The Effect of the Width and Number of Gaps on the Characteristics of Swirl Flow Induced Naturally inside Split Channel Using Hot Air Inlet

Atresh, Safia R. Al; Sharifian, Ahmad; Wandel, Andrew P.

doi:10.7763/ijmmm.2014.v2.153

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…The strength of swirling flow depends on an optimum ratio of channel inlet to channel diameter [29]. Like the split channel geometries for fire whirl or swirling flow, where this ratio is usually around half [30], SST rotor also shows the same behaviour giving higher power coefficient at 16 mm inlet diameter due to higher strength of flow. Power coefficients reached maximum at around 0.60 blade tip speed ratio for 16 mm and 9 mm diameter whereas that of around 0.55 for 36 mm and 25 mm.…”

Section: Effect Of Hot Air Inlet Diametermentioning

confidence: 99%

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Effects of flow parameters on the performance of vertical axis swirling type Savonius wind turbine

Al-Faruk

Sharifian²

2015

Int. J. Automot. Mech. Eng.

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Wind tunnel experiments were carried out on a geometrically optimal swirling Savonius turbine by varying flow parameters to determine their effects on power and torque coefficients. The optimum geometrical configuration used in this experiment was adopted from an earlier study that features 0.20 blade overlap ratio, 195° blade arc angle, and 1.06 rotor aspect ratio of a 320 mm diameter rotor with closed top end plate. The parameters considered in this experiment are the hot air temperature, hot air mass flow rate, hot air inlet diameter of swirl chamber, and the free-stream wind velocity. The results indicate that higher hot air temperature and hot air mass flow rate enhance the performance of the turbine while power coefficient reached maximum at 16 mm diameter of hot air inlet. Tests on the optimum geometry at five wind velocities revealed that power coefficients are higher in higher wind velocities, which suggests that swirling flow becomes stronger with the increase of wind velocity.

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Section: Effect Of Hot Air Inlet Diametermentioning

confidence: 99%

“…This suggests that higher angular velocity of rotor or wind velocity is favourable for the generation of strong swirling flow. Swirling strength depends on small slit width in stationary channels [30], and on larger angular speed in rotating fire whirl generator [31]. Reynold's Number…”

Section: Effect Of Hot Air Inlet Diametermentioning

confidence: 99%

Effects of flow parameters on the performance of vertical axis swirling type Savonius wind turbine

Al-Faruk

Sharifian²

2015

Int. J. Automot. Mech. Eng.

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“…They proposed the hot air sourced from either solar thermal system or industrial waste heat as the heat source for the split channel. Split channels are capable of inducing swirling flow using hot air plume at the bottom of the channel [8]. An increase in rotational speed and power coefficient of the SST compared to conventional Savonius turbine was reported [7].…”

Section: Introductionmentioning

confidence: 99%

Flow Field and Performance Study of Vertical Axis Savonius Type SST Wind Turbine

Al-Faruk

Sharifian

2017

Energy Procedia

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It has been suggested that waste heats or naturally available heat sources can be utilized to produce swirling flow by a design similar to that of split channels which is currently used to initiate fire whirls in laboratories. A new hybrid power system has been proposed combining the conventional Savonius wind turbine and split channel mechanisms. Previous computational and experimental works indicate a performance improvement in the new hybrid design (named as swirling Savonius turbine, SST) compared to the conventional Savonius turbine. However, the lack of detailed descriptions of the flow field around the swirling Savonius turbine inhibits complete understanding of performance of the hybrid power system. The aim of this study is to numerically explore the three-dimensional unsteady flow around the rotor, and develop a simulation method for predicting their aerodynamic performance using control volume based CFD package of ANSYS CFX. Sliding mesh feature of CFX allowed to solve the motion of the moving blades. Numerical simulations results of SST were compared with the experimental results. A discussion on the detailed flow field characteristics, including velocity vector, velocity streamlines, pressure distribution, vorticity analysis, and examination of power and torque coefficients behavior are presented.

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The Effect of the Width and Number of Gaps on the Characteristics of Swirl Flow Induced Naturally inside Split Channel Using Hot Air Inlet

Cited by 2 publications

References 9 publications

Effects of flow parameters on the performance of vertical axis swirling type Savonius wind turbine

Effects of flow parameters on the performance of vertical axis swirling type Savonius wind turbine

Flow Field and Performance Study of Vertical Axis Savonius Type SST Wind Turbine

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