The fluid dynamics of the rotating flow in a Tesla disc turbine

Guha, Ayan; Sengupta, Sayantan

doi:10.1016/j.euromechflu.2012.08.001

Cited by 54 publications

(49 citation statements)

References 42 publications

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“…A one-dimensional analysis method of flow field in the disc channel is proposed with some hypotheses, and the model agrees well with previous experimental performance data [18]. Sengupta and Guha formulated a mathematical theory by simplifying the Navier-Stokes equations using a magnitude analysis method, which can assess the turbine performance [19][20][21]. Talluri et al developed a new method for designing of a Tesla turbine for Organic Rankine Cycle (ORC) applications, in which almost all losses are considered using real gas physical properties [22].…”

Section: Introductionsupporting

confidence: 70%

Disc Thickness and Spacing Distance Impacts on Flow Characteristics of Multichannel Tesla Turbines

Deng

Jiang

et al. 2018

Energies

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Tesla turbines are a kind of unconventional bladeless turbines, which utilize the viscosity of working fluid to rotate the rotor and realize energy conversion. They offer an attractive substitution for small and micro conventional bladed turbines due to two major advantages. In this study, the effects of two influential geometrical parameters, disc thickness and disc spacing distance, on the aerodynamic performance and flow characteristics for two kinds of multichannel Tesla turbines (one-to-one turbine and one-to-many turbine) were investigated and analyzed numerically. The results show that, with increasing disc thickness, the isentropic efficiency of the one-to-one turbine decreases a little and that of the one-to-many turbine reduces significantly. For example, for turbine cases with 0.5 mm disc spacing distance, the former drops less than 7% and the latter decreases by about 45% of their original values as disc thickness increases from 1 mm to 2 mm. With increasing disc spacing distance, the isentropic efficiency of both kinds of turbines increases first and then decreases, and an optimal value and a high efficiency range exist to make the isentropic efficiency reach its maximum and maintain at a high level, respectively. The optimal disc spacing distance for the one-to-one turbine is less than that for the one-to-many turbine (0.5 mm and 1 mm, respectively, for turbine cases with disc thickness of 1 mm). To sum up, for designing a multichannel Tesla turbine, the disc spacing distance should be among its high efficiency range, and the determination of disc thickness should be balanced between its impacts on the aerodynamic performance and mechanical stress.

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Section: Introductionsupporting

confidence: 70%

Disc Thickness and Spacing Distance Impacts on Flow Characteristics of Multichannel Tesla Turbines

Deng

Jiang

et al. 2018

Energies

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“…The analytical model presented in this Section was developed by Guha and Sengupta (2013). Their motivation was to propose a three-dimensional analytical model describing velocity and pressure fields.…”

Section: Analytical Modelmentioning

confidence: 99%

“…The principle of operation is based on viscosity of the fluid and adhesive forces between the disc surface and fluid particles. The working medium flows tangentially into the rotor at the outer radius and is subjected to multiple forces: inertial, centrifugal, viscous and Coriolis (Guha and Sengupta, 2013). Shear stresses coming from fluid viscosity and from flow turbulence generate the torque, which makes the discs rotate.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, 6 parameters crucial for turbine operation were determined: inlet pressure, inlet velocity, inlet temperature, disc tip Mach number, Reynolds number and radius of the rotor. Guha and Sengupta (2013) developed an analytical model which took into account centrifugal, inertial, Coriolis and viscous forces. Moreover, they proved that the turbine could work even with a negative relative fluid tangential velocity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Comparison of methods for the determination of Tesla turbine performance

Rusin¹,

Wróblewski²,

Strozik³

2019

Journal of Theoretical and Applied Mechanics

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A numerical and experimental investigation of the Tesla turbine is presented in the paper. The experiment is conducted for various inlet pressure and load. The roughness of the rotor disc is determined as it is a key factor to obtain high turbine efficiency and power. The numerical investigations are performed for the same conditions as in the experiment. The computational results are compared with the analytical model. Comparison of performance characteristics show a relatively good agreement between the experiment and CFD. The analytical model overestimates distributions of pressure and circumferential velocities, although the predicted power is on the similar level as in the experiment and CFD.

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“…In these cases the upper process temperature level equals 773 to 873 K while the ambient temperature level (Table I., II.) [7][8][9][10][11][12][13][14][15][16][17][18]. Although from the physical point of view ethane, hexane and hexamethoxydisiloxane would be favourable, the specific type of a friction expander is so robust and reliable that saturated water steam was preferred.…”

Section: Introductionmentioning

confidence: 99%

Friction Expander for the Generation of Electricity (FEGE)

Kölling¹,

Lisker²,

Hellwig³

et al. 2015

REPQJ

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Abstract. At present and in future the necessity of generating electricity using renewable resources globally is most important and clearly evident. Depending on how the scenarios are designed and disregarding fossil resources the contributions of renewable energy sources have to be increased by a factor of four to six as far as it concerns the installed capacity and the amount of electricity generated. The corresponding annual investment costs amount some hundred billion US-$ and the CO 2 emission reduction equals one Gt. In any case heat to electricity conversion systems based on biomass, geothermal and process heat recovery are expected to provide significant contributions to this objective. Besides several others the conversion technology of a Rankine Cycle Process is most suitable over a wide range of capacities notwithstanding the possibilities to applicate working fluids of non-organic or organic character. Particularly for the heat recovery from the exhaust gas of biogas operated internal combustion engines the type of a newly developed friction expander was designed, constructed, built and evaluated. Based on preceding theoretical and numerical calculations as well as constructional and experimental studies using hexane and hexamethoxydisiloxane in the project reported here saturated water steam was used as working fluid. During the experiments carried out in a special test facility the electric power of the system amounted 1.4 kW representing two thirds of the concepttual design.

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The fluid dynamics of the rotating flow in a Tesla disc turbine

Cited by 54 publications

References 42 publications

Disc Thickness and Spacing Distance Impacts on Flow Characteristics of Multichannel Tesla Turbines

Disc Thickness and Spacing Distance Impacts on Flow Characteristics of Multichannel Tesla Turbines

Comparison of methods for the determination of Tesla turbine performance

Friction Expander for the Generation of Electricity (FEGE)

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