Axial Fan Performance under the Influence of a Uniform Ambient Flow Field

Heinemann, Till; Becker, Stefan

doi:10.1155/2018/6718750

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…The first thing to study is the ventilation performance in confined spaces and environments. The performance evaluation of a general fan mainly focuses on flow, power, and noise [3][4][5]. The study of non-proportional variation law provides an estimated method for the energy-saving rate, which is an important branch of fan energy-saving research [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Fan Aerodynamic Noise Variation Characteristics under Non-Proportional Variation Law

et al. 2023

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This paper presents the noise characteristics of axial fans in the process of variable frequency adjustment, so as to clarify the basis of frequency adjustment and high-risk area division for practical purposes. In the aerodynamic performance experiment, 11 kinds of operating conditions (OC) were divided into 3 groups, and the air flow rate and power consumption were measured. At the same time, an aerodynamic noise experiment was carried out, and nine measuring points were selected to test the noise of the air inlet and shell. The data showed that the aerodynamic performance parameters have the characteristics of non-proportional law. The maximum ventilation coefficient of OC2, OC7, OC11 is 3.9%, and its noise always has a negative growth rate. Furthermore, the typical OC were selected from all experiments, and broadband noise and discrete noise analyses were performed. The results indicated that the fan noise of the changes under variable frequency adjustment may come from boundary layer noise and shedding noise. In addition, the fundamental frequency sound pressure level of discrete noise is the highest in the whole frequency band. At the high-speed condition, the contribution of higher harmonics to the fan overall noise increases, but the broadband noise is still the dominant noise. Finally, the noise rating was introduced, and the high-risk noise index was divided for the noise of the air inlet and the shell. It was found that the main noise variation index of typical OC mostly exceeded the high-risk noise index, and the main target frequency band of noise control is 250–4000 Hz.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Fan Aerodynamic Noise Variation Characteristics under Non-Proportional Variation Law

et al. 2023

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“…The role of the guide vane is essential as the swirl becomes stronger. The strong swirl contained at the blade outlet means that there is sufficient margin for static pressure recovery [9,10]; therefore, the design of the guide vane is worthwhile for the wall-mounted axial fan. The guide vane can be designed from the empirical selection of the effective parameters obtained through the analysis of flow patterns at the blade outlet [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of Two- and Three-Dimensionally Designed Guide Vanes with Different Camber Length on Static Pressure Recovery of a Wall-Mounted Axial Fan

Kim

Choi²,

Jeong³

et al. 2021

Processes

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This study was based on a numerical effort to use the motor support (prop) as a guide vane when the motor of a wall-mounted axial fan was located at the fan outlet while maintaining the structural and spatial advantage. The design for the guide vane followed two- and three-dimensional methods. The inlet vane angle, meridional length (total), and meridional length with a vane angle of zero (0) degrees (linear) were considered as design variables. At the design and some low flow rate points, the 2D design offered the most favorable performance when the meridional length with a vane angle of zero (0) degrees (linear) was 30% based on total length, and was the worst for 70%. The 3D design method applied in this study did not outperform the 2D design. In the 2D design concept, averaging the flow angle for the entire span at the design flow rate could ensure a better pressure rise over a more comprehensive flow rate range than weighting the flow angle for a specific span. In addition, the numerical results were validated through an experimental test, with an important discussion of the swirl (dynamic pressure) component. The influence of the inlet motor and turbulence model are presented as a previous confirmation.

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“…Many scholars have studied the flow characteristic of cooling system in depth. Heinemann and Becker 1 investigated integral influence of multiple angle between uniform ambient flow field and fan axis on performance curve of two distinct axial fan with inlet modification. The results indicate that the perpendicular inlet cross-flow has a detrimental influence on fan performance.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the effect of different components collocations on flow of automotive cooling fan

Wen

Hao

Zhang

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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The flow structure in the downstream region of the cooling fan has great impact on engine heat dissipation. An integrated PIV measurement system was designed and constructed to understand the flow field behind the cooling fan. In order to analyze the influence of interaction of different components on flow structure in downstream region, a series of experiments were conducted in four arrangements at three flow coefficients. The flow field was evaluated by velocity profile, vorticity, and turbulent intensity. These flow data reflect the effect of isolated components and their combinations quantitatively. This work provides useful information for engine cooling system design.

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Axial Fan Performance under the Influence of a Uniform Ambient Flow Field

Cited by 6 publications

References 22 publications

Experimental Study on Fan Aerodynamic Noise Variation Characteristics under Non-Proportional Variation Law

Experimental Study on Fan Aerodynamic Noise Variation Characteristics under Non-Proportional Variation Law

Effect of Two- and Three-Dimensionally Designed Guide Vanes with Different Camber Length on Static Pressure Recovery of a Wall-Mounted Axial Fan

Experimental study on the effect of different components collocations on flow of automotive cooling fan

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