TY - JOUR
T1 - A numerical study of inertial errors in anisokinetic sampling
AU - Liu, B. Y.H.
AU - Zhang, Z. Q.
AU - Kuehn, T. H.
PY - 1989
Y1 - 1989
N2 - A numerical study has been made of the anisokinetic sampling of aerosols from a flowing gas stream by a thin-walled tube. The sampling error due to anisokinetic sampling conditions has been calculated for various ratios of the free stream gas velocity, W, to the mean gas velocity, V, in the sampling tube. The performance of the sampling inlet is characterized by an aspiration coefficient, A, a penetration coefficient, P, and a loss coefficient, L. The values of A, P, and L have been calculated numerically and correlated with the Stokes number and the velocity ratio by means of simple equations. The numerical results for the aspiration coefficient have been found to be in good agreement with the classical study of Belyaev and Levin [J. Aerosol Sci. 3, 127 (1972); 5, 325 (1974)] in the velocity ratio, W/V, range of 0.2-5. Outside this range, some discrepancies were found and the classical Belyaev and Levin's results gave increasingly less accurate results.
AB - A numerical study has been made of the anisokinetic sampling of aerosols from a flowing gas stream by a thin-walled tube. The sampling error due to anisokinetic sampling conditions has been calculated for various ratios of the free stream gas velocity, W, to the mean gas velocity, V, in the sampling tube. The performance of the sampling inlet is characterized by an aspiration coefficient, A, a penetration coefficient, P, and a loss coefficient, L. The values of A, P, and L have been calculated numerically and correlated with the Stokes number and the velocity ratio by means of simple equations. The numerical results for the aspiration coefficient have been found to be in good agreement with the classical study of Belyaev and Levin [J. Aerosol Sci. 3, 127 (1972); 5, 325 (1974)] in the velocity ratio, W/V, range of 0.2-5. Outside this range, some discrepancies were found and the classical Belyaev and Levin's results gave increasingly less accurate results.
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U2 - 10.1016/0021-8502(89)90012-8
DO - 10.1016/0021-8502(89)90012-8
M3 - Article
AN - SCOPUS:0024884605
SN - 0021-8502
VL - 20
SP - 367
EP - 380
JO - Journal of Aerosol Science
JF - Journal of Aerosol Science
IS - 3
ER -