Fluid structure interaction analysis of the operating Savonius wind turbine

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a highly infectious disease that emerged in December of 2019, threatening human health and leading to global public health crises. Airborne transmission via droplets and aerosol has been recently recognized as one of the infection modes for the SARS-CoV-2 virus. Hospitals have deployed/incorporated indoor air purifiers with the hope to minimize the transmission risk of SARS-CoV-2 virus. Nevertheless, the effectiveness of the indoor air purifier in reducing the transmission risk remained unknown. This study uses computational fluid dynamics to model the dispersion of the aerosol particles exhaled from the patient under the influence of an air conditioner, exhaust fans and air purifier. The numerical model showed that airflow from the diffusers, exhaust fans and placement of the air purifier significantly influenced the dispersion pattern of the aerosol particles in the common ward. Multiple air purifiers placed at 1 meter above the floor and next to a patient can increase the total efficiency from 37.14 to 59.91% for weak exhalation and from 36.44% to 48.81% for medium exhalation. No aerosol particles flew out from the door for weak and medium exhalation when multiple air purifiers were deployed in the common ward. Location and matching the clean air delivery rate with the size of the room are the important factors that affect the performance of the air purifier.

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“…The conservation of momentum equation is written as in Eq. ( 2) (Ashgriz and Mostaghimi, 2002;Marzec et al, 2021;Saw et al, 2018).…”

Section: Numerical Proceduresmentioning

confidence: 99%

“…The energy balanced equation is defined by Eq. ( 3) (Ashgriz and Mostaghimi, 2002;Marzec et al, 2021;Saw et al, 2018):…”

Section: Numerical Proceduresmentioning

confidence: 99%

The Myth of Air Purifier in Mitigating the Transmission Risk of SARS-CoV-2 Virus

Saw

Leo

Lin

et al. 2022

Aerosol Air Qual. Res.

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“…The Reynolds Averaged Navier Stokes (RANS) pressure solver of Ansys Fluent was utilized. The k-ω SST (Shear Stress Transport) turbulence model of Menter [8] was employed, as it is commonly used in Savonius wind turbine simulations [9][10][11][12]. The air properties were defined for standard atmospheric conditions (15ºC and 1 atm).…”

Section: 𝑇𝑆𝑅 = 𝜔𝐷 2𝑈mentioning

confidence: 99%

Influence of Tip Speed Ratio on the efficiency of Savonius wind turbine with deformable blades

Marchewka

Sobczak

Reorowicz

et al. 2022

J. Phys.: Conf. Ser.

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Improving machines efficiency and searching for their new applications are the main topics in the development of the renewable energy industry. In the case of Savonius type wind turbines, the works aim at the improvement of aerodynamic performance. The CFD simulations of a turbine equipped with deformable blades showed a significant positive impact of this enhancement on the machine aerodynamic efficiency. Previously, the investigation was carried out for a TSR (Tip Speed Ratio) equal to 0.8, typically recognized as the point of maximal efficiency for conventional Savonius wind turbines with rigid blades. However, the continuously altering shape of blades during their rotation can influence the optimal TSR. Therefore, the efficiency of the deformable blade turbine was investigated in a wide range of TSR. In this paper, the previously developed quasi-2D model with a two-way Fluid-Structure Interaction method was employed to obtain turbine efficiency characteristics as a function of TSR. The maximum power coefficient Cp was achieved at TSR = 0.9. Obtained characteristic was compared with data for a conventional rigid blades turbine, gathered with a comparable sliding mesh model.

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“…According to the above description, additional studies and testing in the hopes of boosting the performance of the Savonius turbine in the combination of the concave and convex side models is required with a basic and low-cost wind energy conversion device. The enhancement of Savonius turbine performance as an alternative energy source [32][33][34][35][36] , such as water pumping and irrigation in Indonesia farms, is one possibility.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Simulation Investigation on Savonius Turbine: Influence of Inlet-Outlet Ratio Using a Modified Blade Shaped to Improve Performance

Herlambang¹,

Supriyo²,

Prasetiyo³

et al. 2022

Evergreen

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This study aims to obtain the characteristics of the Savonius turbine based on the ratio of the inlet and outlet blades by using a modified blade shape and analyzing numerical simulations of the speed and pressure around the turbine blades. The use of Savonius turbines can be a solution because it produces large torque even if installed at low wind speed. Savonius blade modification into a double blade with a combination of type L and U aims to capture greater wind energy while generating greater electrical power. The study was tested at speeds of 3, 5, 7, and 9 m/s with variable differences in the side in and out of the turbine. However, what is presented in this article is the test parameters at a wind speed of 7 m/s. The test obtained data in the form of torque, generator speed, voltage, and current produced by the turbine. Once analyzed it can be concluded that the best performance is produced by a single blade rotor, then the rotor is 1:1, 2:1, and the lowest performance is obtained from the 3:1 rotor. The results of the study indicate that the Savonius turbine has optimum performance on a single blade rotor model at 189 rpm, the power coefficient value is 0.039, turbine power is 80.26 W, generator power is 3.08, and system efficiency is 3.84%.

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Fluid structure interaction analysis of the operating Savonius wind turbine

Cited by 24 publications

References 28 publications

The Myth of Air Purifier in Mitigating the Transmission Risk of SARS-CoV-2 Virus

The Myth of Air Purifier in Mitigating the Transmission Risk of SARS-CoV-2 Virus

Influence of Tip Speed Ratio on the efficiency of Savonius wind turbine with deformable blades

Experimental and Simulation Investigation on Savonius Turbine: Influence of Inlet-Outlet Ratio Using a Modified Blade Shaped to Improve Performance

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