Performance Assessment of Bladeless Micro-Expanders Using 3D Numerical Simulation

Renuke, Avinash; Traverso, Alberto; Pascenti, Matteo

doi:10.1051/e3sconf/201911303016

Cited by 4 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this section 2-D CFD of the rotor for the 3-kW expander with air is performed. Details about the CFD model set-up may be found in [9]. 4 and Fig.…”

Section: -D Rotor Of 3 Kw Tesla Expander -2d Cfdmentioning

confidence: 99%

An Updated Design Procedure for Tesla Turbines

Renuke,

Traverso,

Kalfas

2023

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

Tesla turbine rotor, a special case of the flow between two corotating disks, has been studied in the past analytically and the performance is discussed both qualitatively and quantitatively. However, there is no systematic design criteria/process given to design the rotor of a Tesla expander in the peer-reviewed literature. Such design procedure, presented in this article, allows researchers and engineers to design and optimise the rotor for a given fluid and design condition (Power, flow and rotational speed). In this article, we present a 0-D design methodology to calculate rotor design parameters such as disk diameters, the gap between disks, the number of disks and the rotational speed of the expander, and efficiency and power estimation. This design procedure is based on the correlations and optimal ranges present in the literature. The 0-D model discussed in this article is a promising design approach to the preliminary design of the Tesla rotor and then further fine-tuning could be done based on the CFD simulations when coupled with the stator. A case study is presented with a 3-kW air bladeless expander prototype in which the rotor is designed using the 0-D model approach and compared with 2D Computational Fluid Dynamics results.

show abstract

“…In this section 2-D CFD of the rotor for the 3-kW expander with air is performed. Details about the CFD model set-up may be found in [9]. 4 and Fig.…”

Section: -D Rotor Of 3 Kw Tesla Expander -2d Cfdmentioning

confidence: 99%

An Updated Design Procedure for Tesla Turbines

Renuke,

Traverso,

Kalfas

2023

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The best efficiency point for M3 turbine obtained from 3D computational fluid dynamics analysis is at design values: 2.4 bar inlet pressure at 30000 rpm [6]. This turbine currently has not been tested at its full capacity and for higher number of nozzles.…”

Section: Turbine M3mentioning

confidence: 99%

Experimental Campaign Tests on a Tesla Micro-Expanders

Renuke

Traverso

Pascenti³

2019

E3S Web Conf.

Self Cite

View full text Add to dashboard Cite

This paper presents the experimental campaign on Tesla turbo expanders carried out at Thermo-chemical Power group (TPG) of University of Genoa, Italy. An experiment system is established using compressed air as a working fluid. A 200 W turbine is tested with rotational speed up to 40000 rpm. Experimental analysis focused mainly on the efficiency features of this expander, showing the impact on performance of different disk gaps, disk thickness, discharge holes, exhaust geometry, as a function of speed and mass flow. An improved version of 3 kW air Tesla turboexpander is built. Preliminary experimental results are discussed along with the effect of number of nozzles on the performance of the turbine.

show abstract

“…The most recent works on the Tesla turbine deal with the performance assessment, both through experimental campaigns [27,28], CFD analysis [29] or through the investigation of the possible utilization as heat recovery system from engine coolant waste heat [30].…”

Section: Introductionmentioning

confidence: 99%