Exploration of a novel three-dimensional knitted spacer air filter with low pressure drop on cooking fume particles removal

2020 ◽  
Vol 177 ◽  
pp. 106903 ◽  
Author(s):  
Ying Sheng ◽  
Le Zhang ◽  
Yanqiang Wang ◽  
Zhuangzhuang Miao
Keyword(s):  
Pressure Drop ◽  
Three Dimensional ◽  
Low Pressure ◽  
Air Filter ◽  
Cooking Fume

A lottery draw machine-inspired movable air filter with high removal efficiency and low pressure drop at a high flow rate

2019 ◽  
Vol 7 (11) ◽  
pp. 6001-6011 ◽  
Author(s):  
Nara Han ◽  
Yo Seph Lee ◽  
Byung Kwon Kaang ◽  
Wooree Jang ◽  
Hye Young Koo ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Pressure Drop ◽  
Electric Field ◽  
Removal Efficiency ◽  
Flow Rate ◽  
Low Pressure ◽  
High Flow ◽  
High Electric Field ◽  
High Flow Rate ◽  
Air Filter

A lottery draw machine-inspired novel movable air filter (MAF) system is presented in which MAFs are vigorously moved or rotated to form a high electric field and capture particulate matter (PM) particles.

Flexible hydroxyapatite ultralong nanowire-based paper for highly efficient and multifunctional air filtration

2017 ◽  
Vol 5 (33) ◽  
pp. 17482-17491 ◽  
Author(s):  
Zhi-Chao Xiong ◽  
Ri-Long Yang ◽  
Ying-Jie Zhu ◽  
Fei-Fei Chen ◽  
Li-Ying Dong
Keyword(s):  
Pressure Drop ◽  
Filter Paper ◽  
Low Pressure ◽  
Air Filtration ◽  
Air Filter ◽  
Highly Efficient ◽  
Removal Efficiencies

Ultralong hydroxyapatite nanowire-based air filter paper with a low pressure drop and high removal efficiencies for PM2.5 and PM10 has been developed.

scholarly journals Multi-Layered, Corona Charged Melt Blown Nonwovens as High Performance PM0.3 Air Filters

Polymers ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 485
Author(s):  
Xing Zhang ◽  
Jinxin Liu ◽  
Haifeng Zhang ◽  
Jue Hou ◽  
Yuxiao Wang ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Test Performance ◽  
High Performance ◽  
Aerosol Particles ◽  
Low Pressure ◽  
Magnesium Stearate ◽  
Filtration Efficiency ◽  
Loading Test ◽  
Air Filter ◽  
Adverse Influence

Particulate matter (PM) and airborne viruses bring adverse influence on human health. As the most feasible way to prevent inhalation of these pollutants, face masks with excellent filtration efficiency and low press drop are in urgent demand. In this study, we report a novel methodology for producing high performance air filter by combining melt blown technique with corona charging treatment. Changing the crystal structure of polypropylene by adding magnesium stearate can avoid charge escape and ensure the stability of filtration performances. Particularly, the influence of fiber diameter, pore size, porosity, and charge storage on the filtration performances of the filter are thoroughly investigated. The filtration performances of the materials, including the loading test performance are also studied. The melt blown materials formed by four layers presented a significant filtration efficiency of 97.96%, a low pressure drop of 84.28 Pa, and a high quality factor (QF) of 0.046 Pa−1 for paraffin oil aerosol particles. Meanwhile, a robust filtration efficiency of 99.03%, a low pressure drop of 82.32 Pa, and an excellent QF of 0.056 Pa−1 for NaCl aerosol particles could be easily achieved. The multi-layered melt blown filtration material developed here would be potentially applied in the field of protective masks.

Washable antimicrobial polyester/aluminum air filter with a high capture efficiency and low pressure drop

2018 ◽  
Vol 351 ◽  
pp. 29-37 ◽  
Author(s):  
Dong Yun Choi ◽  
Ki Joon Heo ◽  
Juhee Kang ◽  
Eun Jeong An ◽  
Soo-Ho Jung ◽  
...  
Keyword(s):  
Pressure Drop ◽  
Low Pressure ◽  
Capture Efficiency ◽  
Air Filter

Modeling Flow Across a Race Car Air Filter

2006 ◽  
Author(s):  
Robert Binns ◽  
Kim A. Shollenberger
Keyword(s):  
Boundary Condition ◽  
Pressure Drop ◽  
Numerical Simulations ◽  
Three Dimensional ◽  
Filter Material ◽  
Fuel Mixture ◽  
Air Filter ◽  
Pressure Drops ◽  
Curve Fit ◽  
Visualization Techniques

