Caractérisation d'une source de polluant en aéraulique à partir d'inversion de mesures de concentration

Abstract : This numerical study deals with the inverse problem of estimating the intensity and the positionof a pollutant source. The estimation of time-varying emission rates of pollutant sources of H2S in asewer chamber is first implemented through inversion of concentration measurements using the modal identification method. A specific method based on transmittance functions between sensors output isused to estimate the source position. Regularization tools are applied to estimate each transmittance,whose convolution product with the concentration of a reference sensor models the response of any sensor.Transmittances estimated from simulated concentration signals in a tunnel flow with a point source arethen compared to the output of 1D analytical model for the transport equation. A nonlinear minimizationalgorithm is used to estimate the velocity and the diffusion coefficient first and the source position next,under some assumption
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Talal Maalej. Caractérisation d'une source de polluant en aéraulique à partir d'inversion de mesures de concentration. Autre. Institut National Polytechnique de Lorraine, 2010. Français. ⟨NNT : 2010INPL077N⟩. ⟨tel-01748846⟩

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