원문정보
초록
영어
To solve the technical problems existing in air purification, a multileveled air purification device is presented. And the new device consists of catalytic purifying technology, low-temperature plasma, nanoscaled titania and dual-band ultraviolet. To deeply take a research on performance of the composite purification device, the device has been numerically simulated, with CFD simulation technology, through employing gas phase turbulence model, porous medium model and stochastic particle trajectory model. Comparative analyses on pressure distribution of internal flow field, velocity distribution, particle motion state and mass concentration distribution are made under different wind speed. The most appropriate wind speed can provide better centrifugal effect and less pressure loss. So some rules of velocity, pressure distribution and the particulate mass concentration distribution at all levels after filtering in internal device are acquired. In the meanwhile, a comparison among different research results has been made, and it helps to prove the reliability of this method.
목차
Introductions
1. Structure and Principles
1.1. Structure of Composite Purifying Device
1.2. The Purification Mechanism Analyses
2. Numerical Simulation Calculations and Results Analyses
3. Computational Modeling and Grid Division
3.1. The Gas Phase Turbulence Model
3.2. Porous Media/Fluid Coupling
3.3. Geometry Modeling and Grid Division
3.4. The Boundary Condition Set
3.5. The Grid Independence and Confirmation of Simulation Results
4. Results and Analyses
4.1. Pressure & Velocity Distribution of Primary Filter in Composite Air Purification Device
4.2. Pressure and Velocity Distribution of Needle Plate-Type Low-Temperature Plasma Generator in Composite Purification Device
4.3. Particle Mass Concentration Distribution
4.4. Numerical Calculations and Results Comparisons
5. Conclusions
Reference