Performance prediction of a nozzled and nozzleless mixed-flow turbine in steady conditions

Romagnoli, Alessandro; Martinez-Botas, Ricardo

doi:10.1016/j.ijmecsci.2011.05.003

Cited by 64 publications

(53 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The impeller blade shape is made with Polynomial Bezier curves giving different control points. More detailed geometrical parameters of the present rotor are available in the litterature [4,7]. Figure 1 shows the developed three-dimensional model of the full mixed flow turbine stage.…”

Section: Turbine Geometrymentioning

confidence: 99%

“…In fact, the distribution of the total to static isentropic efficiency is calculated as a function of the mass flow parameter. Figure 3 presents the superposition of the distribution of the computed total to static isentropic efficiency and the experimental data collected by Romagnoli [7] for a rotationnel speed of 59783.4 rpm. A good agreement has been observed between the experimental and numerical results.…”

Section: Numerical Validationmentioning

confidence: 99%

“…In various anterior works, A one-dimensional code including a mean line model has been used to predict the turbine overall performance [5,6]. Romagnoli and Martinez-Botas [7] developed a meanline model including several loss models to predict the nozzleless and nozzled mixed flow turbines performances under different rotational speeds. Their model showed a good agreement with the test data.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of Rotor Speed on Mixed Flow Turbine Performance

Ketata¹,

Driss²

2017

AJME

View full text Add to dashboard Cite

The radial turbine which is an important component of a turbocharger is used in automotive applications in order to enhance internal combustion engines performance. In the recent years, the radial turbine is commonly replaced instead of a mixed flow one. In fact, the mixed flow turbine yields to better aerodynamic performance at lower isentropic velocity ratio compared to the radial configuration. This present paper shows our numerical model under various steady conditions in purpose to understand the effect of the rotational speed on the turbine performance. Numerical simulations are conducted by solving the Reynolds averaged Navier Stokes equations using the CFX 17.0 package including a finite volume method for the discretization. To close these equations, the standard k-ε turbulence model is chosen. Our numerical model succeeds to predict the turbine performance and the swallowing capacity with an acceptable accuracy. Besides, the peak efficiency and the choking mass flow are computed for different operating conditions. Equally, the turbine reaction degree and power are given for each studied rotational speed. Then, the distribution of the total loss within the turbine is obtained numerically at different operating conditions.

show abstract

Section: Turbine Geometrymentioning

confidence: 99%

Section: Numerical Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of Rotor Speed on Mixed Flow Turbine Performance

Ketata¹,

Driss²

2017

AJME

View full text Add to dashboard Cite

show abstract

“…In that work, an automotive radial turbine was simulated with straight ducts attached to its inlet and outlet, behaving similarly to a turbine in a turbocharger gas stand. The different sections considered in the computational domain are described in Table 1: The simulated boundary conditions were of constant pressure at the domain outlet and sinusoidal in total pressure with 1 The code developed by this team is available under a copyleft license at http://www.openwam.org for peer-review by other researchers Section number Description 0 Domain inlet 1 Turbine inlet 2 Volute outlet -stator inlet 3 Stator outlet -rotor inlet 4…”

Section: Model Descriptionmentioning

confidence: 99%

“…Some authors have devoted great efforts in the last decade to the research and development of codes that not only simulates the turbocharger in a quasi-steady manner, but also extrapolate turbine maps [1]. Payri et al [2] presented a physically-based methodology to extrapolate turbine maps.…”

Section: Introductionmentioning

confidence: 99%

Development and validation of a radial variable geometry turbine model for transient pulsating flow applications

Galindo

Tiseira

Fajardo

et al. 2014

Energy Conversion and Management

View full text Add to dashboard Cite

Elsevier Galindo, J.; Tiseira Izaguirre, AO.; Fajardo, P.; García-Cuevas González, LM. (2014). Development and validation of a radial variable geometry turbine model for transient pulsating flow applications. Energy AbstractThis paper presents the development and validation of a one-dimensional radial turbine model able to be used in automotive turbocharger simulations. The model has been validated using results from a numerical 3D CFD simulation of stationary and pulsating flow in a variable geometry radial turbine. As the CFD analysis showed, the main non-quasi-steady behavior of the turbine is due to the volute geometry, so special care was taken in order to properly model it while maintaining low computational costs. The flow in the volute has been decomposed in its radial and azimuthal direction. The azimuthal flow corresponds to the flow moving along the volute, while the radial flow is computed by coupling its flow with a stator model. Although the stator caused fewer accumulation effects than the volute, a small accumulation model has been used for it, which also allows to compute the evolution of the flow inside the turbine with lower costs. The flow in the moving rotor can be considered quasi-steady, so a zero-dimensional model for the rotor has been developed. Several losses models where implemented for both the stator and the rotor. The results show good agreement with the CFD computations.

show abstract

Numerical Investigation for a Vanned Mixed Flow Turbine Volute Under Steady Conditions

Ketata

Driss

2018

CFD Techniques and Energy Applications

View full text Add to dashboard Cite

Performance prediction of a nozzled and nozzleless mixed-flow turbine in steady conditions

Cited by 64 publications

References 5 publications

Influence of Rotor Speed on Mixed Flow Turbine Performance

Influence of Rotor Speed on Mixed Flow Turbine Performance

Development and validation of a radial variable geometry turbine model for transient pulsating flow applications

Numerical Investigation for a Vanned Mixed Flow Turbine Volute Under Steady Conditions

Contact Info

Product

Resources

About