Turbocharger turbine rotor tip leakage loss and mass flow model valid up to extreme off-design conditions with high blade to jet speed ratio
Due to the power consumption restriction of the turbocharger compressor, common turbine
maps are rather narrow. To extrapolate them, reliable physical submodels are needed that …
maps are rather narrow. To extrapolate them, reliable physical submodels are needed that …
An innovative losses model for efficiency map fitting of vaneless and variable vaned radial turbines extrapolating towards extreme off-design conditions
Pulsating flow in automotive turbocharger turbines makes it necessary to know performance
characteristics in difficult to measure off-design conditions. Physically based extrapolation …
characteristics in difficult to measure off-design conditions. Physically based extrapolation …
Contribution to tip leakage loss modeling in radial turbines based on 3D flow analysis and 1D characterization
The characterization of tip leakage flow plays an important role for one-dimensional loss
modeling and design in radial turbine research. Tip leakage losses can be expressed as …
modeling and design in radial turbine research. Tip leakage losses can be expressed as …
Numerical evaluation in a scaled rotor-less nozzle vaned radial turbine model under variable geometry conditions
The widespread trend of pursuing higher efficiencies in radial turbochargers led to the
prompting of this work. A 3D-printed model of the static parts of a radial variable geometry …
prompting of this work. A 3D-printed model of the static parts of a radial variable geometry …
[HTML][HTML] Choking dynamic of highly swirled flow in variable nozzle radial turbines
This paper presents the results of a computational investigation of the aerodynamic choking
mechanism in a variable geometry turbine, which is widely used in automotive …
mechanism in a variable geometry turbine, which is widely used in automotive …
Numerical analysis of the effects of different rotor tip gaps in a radial turbine operating at high pressure ratios reaching choked flow
To operate, radial turbines used in turbochargers require a minimum tip gap between the
rotor blades and the stationary wall casing (shroud). This gap generates leakage flow driven …
rotor blades and the stationary wall casing (shroud). This gap generates leakage flow driven …
Development of choked flow in variable nozzle radial turbines
A Tiseira, LM García-Cuevas… - … Journal of Engine …, 2022 - journals.sagepub.com
In commonly applied one-dimensional choking models for radial turbines, choked flow is
assumed to appear in the geometrical throat of each stator and rotor. Coupled and complex …
assumed to appear in the geometrical throat of each stator and rotor. Coupled and complex …
Design and numerical analysis of flow characteristics in a scaled volute and vaned nozzle of radial turbocharger turbines
Over the past few decades, the aerodynamic improvements of turbocharger turbines
contributed significantly to the overall efficiency augmentation and the advancements in …
contributed significantly to the overall efficiency augmentation and the advancements in …
Numerical Analysis of the Effects of Grooved Stator Vanes in a Radial Turbine Operating at High Pressure Ratios Reaching Choked Flow
The flow through the stator vanes of a variable geometry turbocharger turbine can reach
supersonic conditions and generates a shock wave on the stator vanes, which has a …
supersonic conditions and generates a shock wave on the stator vanes, which has a …
Numerical Simulation of a Radial Turbine at Off-Design Conditions in Presence of Choked Flow
A Tiseira, LM García-Cuevas… - … Expo: Power for …, 2020 - asmedigitalcollection.asme.org
In the application of turbocharging and organic Rankine cycles (ORCs) the radial turbine
can operate at high pressure ratio leading to the presence of choking inside the turbine …
can operate at high pressure ratio leading to the presence of choking inside the turbine …