Flow Driven by a Stamped Metal Cooling Fan – Parametric Study on Blade Angles

Li, Hongmin

doi:10.1080/19942060.2010.11015312

Cited by 5 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The air flow rate increases with the rotation speed in a linear fashion. This agrees with the previous experimental and numerical results (Li, 2009 and2010). This linear correlation is due to the actual working condition of stamped metal axial flow fans.…”

Section: Flow Structures At Zero Pressure Headsupporting

confidence: 82%

See 1 more Smart Citation

Effects of Edge Geometry on Flow Driving of a Stamped Metal Cooling Fan

Li¹

2010

Engineering Applications of Computational Fluid Mechanics

Self Cite

View full text Add to dashboard Cite

Stamped metal axial flow fans are popularly employed in electric motors as a cooling flow driving impeller. Manufacturing experiences have shown that the edge geometries of the blades have significant effects on the noise level of the electric motors. This paper presents a numerical study on the structures of the air flows driven by a stamped metal cooling fan with blunt edge, sharp edge, and zero thickness blades. The local flow velocities, pressure distributions, and overall flow driving performances are analyzed. The different noise generation levels due to the blade edge geometries are explained and correlated to the fluid flow process at various fan working conditions. Guidelines on the implementation of sharp edge stamped metal cooling fans in electric motors are provided.

show abstract

Section: Flow Structures At Zero Pressure Headsupporting

confidence: 82%

“…The model was also used for a parametric study on the stamped metal cooling fan blade angles (Li, 2010). Detailed description of the numerical model can be found in these two articles.…”

Section: Numerical Modelmentioning

confidence: 99%

Effects of Edge Geometry on Flow Driving of a Stamped Metal Cooling Fan

Li¹

2010

Engineering Applications of Computational Fluid Mechanics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Kimotho et al [6] improved the thermal performance up to 15% based on the end winding temperature, by applying housing fin shapes to a blushless direct current permanent magnet motor via computational fluid dynamics (CFD) analysis. Li [7] analyzed the fluid movement by altering the angles of the cooling fan blades that are equipped in an electric motor, and determined an optimal motor cooling design from the cooling flow rate and the fan efficiency.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance of Motor and Inverter in an Integrated Starter Generator System for a Hybrid Electric Vehicle

Kim

2013

Energies

View full text Add to dashboard Cite

Abstract:If the integrated starter generator (ISG) motor and inverter operate under continuously high loading conditions, the system's performance and durability will decrease and the heat dissipation requirements will increase. Therefore, in this study, we developed two cooling designs for the ISG motor and inverter, and then carried out both a model analysis and an experiment on the fluid flow and thermal characteristics of the system under various operating conditions. As the outdoor temperature increased from 25 °C to 95 °C, the coil temperature of the air-cooled motor increased by about 82 °C. Under the harsh-air condition of 95 °C, the coil of the air-cooled motor increased to a maximum temperature of about 158.5 °C. We also determined that the temperature of the metal-oxide-semiconductor field-effect transistor (MOSFET) chip in the liquid-cooled inverter increased to a maximum temperature of about 96.8 °C under a coolant flow rate of 4 L/min and a coolant temperature of 65 °C. The observed thermal performance of the ISG motor and inverter using the proposed cooling structures was found to be sufficient for heat loads under various real driving conditions for a hybrid electric vehicle (HEV). Keywords

show abstract

“…The TAB model was selected because it has been used successfully for many engineering applications. 27 The SMD was used because it has been widely adopted for the analysis of droplet distributions in pesticide spraying. 28 The SMD formula is…”

Section: Spray Driftmentioning

confidence: 99%

“…The symmetric spray velocity variation is due to the effect of the V-type notch at the nozzle outlet, which has two symmetric slopes relative to the central axis of the nozzle. 26,27 With regard to the velocity magnitude, the transverse spray velocities of bifenthrin are a little larger than those of tea saponin water because of their different viscosities. It should be noted that for any pesticide examined in this study, the spray velocity distributions on the cross-section are very similar, and the corresponding magnitudes are almost identical and there is no obvious differences from each other at concentrations of 1:500, 1:1000, and 1:1500 (see Fig.…”

Section: Spray Uniformitymentioning

confidence: 99%

CFD‐based pesticide selection for a nozzle used in a six‐rotor UAV in hover mode for tea spraying

Dong

Gui

Zhu

et al. 2023

Pest Management Science

View full text Add to dashboard Cite

BACKGROUND A key challenge for unmanned aerial vehicle (UAV) spraying sometimes used in tea plantations is the downwash flow structure there stronger than in crops. In addition, the UAV spray is affected by the relationship between the nozzle design and the pesticide. However, there is little current research on this aspect. As a preliminary step this study focuses on the most appropriate pesticide for a designated nozzle in a six‐rotor UAV according to the nozzle–pesticide relationship using a three‐dimensional computational fluid dynamics model. This model considers the downwash flow structure effect and nozzle spray performance in hover. Nozzle FVP110‐02, widely used in six‐rotor UAVs, is used as a representative nozzle and bifenthrin and tea saponin water, commonly used in tea plantations, are used as the pesticides. RESULTS The downwash flow structure of the six‐rotor UAV in hover was conveniently controlled by the flight height and rotational speed, thereby causing the turbulence to be more stable. For nozzle FVP110‐02, bifenthrin was more appropriate than tea saponin water at the same concentration, whilst bifenthrin and tea saponin water at a concentration of 1:1000 showed the best performance under identical working conditions. CONCLUSION The numerical model developed here was shown to be effective for investigating the relationship between nozzle and pesticide. Our findings will help to not only improve UAV spraying for tea cultivation but also provide guidelines for pesticide selection in crops. Further work will address the comparison of the rigorous qualification of the numerical simulations with the measurements by the field test. © 2023 Society of Chemical Industry.

show abstract

Flow Driven by a Stamped Metal Cooling Fan – Parametric Study on Blade Angles

Cited by 5 publications

References 16 publications

Effects of Edge Geometry on Flow Driving of a Stamped Metal Cooling Fan

Effects of Edge Geometry on Flow Driving of a Stamped Metal Cooling Fan

Thermal Performance of Motor and Inverter in an Integrated Starter Generator System for a Hybrid Electric Vehicle

CFD‐based pesticide selection for a nozzle used in a six‐rotor UAV in hover mode for tea spraying

Contact Info

Product

Resources

About