Parametric Study and Optimization of Ceiling Fan Blades for Improved
                        Aerodynamic Performance

Adeeb, Ehsan; Maqsood, Adnan; Mushtaq, Ammar; Sohn, Chang Hyun

doi:10.29252/jafm.09.06.25808

Cited by 15 publications

(11 citation statements)

References 18 publications

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“…The values of the four response parameters selected in this research are listed in Table 2. All values of volumetric flow rate and mass flow rate were taken 1.5 m below the ceiling fan, and measurements were obtained as explained by Adeeb et al (2016).…”

Section: Resultsmentioning

confidence: 99%

Design Optimization of Ceiling Fan Blades with Nonlinear Sweep Profile

Adeeb¹,

Sohn²,

Maqsood³

et al. 2018

JAFM

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This study pertains to the design optimization of a four-blade ceiling fan to enhance air circulation and energy efficiency. The sweep angle of the blade profile is nonlinear. The design of experiment (DOE) computational fluid dynamics (CFD) and response surface method (RSM) methods were used in parallel to find the optimal design solution. The design variables considered were inboard angle of attack, outboard angle of attack, blade sweep, and tip-chord length. Numerical simulations were conducted using steady state Reynolds-averaged Navier-Stokes (RANS) equations and the Spalart-Allmaras turbulence model. The baseline results were validated through experimental data. Subsequently, the DOE method was employed to generate the blade design which reduce the number of simulations without losing the influence of different geometric parameter interactions. The response variables studied were volume flow rate, mass flow rate, torque, and energy efficiency. The simulations exhibited that flow pattern has a distinct feature and is further classified into three groups. In the end, the optimal blade design was identified using response surface methodology (RSM).

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Section: Resultsmentioning

confidence: 99%

Design Optimization of Ceiling Fan Blades with Nonlinear Sweep Profile

Adeeb¹,

Sohn²,

Maqsood³

et al. 2018

JAFM

Self Cite

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“…Among the kε models the Standard kε [1; 43-45; 48], as well as the Realizable kε model [46; 49] were applied. Besides that, also the SpalartAllmaras turbulence model is from particular interest, because it showed better agree ment with distant velocity measurements compared with the Standard kε and the kw model [15] as well as RNG kε [42].…”

Section: Measurementsmentioning

confidence: 96%

“…With the exception of the study shown in [15], sequential solutions were always used in the available studies (with documented pressure solution). A corresponding com parison could not be taken from the available literature.…”

Section: Boundary Conditions Cfd Simulationmentioning

confidence: 99%

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Comparison of stationary and transient RANS modelling

et al. 2020

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Vergleich stationärer und transienter RANS‐Modellierung zur Analyse der räumlichen Geschwindigkeitsverteilung unter Anwendung deckenintegrierter Ventilatoren Deckenventilatoren ermöglichen eine Erhöhung der lokalen Luftgeschwindigkeit am menschlichen Körper. Durch die damit verbundene Wärmeabfuhr steigt die Nutzertoleranz gegenüber warmen Umgebungen. In dieser Studie wird die Anwendung statistischer Turbulenzmodelle (RANS) zur Modellierung der durch deckenintegrierte Ventilatoren induzierten Luftströmung dargestellt. Ein besonderer Fokus wird hierbei auf den Vergleich zwischen stationärer und transienter Simulation gesetzt. Die Ergebnisse der CFD‐Simulation (mittels Fluent) werden mit Messergebnissen der horizontalen Geschwindigkeitsverteilung verglichen. Die Studie zeigt, dass die transiente Simulation mittels Realizable k‐ε Modell zwar ein stabiles Konvergenzverhalten sowohl seitens der Residuen, als auch der Zielwerte aufzeigt, im Vergleich zur stationären Berechnung jedoch der mittlere absolute Fehler in 1,4 m Entfernung zum Ventilator größer ist, obwohl die stationäre Modellierung mittels des Multiple Reference Frame (MRF)‐Verfahrens ein nicht physikalisch begründbares Geschwindigkeitsfeld in der unmittelbaren Umgebung des Ventilators hervorruft. Die Ursache dafür, dass die stationäre Lösung mittels MRF nicht konvergiert, ist auf die räumliche Begrenzung der rotierenden Zone zurückzuführen, so wie es bei deckenintegrierten Ventilatoren durch das Ventilatorgehäuse der Fall ist. Demgegenüber bei frei im Raum hängenden Ventilatoren die rotierende Zone entsprechend adaptiert und das Konvergenzverhalten verbessert werden kann.

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“…Design of experiments (DOE) and statistical regression techniques are able to explore the relationship and approximate the unknown function with limited samples. Thus, much research has been done on the coupling of CFD and DOE in the design of turbomachines, 2,3 blades, 4 engine, 5,6 and other automobile applications. 7 Song et al 8 developed a torque converter design optimization system, which integrated blade geometry design, CFD simulation, and optimization to simplify the design process for torque converters.…”

Section: Introductionmentioning

confidence: 99%

Design of experiments to investigate blade geometric effects on the hydrodynamic performance of torque converters

Liu

Wei

Yan

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Torque converters are key components in automatic and hydrodynamic transmissions. Power is transmitted through the reaction force of fluid on cascades; thus, the geometry of the blade is essential to torque converter performance. The traditional one-dimensional blade design approach becomes inefficient for modern torque converter design because torque converters are highly coupled turbomachines and the flow is three-dimensional. In the present research, a novel six-parameter blade camberline design was developed to describe the overall shape of the blade. A full two-level factorial design was conducted with computational fluid dynamics (CFD) simulations on each component to determine the sensitivity of design variables and investigate the relationship between design parameters and hydrodynamic performance. The design variables were reduced from 18 to nine after the screening design. A quarter-fractional factorial design was performed on the selected primary design variables to explore the first-order interaction effects between different wheels. Then a response surface was generated for each component to provide a substitution model for further optimization. A series of torque converters with various design parameters were fabricated and tested to validate the important effects determined in the design of experiments (DOE) process. It is found that CFD in combination with DOE is able to precisely capture the correlation between design variables and hydrodynamic performance. A base torque converter was optimized based on the DOE studies and the result was tested. Pronounced improvement in powertrain performance and fuel economy were observed.

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Parametric Study and Optimization of Ceiling Fan Blades for Improved Aerodynamic Performance

Cited by 15 publications

References 18 publications

Design Optimization of Ceiling Fan Blades with Nonlinear Sweep Profile

Design Optimization of Ceiling Fan Blades with Nonlinear Sweep Profile

Comparison of stationary and transient RANS modelling

Design of experiments to investigate blade geometric effects on the hydrodynamic performance of torque converters

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