Air entering a NASCAR stock car travels through an air filter enclosed in an “airbox” before being mixed with fuel. To maximize the mass of air/fuel mixture delivered to the cylinders, it is desired to minimize airflow restrictions. This paper presents a preliminary model to predict pressure drop and airflow across an air filter in a simplified geometry. The model includes experimental measurements and numerical simulations using a three-dimensional finite-volume package. The simplified geometry is a 1.52-m long flow channel with 12.7 cm by 7.97 cm cross-section. Measurements of pressure drop versus air velocity were made for separate and combined elements of the filter. A curve fit to the data is used to calculate coefficients for a porous-jump boundary condition used to model flow through porous media. Numerical simulations were run using this model for each filter element in the simplified geometry to verify that measured and calculated pressure drops agreed. Finally, flow visualization techniques were used to reveal streaklines in the flow. Good agreement was found between calculated streamlines and experimental observations. Thus, the porous jump boundary condition is a valid model for the filter material. Future work will include three-dimensional, transient numerical simulations of airflow within the airbox.

Heart-Like Micro-Flow Mixer

2016 ◽  
Vol 14 (1) ◽  
pp. 343-349 ◽  
Author(s):  
Chin-Tsan Wang ◽  
Yan-Ming Chen ◽  
Shih-Syun Chen
Keyword(s):  
Reynolds Number ◽  
Pressure Drop ◽  
Coupling Effect ◽  
Three Dimensional ◽  
Low Pressure ◽  
Mixing Efficiency ◽  
Inlet Channel ◽  
Flow Mixing ◽  
Micro Flow ◽  
Optimal Mixing

AbstractMicromixers are the microfluidic devices able to rapidly mix more than two liquids, with low pressure drop and high mixing efficiency (εmixing). In this study, the effect of Reynolds number ratio (Rer) and aspect ratio (AR) of heart-like biometric micromixer applied would be investigated by a numerical simulation and experimental confirmation. Results show that the heart-like biometric micromixer resulting from the coupling effect of the split and recombination (SAR) and biometric design can produce a high mixing efficiency, low pressure drop and short mixing path under a case of low Reynolds number. Two dimensional results also find that a flow mixing efficiency of εmixing=0.89 and an optimal mixing index of Midx=115 could be achieved at a flow condition of Rer=0.75 and Re2=0.1 of the middle-inlet channel I2. In additional, the three dimensional results indicate that a high flow mixing efficiency of εmixing=0.84 and the lowest pressure drop of 164.2 Pa was obtained at the flow conditions of Rer=0.9 and AR=10 when the middle-inlet channel I2 was Re2=0.1. These findings will be useful to improvement the efficiency for micromixcers of biometric design in the future.

scholarly journals Investigation of Pressure Oscillation and Cavitation Characteristics for Submerged Self-Resonating Waterjet

2021 ◽  
Vol 11 (15) ◽  
pp. 6972
Author(s):  
Lihua Cui ◽  
Fei Ma ◽  
Tengfei Cai
Keyword(s):  
Sudden Change ◽  
Three Dimensional ◽  
Pressure Oscillation ◽  
Experimental Tests ◽  
Low Pressure ◽  
The Self ◽  
Two Phase ◽  
Cavitation Phenomenon ◽  
Pressure Zone ◽  
Unsteady Characteristics

The cavitation phenomenon of the self-resonating waterjet for the modulation of erosion characteristics is investigated in this paper. A three-dimensional computational fluid dynamics (CFD) model was developed to analyze the unsteady characteristics of the self-resonating jet. The numerical model employs the mixture two-phase model, coupling the realizable turbulence model and Schnerr–Sauer cavitation model. Collected data from experimental tests were used to validate the model. Results of numerical simulations and experimental data frequency bands obtained by the Fast Fourier transform (FFT) method were in very good agreement. For better understanding the physical phenomena, the velocity, the pressure distributions, and the cavitation characteristics were investigated. The obtained results show that the sudden change of the flow velocity at the outlet of the nozzle leads to the forms of the low-pressure zone. When the pressure at the low-pressure zone is lower than the vapor pressure, the cavitation occurs. The flow field structure of the waterjet can be directly perceived through simulation, which can provide theoretical support for realizing the modulation of the erosion characteristics, optimizing nozzle structure.

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