Soot Distribution Characteristics and Its Influence Factors in Burner-Type Regeneration Diesel Particulate Filter
Abstract
:1. Introduction
2. Numerical Calculation Method
2.1. Governing Equation
2.2. Turbulence Equation
2.3. Soot Loading Equation
2.4. Regeneration Reaction Equation of Burner-Type Regeneration DPF
3. Model Establishment and Boundary Conditions
3.1. Geometric Modeling and Meshing
3.2. Grid Independence
3.3. Model Verification
3.4. Model Selection and Setting
4. Simulation Results and Analysis
4.1. Effect of Temperature on Soot Distribution
4.2. Effect of Exhaust Mass Flow on Soot Distribution
4.3. Effect of Soot Loading on Soot Distribution
4.4. Effect of Channel Density on Soot Distribution
4.5. Effect of the Ratio of Inlet and Outlet Channel on the Distribution of Soot
4.6. Effect of Aspect Ratio on Soot Distribution
5. Conclusions
- (1)
- The soot distribution characteristics of burner-type regenerative DPF: the soot mass concentration first rises rapidly to the maximum value. The burner-type regeneration begins to decrease rapidly to lower values. Soot thickness increased gradually with increasing of the channel location.
- (2)
- With the increase in exhaust mass flow rate and soot load, the mass concentration of soot and the thickness of soot increase. The soot concentration and thickness decreased with the increase in temperature. When the temperature exceeds 750 K, the mass concentration and thickness of soot decrease, and the soot begins to regenerate. Among the exhaust parameters, the exhaust mass flow rate has the greatest influence on the soot distribution, which is due to the large change in flow uniformity due to the change in flow velocity.
- (3)
- The ratio of the filter length to filter diameter, the ratio of the inlet and outlet channels, and the channel densities have little effect on the mass concentration of soot. The soot mass concentration increases with the increase in the channel density. In addition to the length–diameter ratio of 2.1, soot thickness and rising rate increase with the increase in the ratio of filter length to filter diameter. With the increase in channel density and the ratio of the inlet and outlet channels, the soot thickness decreases. Among the structural parameters, the channel density has the greatest influence on the soot distribution.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameters | Numerical Value |
---|---|
Filter size | Ф120 mm × 180 mm |
Channel diameter | 1.397 mm |
density | 1500 kg/m3 |
Specific heat capacity | 1250 J/kg · K |
Thermal Conductivity | 5 W/m · K |
Wall thickness | 0.39 mm |
Intake and exhaust pipe diameter | 60 mm |
Permeability of soot filter cake layer | 5 × 10−15 m2 |
Channel wall permeability | 1 × 10−13 m2 |
Schemes | Parameters | Cases |
---|---|---|
1 | Cell density (cpsi) | 200 |
Soot load (g/L) | 0.2 | |
Exhaust mass flow rate (kg/s) | 0.063 | |
Exhaust temperature (K) | 700, 750, 800, 850, 900, 950 | |
2 | Cell density (cpsi) | 200 |
Soot load (g/L) | 0.2 | |
Exhaust temperature (K) | 850 | |
Exhaust mass flow rate (kg/s) | 0.033, 0.048, 0.063, 0.078, 0.093, 0.108 | |
3 | Cell density (cpsi) | 200 |
Exhaust mass flow rate (kg/s) | 0.063 | |
Exhaust temperature (K) | 850 | |
Soot load (g/L) | 0.05, 0.1, 0.15, 0.2, 0.25, 0.3 | |
4 | Exhaust mass flow rate (kg/s) | 0.063 |
Exhaust temperature (K) | 850 | |
Soot load (g/L) | 0.2 | |
Cell density (cpsi) | 100, 150, 200, 250, 300, 350 | |
5 | Exhaust mass flow rate (kg/s) | 0.063 |
Exhaust temperature (K) | 850 | |
Soot load (g/L) | 0.2 | |
Cell density (cpsi) | 200 | |
Ratio of inlet and outlet channels | 1, 1.1, 1.2, 1.3, 1.4, 1.5 | |
6 | Exhaust mass flow rate (kg/s) | 0.063 |
Exhaust temperature (K) | 850 | |
Soot load (g/L) | 0.2 | |
Cell density (cpsi) | 200 | |
Ratio of length and diameter | 0.6, 0.9, 1.2, 1.5, 1.8, 2.1 |
Parameters | Values | |||||
---|---|---|---|---|---|---|
Ratio | 0.6 | 0.9 | 1.2 | 1.5 | 1.8 | 2.1 |
Length/mm | 97.8 | 127.8 | 154.8 | 180 | 203.4 | 224.7 |
Diameter/mm | 163 | 142 | 129 | 120 | 113 | 107 |
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Jia, G.; Tian, G.; Zuo, H.; Zhong, C.; Zhang, B. Soot Distribution Characteristics and Its Influence Factors in Burner-Type Regeneration Diesel Particulate Filter. Processes 2022, 10, 2029. https://doi.org/10.3390/pr10102029
Jia G, Tian G, Zuo H, Zhong C, Zhang B. Soot Distribution Characteristics and Its Influence Factors in Burner-Type Regeneration Diesel Particulate Filter. Processes. 2022; 10(10):2029. https://doi.org/10.3390/pr10102029
Chicago/Turabian StyleJia, Guohai, Guoshuai Tian, Hongyan Zuo, Chao Zhong, and Bin Zhang. 2022. "Soot Distribution Characteristics and Its Influence Factors in Burner-Type Regeneration Diesel Particulate Filter" Processes 10, no. 10: 2029. https://doi.org/10.3390/pr10102029