologies. This renovation process is usually aimed at increasing energy efficiency and reducing maintenance costs, whist improving the lighting performance. To achieve these results, the new luminaires are often characterised by a luminous flux distribution much more downward oriented, which may remarkably influence and alter the perception of the night image of the sites. In this study the implications of the renovation of public lighting systems in terms of lighting and energy performance as well as the effects relating to the alteration of the night image, in historical contexts characterized by significant landscape value, are analysed. Results, along with demonstrating the positive effect that more sustainable and energy efficient lighting systems may have on the lighting performance and energy consumptions of public lighting systems, evidences the impact they may have on the alteration of the nocturnal image.

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Post-installation heliostat field aiming strategy optimization based on heliostat flux distribution measurements

10.1063/5.0028541 ◽

2020 ◽

Author(s):

Ruidi Zhu ◽

Dong Ni ◽

Tianfeng Yang ◽

Jiamin Yang ◽

Jinli Chen ◽

...

Keyword(s):

Flux Distribution

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Theory of Interdiffusion in Solids

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.258-260.52 ◽

2006 ◽

Vol 258-260 ◽

pp. 52-58

Author(s):

Y.C. Chen

Keyword(s):

Subject Matter ◽

Phase Growth ◽

Atomic Flux ◽

The Subject ◽

Induced Stresses ◽

Volume Unit ◽

The Relationship

Traditional theories of interdiffusion in solids based on Fick’s first and second laws and Darken’s equations can not describe the relationship between the diffusion fluxes and the diffusion-induced stresses, because the subject matter of the traditional theories is the diffusing atom or atomic flux, not the volume unit within the interdiffusion field. For this reason, it is suggested that the concept of flow point in the interdiffusion field should be constructed to describe the diffusion-induced stresses and the phase growth.

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Modeling and simulation of 1MWe solar tower plant’s solar flux distribution on the central cavity receiver

Simulation Modelling Practice and Theory ◽

10.1016/j.simpat.2012.07.011 ◽

2012 ◽

Vol 29 ◽

pp. 123-136 ◽

Cited By ~ 35

Author(s):

Qiang Yu ◽

Zhifeng Wang ◽

Ershu Xu ◽

Hongli Zhang ◽

Zhenwu Lu ◽

...

Keyword(s):

Modeling And Simulation ◽

Flux Distribution ◽

Solar Flux ◽

Central Cavity

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Interaction of Wheelspace Coolant and Main Flow in a New Aeroderivative LPT

Volume 6: Turbomachinery, Parts A and B ◽

10.1115/gt2006-90877 ◽

2006 ◽

Cited By ~ 2

Author(s):

Francesco Montomoli ◽

Michela Massini ◽

Nicola Maceli ◽

Massimiliano Cirri ◽

Luca Lombardi ◽

...

Keyword(s):

Flux Distribution ◽

Low Pressure ◽

Main Flow ◽

Space Region ◽

Heat Flux Distribution ◽

Gas Generator ◽

Component Reliability ◽

Accuracy Requirement ◽

Low Pressure Turbine ◽

Hot Gas

Increased computational capabilities make available for the aero/thermal designers new powerful tools to include more geometrical details, improving the accuracy of the simulations, and reducing design costs and time. In the present work, a low-pressure turbine was analyzed, modeling the rotor-stator including the wheel space region. Attention was focused on the interaction between the coolant and the main flow in order to obtain a more detailed understanding of the behavior of the angel wings, to evaluate the wall heat flux distribution, and to prevent hot gas ingestion. Issues of component reliability related to thermal stress require accurate modeling of the turbulence and unsteadiness of the flow field. To satisfy this accuracy requirement, a full 3D URANS simulation was carried out. A reduced count ratio technique was applied in order to decrease numerical simulation costs. The study was carried out to investigate a new two-stage Low Pressure Turbine from GE Infrastructure Oil&Gas to be coupled to a new aeroderivative gas generator, the LM2500+G4, developed by GE Infrastructure, Aviation.

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