| Abstract:A mathematical model for diesel particulate filter (DPF) pressure drop and capture efficiency was developed in order to lower the pressure drop and improve the capture efficiency of DPF. The impacts of wall thickness, carrier ratio, and cell density on DPF performance were methodically examined using an experimental methodology and polynomial approximation algorithm. The findings show that pressure drop and capture efficiency are highly influenced by carrier ratio and wall thickness. The DPF pressure drop is relatively low and the capture efficiency is relatively good when the carrier ratio and wall thickness are within the ranges of (1.40, 1.53) and (0.249, 0.267), respectively. At a carrier ratio of 1.52 and a wall thickness of 0.264, the pressure drop reaches a minimum of 4.23 kPa, with a capture efficiency of 90.28%. The polynomial approximation algorithm yielded explicit expressions for the pressure drop model and capture efficiency model: Pressure drop model Y=51.19+3.815x1-8.726x2+3.794x1^2-1.735x1x2+0.524x2^2; Capture efficiency model Y=0.383+0.105x1+0.085x2+0.032x1^2-0.016x1x2-0.0032x2^2. With coefficients of determination of 0.9996 and 0.9985, respectively, and root mean square errors of 0.0110 and 0.0002, respectively, the DPF pressure drop and capture efficiency models show good predictive accuracy and fit. |