Experimental studies on the effect of obstacle upstream of a Savonius wind turbine

Putri, Nabila Prastiya; Yuwono, Triyogi; Rustam, Jasmi; Purwanto, Prayogi; Bangga, Galih

doi:10.1007/s42452-019-1253-2

Cited by 23 publications

(11 citation statements)

References 24 publications

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“…Putri et al experimental studied to assess the capability of an obstacle located upstream of a Savonius wind turbine to improve the power generated by the rotor. They stated that the obstacle and the Reynolds number have a small influence on the rotational speed of the loaded turbine (Putri et al, 2019). Akansu et al (2017) numerically investigated on a blade fixed pitch VAWT using NACA0021, NACA0015, NACA5520, and Clark-Y airfoils as a blade profile to assess its performance.…”

Section: Introductionmentioning

confidence: 99%

“…They stated that Savonius wind turbines is applicable to helical Savonius wind turbines for small blockage ratios ranging from 3% to 8.3% (Jeon et al, 2015). Putri et al (2019) tested the performance of a small Savonius vertical axis wind turbine equipped with an upstream obstacle to guide the wind direction at 30000 and 90000 Reynolds number. They observed that that the mechanical torque and power generated by the rotor have been strongly affected by the obstacle and the Reynolds number has no significant impact on the rotor performance.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance analysis of Savonius wind turbines in different models

et al. 2022

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This study presents experimental results of power performance characterizations for of 12 different Savonius turbine blades. There are three different models and the numbers of each blade types have been selected as 2, 3, 4, and 5. Three different blade types are drawn in a CAD program and all blade models are produced from 3D printer. The experiments are carried out in the subsonic wind tunnel laboratory of the Faculty of Aeronautics and Astronautics at Erciyes University. The wind tunnel has 15 kW motor power to produce wind flow. Test zone inlet and outlet section is 0.57 m × 0.57 m and 0.59 m × 0.59 m respectively. Shaft to shaft type torque meter is mounted between turbine and electric motor. Measurements have been made at wind speeds between 1 and 30 m/s. The performance values of each turbine have been measured. While the 3-bladed turbine showed the highest power coefficient values in the whole study, the maximum value was obtained from the modified helical turbine type.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance analysis of Savonius wind turbines in different models

et al. 2022

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“…Nabila et. al [4] using wind tunnel to investigate the effect of the upstream obstacle as wind deflector or guider on the Savonius wind turbine. By using the opening angle of obstacle have strongly to increase the rotor power and torque where the maximum performance at angle is 40 degrees.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on Savonius Wind Turbine with Unidirectional Rotor House for High Speed Application

Radzi¹

2020

IJETER

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Air Wheel Generator (AWG) is known as a vertical axis wind turbine with generator for renewable energy have been developed for low and high speed application. Recently, the various shapes of Savonius housing have been studied to improve its rotational speed and coefficient of rotor power. In this paper, Savonius wind turbine with unidirectional Rotor House (RH) for high speed application has been experimental studies to increase the revolution per minute (RPM) of the alternator and charging capability. The experiment on the AWG test stand was set up for different Blade Thickness (BT), t=0.9 mm, 1.2 mm, 1.5 mm, and 2.0 mm where BT that has higher RPM will be the best rotor. The total of 4 test runs of passenger car installed with AWG was conducted using the best BT of the rotor. From the test run conducted on the highway road, the overall functionality of rotor and output voltage have been observed. The apparatus test stand requires verification with actual test run on passenger. On the other word, only the best BT with high RPM will be continued for further test stand for charging capability. Comparison of test stand and test run on passenger car show the blade with a thickness of 0.9mm as the optimum blade thickness. AWG with Blade Guiders had the average speed rated of the alternator is 600 RPM (V belt) and 400 RPM (V Ribbed belt) as a switch is on for air speeds varies from 22.22 to 32.8 m/s. The standard Permanent Magnet Direct Current (PMDC) generator with the same average speed rate was proposed as good combinations for AWG with uni-directional RH. Hence, the conversion of car alternator as the standard permanent magnet that has water proof that may be used also with wind nozzle and lighter rotor material to increase the torque and power of the rotor in the future.

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“…The development of the wind energy industry helps to decrease the dependency on fossil fuel. As a result, many researchers have studied different aspects of wind turbines numerically and experimentally [1][2][3]. Since wind energy sources, as well as suitable sites (both onshore and offshore locations) for installing wind turbines, are limited, wind turbines with higher efficiency are needed.…”

Section: Introductionmentioning

confidence: 99%

Prediction of aeroacoustic performance of counter-rotating wind turbine by changing the rotational speed of front rotor

2019

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This study aims to investigate the aerodynamic and aeroacoustic performance of a counter-rotating wind turbine (CRWT) to define the effect of rotational wind speed of the front rotor on the sound pressure level of CRWT, using CFD simulation. For this purpose, NREL Phase VI wind turbine was considered as the single rotor, and validation of aerodynamic and aeroacoustic simulation has been carried out for the solver. Then, 3D simulation has been applied on single rotor and counter-rotating wind turbines to scrutinize the acoustic level of CRWT by changing the rotational speed of the front rotor. The unsteady flow simulation was carried out with the realizable k-ε Reynolds-averaged Navier-Stokes turbulence model, and the calculated flow field data were utilized using Ffowcs Williams-Hawkings model for predicting the acoustic level at receiver location, defined based on the IEC61400-11 standard. The results show that increasing the rotational wind speed of the upstream rotor leads to augmenting the noise emitted from CRWT. On the other hand, for tip speed ratios (TSR) ranging from 6 to 12, with increasing the front rotor RPM, the power coefficient of CRWT enhances, while for the TSR more than 12, an inverse behavior has been observed and power coefficient declines along with increasing front rotor's speed of revolution.

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Experimental studies on the effect of obstacle upstream of a Savonius wind turbine

Cited by 23 publications

References 24 publications

Performance analysis of Savonius wind turbines in different models

Performance analysis of Savonius wind turbines in different models

Experimental Studies on Savonius Wind Turbine with Unidirectional Rotor House for High Speed Application

Prediction of aeroacoustic performance of counter-rotating wind turbine by changing the rotational speed of front rotor

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