Measurement of Aerosol Deposition Rates in Turbulent Flows

摘要

The transport of fission products through reactor primary systems under postulated accident conditions is dependent on the deposition of aerosol particles onto various surfaces. Of particular interest is the case where deposition is from turbulent gas flow since this condition is expected to exist with significant frequency, and available theories for predicting transport under these conditions were largely unverified experimentally. Therefore, in this study, deposition rates of aerosol particles onto pipe walls under turbulent flow conditions were measured. Moderately monodispersed dioctyl phthalate aerosols of six different mean sizes ranging from 0.035 to 1.3 micrometers were used in gas flows whose Reynolds numbers were controlled at selected values between 5500 and 15,500. An empirical correlation equation which accommodates the measured data in that regime was developed to supplement the existing theories and provide a suitable method for predicting deposition rates.