Characterization of a pollutant source in aerodynamics from inversion of measurements concentration

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This numerical study deals with the inverse problem of estimating the intensity and the position of a pollutant source. The estimation of time-varying emission rates of pollutant sources of H2S in a sewer chamber is first implemented through inversion of concentration measurements using the modal identification method. A specific method based on transmittance functions between sensors output is used 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 are then compared to the output of 1D analytical model for the transport equation. A nonlinear minimization algorithm is used to estimate the velocity and the diffusion coefficient first and the source position next, under some assumption.

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Technical datasheet
- Year of publication
  
  2010
- Language
  
  Fran ais
- Discipline(s)
  
  Aéraulique - ventilation - captage
- Author(s)
  
  MAALEJ T., FONTAINE J.R.
- Reference
  
  Les Notes Sscientifiques et Techniques de l'INRS, November 2010, NS291, 129 p.