Some Aerodynamic Aspects of Centrifugal Fan Characteristics of an Automotive HVAC Blower

Kwon, Eui-Yong; Baek, Kyung-Wook; Cho, Nam-Hyo; Kim, Han-Kyung; Jung, Ik-Jin

doi:10.4271/2001-01-0291

Cited by 6 publications

(3 citation statements)

References 3 publications

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“…When reversing main special designed fans, the mine operator usually does not know about operating characteristics of flow and pressure to expect. Laboratory and field tests of vane axial main special designed fans were conducted to establish forward and reverse performance characteristics under controlled conditions and in typical mine installations [12][13][14][15][16][17][18][19]. All fans tested were between 81 and 96 in.…”

Section: Figure 1 Axial Fan Of Produced By Cvs Comentioning

confidence: 99%

CFD Modeling and Multi-Objective Optimization of the Axial Fan Parameters

Köten

2018

Journal of Energy Systems

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Axial fans are widely used in many areas to provide necessary air and heat and mass transfer, especially in HVAC industry. These fans are designed according to their cooling, heating and drying needs. In this optimization study, the performance of the 16-blade novel design axial fan CVS-AJ-R 1000 is analyzed in 3D using Computational Fluid Dynamics (CFD) technique. First, forward skewed 3D CAD geometry of axial fan is drawn and normalized for CFD pre-processing step. Then volumetric flow rates, pressures, energy consumptions and air velocities are evaluated in inlet and outlet region optimizing blade angle, shroud angle and other design parameters. Results are agreed with experimental studies. Optimized results are discussed and reported comparing with literature studies. As a results, the static pressure in the best-case decreases from 87.79 Pa to 54.59 Pa, the flow rate increases from 1.3 m3/sec to 2.78 m3/sec at 1550 rpm.

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Section: Figure 1 Axial Fan Of Produced By Cvs Comentioning

confidence: 99%

CFD Modeling and Multi-Objective Optimization of the Axial Fan Parameters

Köten

2018

Journal of Energy Systems

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“…On the other hand, the outlet flow field of a centrifugal fan is usually not homogeneous and typically contains significant crossflow and swirl, which is mostly generated by the inevitable secondary flow motion in the volute and by impeller volute interactions [13,14]. Several flow measurement studies have demonstrated that strong vortices can exist at or close to the outlet of centrifugal fans [12,15,16], which can also result in a rotation of the emanating jet. Hence, the design of impingement cooling arrangements involving centrifugal fans is not a straightforward process, if heat transfer shall be optimized and, potentially also, if the hot airflow shall subsequently be redirected in an ideal manner.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Numerical Flow Simulations of a Centrifugal Electronic Cooling Fan Using Four Different Turbulence Models

Kirchhofer,

Krieger,

Hofer

2023

Energies

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In this study the flow field of a centrifugal electronic cooling fan operating at an off-design point of 0 Pa static fan pressure is investigated by means of Computational Fluid Dynamics. The results obtained by four different turbulence models, the realizable k-ϵ model, the SST k-ω model, a Reynolds Stress Model, and Scale-Adaptive Simulation are analyzed and compared. The focus lies on describing how the flow through impeller and volute influences the fan outlet flow field, and velocity profiles and velocity fluctuations at the outlet are compared to previously published measurements. All models tend to underpredict the measured outlet flow rate, but are capable of producing the characteristic C-shaped profile of high velocities, previously determined in Constant Temperature Anemometry measurements. However, the realizable k-ϵ model is significantly too diffusive, leading to blurred velocity contours. The other models exhibit reasonable agreement with the measured flow field, but show differences in a number of aspects. The SST k-ω model, for instance, even produces local inflow in a confined area. The SAS approach overpredicts the length of the lower lobe of the C-shape. The research is relevant to improve simulation results of impingement cooling and heat sink optimization using centrifugal fans.

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“…An evaluation of the vibration and noise contribution by the computational fluid dynamics (CFD) method has been an attractive option for the last two decades. Although there are extensive studies involving CFD method, they are only limited to thermal and airflow characteristics with limited components (Fischer, 1995;Kwon et al, 2015). Comparatively, lab-scale systems offered a detailed understanding with lower time consumption, particularly involving the investigation of reverberation in the vehicle cabin area, in which the CFD method has a higher computational time (Sah et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Archives of Acoustics

Satar

Mazlan

Hamdan

et al. 2021

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Heating, ventilation and air conditional (HVAC) system provides a cold ventilation for the comfort of the driver and passengers in a vehicle. However, the vibration induced by the HVAC contributes to a reasonable level of noise emission, and hissing is one of the critical noises. So far, the characterization of hissing noise from the vehicle is least to be reported compared to other type of noises. Hence, this paper investigates the occurrence of hissing noise from several HVAC components. A lab-scale HVAC system was developed to imitate the real-time operations of the vehicle HVAC system. Two engine conditions, namely as ambient and operating conditions, were tested at speed of 850 rpm and 850-1400 rpm, with the blower speed maintained constantly at one level. The result shows that the hissing noise from the labscale HVAC was produced at frequency range of 4000-6000 Hz. The finding also highlights that the main component contributors of noise emission are an evaporator and a thermal expansion valve. The validation with a real vehicle system showed a good consensus whereby the hissing noise was produced at the similar operating frequency ranges. Also, the hissing noise was found to be louder when in an operating condition which could be taken into consideration by the vehicle manufacturers to improve the HVAC design.

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Some Aerodynamic Aspects of Centrifugal Fan Characteristics of an Automotive HVAC Blower

Cited by 6 publications

References 3 publications

CFD Modeling and Multi-Objective Optimization of the Axial Fan Parameters

CFD Modeling and Multi-Objective Optimization of the Axial Fan Parameters

A Comparative Study on Numerical Flow Simulations of a Centrifugal Electronic Cooling Fan Using Four Different Turbulence Models

Archives of Acoustics

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