Light transmittance across smoke plumes downwind from point sources of aerosol emissions

Ensor, David; Sparks, L.E.; Pilat, Michael J.

doi:10.1016/0004-6981(73)90136-4

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…Smoke transmittance, which provides an objective and quantitative evaluation criterion, is a key parameter for evaluating the interference capability of smoke screen [9][10][11][12]. In previous smoke transmittance measurement studies, traditional methods rely on a spectrometer to receive point-to-point target radiation in line of sight, so field of view is limited to a narrow area due to equipment specifications [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Numerical Approach for Field Infrared Smoke Transmittance Based on Grayscale Images

et al. 2017

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Infrared smoke screen has been playing an important role in electro-optical countermeasures on the battlefield. Smoke transmittance is one of the most important parameters which can evaluate the obscuration performance of smoke. In this paper, an efficient numerical approach for field infrared smoke transmittance based on grayscale images is presented. Firstly, a field trial experimental setup is introduced. Then a grayscale smoke transmittance mathematical model is deduced and built. In addition, an image processing algorithm is used to extract the gray values of certain pixel points from grayscale images, and the positions of the selected points are discussed. Lastly, a field trial sample calculation is included to illustrate the procedure of the proposed method. The results prove to be of enough precision for engineering applications, and the method has greatly simplified the field trial process, thus improving efficiency.

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Section: Introductionmentioning

confidence: 99%

An Efficient Numerical Approach for Field Infrared Smoke Transmittance Based on Grayscale Images

et al. 2017

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Visual impact of plumes from power plants: A theoretical model

Latimer

Samuelsen

1978

Atmospheric Environment (1967)

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-Theoretical relationships have been derived and transformed into a computer model to describe plume visual impact at various observer vantage points resulting from power plant boiler operation. Plume visual impact results from a reduction in visual range (visibility) and plume cotoration. The model considers plume transport and diffusion, light scattering and absorption by aerosols and gases, and chemical transformation in the plume of nitric oxide to nitrogen dioxide, sulfur dioxide to sulfates, and nitrogen oxides to nitrates.The model is applied in a parametric study to explore the effect of emissions and environmental conditions on plume visual impact. The case selected is a hypothetical 1500 Mwe coal-fired power plant equipped with efficient particulate abatement equipment. The results establish that visual range is not significantly affected unless the observer is viewing along the plume axis or unless significant amounts of secondary particles are formed in the plume. Yellow-brown plume coloration is shown to result from the net production of nitrogen dioxide gas in the plume. The coloration is most apparent during stable and clear atmospheric conditions and effectively masked for elevated concentrations of background or plume aerosol.

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Light transmittance across smoke plumes downwind from point sources of aerosol emissions

Cited by 2 publications

References 7 publications

An Efficient Numerical Approach for Field Infrared Smoke Transmittance Based on Grayscale Images

An Efficient Numerical Approach for Field Infrared Smoke Transmittance Based on Grayscale Images

Visual impact of plumes from power plants: A theoretical model

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