Search Results - "Inhestern, Lukas Benjamin"
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Numerical Analysis of the Effects of Different Rotor Tip Gaps in a Radial Turbine Operating at High Pressure Ratios Reaching Choked Flow
Published in Energies (Basel) (01-12-2022)“…To operate, radial turbines used in turbochargers require a minimum tip gap between the rotor blades and the stationary wall casing (shroud). This gap…”
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Design and Numerical Analysis of Flow Characteristics in a Scaled Volute and Vaned Nozzle of Radial Turbocharger Turbines
Published in Energies (Basel) (01-06-2020)“…Over the past few decades, the aerodynamic improvements of turbocharger turbines contributed significantly to the overall efficiency augmentation and the…”
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An innovative losses model for efficiency map fitting of vaneless and variable vaned radial turbines extrapolating towards extreme off-design conditions
Published in Energy (Oxford) (01-08-2019)“…Pulsating flow in automotive turbocharger turbines makes it necessary to know performance characteristics in difficult to measure off-design conditions…”
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Turbocharger turbine rotor tip leakage loss and mass flow model valid up to extreme off-design conditions with high blade to jet speed ratio
Published in Energy (Oxford) (15-03-2018)“…Due to the power consumption restriction of the turbocharger compressor, common turbine maps are rather narrow. To extrapolate them, reliable physical…”
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Radial turbine performance measurement under extreme off-design conditions
Published in Energy (Oxford) (15-04-2017)“…During automotive urban driving conditions and future homologation cycles, automotive radial turbines experience transient conditions, whereby the same operate…”
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Contribution to tip leakage loss modeling in radial turbines based on 3D flow analysis and 1D characterization
Published in The International journal of heat and fluid flow (01-08-2019)“…•The influence of the tip gap size on the tip leakage flow was analyzed by means of CFD.•Leading numbers for the tip leakage loss generation like flow momentum…”
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Numerical Analysis of the Effects of Grooved Stator Vanes in a Radial Turbine Operating at High Pressure Ratios Reaching Choked Flow
Published in Aerospace (01-04-2023)“…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,…”
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Flow irreversibility and heat transfer effects on turbine efficiency
Published in Applied energy (01-01-2024)Get full text
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Reduced-order-modeling of the transient starting in supersonic passages
Published in Aerospace science and technology (01-08-2023)“…Characterizing the time scales of starting in supersonic passages is essential for future aerospace propulsion systems, such as supersonic intakes, Rotating…”
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Reduced-order-modeling of the transient starting in supersonic passages
Published in Aerospace science and technology (01-08-2023)“…Not provided…”
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Choking dynamic of highly swirled flow in variable nozzle radial turbines
Published in Aerospace science and technology (01-03-2022)“…This paper presents the results of a computational investigation of the aerodynamic choking mechanism in a variable geometry turbine, which is widely used in…”
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