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RISBlade Excitation Alleviation of a Nozzleless Radial Turbine by Casing Treatment Based on Reduced-Order Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High cycle fatigue (HCF) is the most common form of blade failure in nozzleless radial turbines. Current studies relating to blade vibration reduction focus on redesign of blade and volute geometries. These methods have ...
Radial Turbine Rotor Response to Pulsating Inlet Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The performance of automotive turbocharger turbines has long been realized to be quite different under pulsating flow conditions compared to that under the equivalent steady and quasisteady conditions on which the conventional ...
One-Dimensional Modeling for Pulsed Flow Twin-Entry Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: One-dimensional (1D) modeling is critical for turbomachinery unsteady performance prediction and system response assessment of internal combustion engines. This paper uses a novel 1D modeling (TURBODYNA) and proposes two ...
Stability Improvement of High Pressure Ratio Turbocharger Centrifugal Compressor by Asymmetrical Flow Control—Part II: Nonaxisymmetrical Self Recirculation Casing Treatment
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This is part II of a twopart paper involving the development of an asymmetrical flow control method to widen the operating range of a turbocharger centrifugal compressor with highpressure ratio. A nonaxisymmetrical ...
TURBODYNA: A Generic One-Dimensional Dynamic Simulator for Radial Turbomachinery
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The turbocharged piston-driven engines are widely used in high altitude long endurance unmanned aerial vehicles (HALE UAVs). Repeated actions of engine pistons and valves give rise to engine pulsations resulting in intensive ...
Unsteady Gas Dynamics of Radial Turbine Volutes Under Pressure Pulsations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Turbocharging is the key technique to improve engine-specific power and reduce CO2 emissions of a piston-driven engine. Repeated actions of engine pistons and valves give rise to engine pulsations resulting in intensive ...
Modeling of Dynamic Response of a Radial Turbine to Pulsatile Incoming Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The unsteady response of a turbine exposed to pulsatile incoming flow is studied via the analytical model in this article. First, the response of output torque of the turbine to pulsatile condition is theoretically studied ...
Compressor Stability at Pulsating Condition Via Gas Dynamics Responses Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The compressor is operated at unsteady exit conditions in many scenarios such as the instability of combustion in gas turbine and denotation engine. The aerodynamic stability of the compressor is inevitably influenced by ...
Aerodynamic Stability Enhancement of a SCO2 Centrifugal Compressor by Riblets of the Shroud
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Aerodynamic stability enhancement is crucial for the stable operation of supercritical carbon dioxide (SCO2) centrifugal compressors. This paper investigates the mechanism of aerodynamic instability of shrouded SCO2 ...
Stability Improvement of High Pressure Ratio Turbocharger Centrifugal Compressor by Asymmetric Flow Control—Part I: Non Axisymmetrical Flow in Centrifugal Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This is Part I of a twopart paper documenting the development of a novel asymmetric flow control method to improve the stability of a highpressureratio turbocharger centrifugal compressor. Part I focuses on the nonaxisymmetrical ...