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RISExperimental and Numerical Similitude Study Using a Novel Turbocompressor Test Facility Operating With Helium–Neon Gas Mixtures
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel turbocompressor test facility has been designed for helium–neon gas mixtures, and its specific features are presented. To account for the heat transfer originating from the motor coolant, a surrogate model has been ...
Second Law Analysis of Condensing Steam Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A numerical second law analysis is performed to determine the entropy production due to irreversibilities in condensing steam flows. In the present work, the classical approach to calculate entropy production rates in ...
An Extension of the Classical Subset of Nominal Modes Method for the Model Order Reduction of Gyroscopic Systems
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In the structural dynamics design process of turbomachines, Coriolis effects are usually neglected. This assumption holds true if no pronounced interaction between the shaft and disk occurs or if the radial blade displacements ...
Numerical Investigations of an Axial Exhaust Diffuser Coupling the Last Stage of a Generic Gas Turbine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: It is well known that the last stage of a turbine and the subsequent diffuser should be viewed at and designed as a coupled system rather than as single standalone components. The turbine outlet flow imposes the inlet ...
A New Mistuning Identification Method Based on the Subset of Nominal System Modes Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The mistuning problem of quasi-periodic structures has been the subject of numerous scientific investigations for more than 50 years. Researchers developed reduced-order models to reduce the computational costs of mistuning ...
Investigation of the Flow Field and the Pressure Recovery in a Gas Turbine Exhaust Diffuser at Design, Part-Load, and Over-Load Conditions
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The performance of axial diffusers installed downstream of heavy duty gas turbines is mainly affected by the turbine load. Thereby the outflow varies in Mach number, total pressure distribution, swirl and its tip leakage ...
Performance and Losses Analysis for Radial Turbine Featuring a Multi-Channel Casing Design
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A novel control technique for radial turbines is under investigation for providing turbine performance controllability, especially in turbocharger applications. This technique is based on replacing the traditional spiral ...
Multi-Objective Numerical Optimization of Radial Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The growing demand of high flexibility and wide operating ranges of radial turbines in turbocharger applications necessitates new methods in the turbomachinery design process. Often, design criteria such as high performance ...
A New Axial Compressor Test Facility for the Investigation of Aerodynamic Damping Featuring an Electromagnetic Excitation System
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Aerodynamic damping simulations involving detailed computational fluid dynamics (CFD) models are nowadays an integral part of turbomachinery design processes, thanks to advancements made in simulation tools and in computer ...
A Remotely Operated Aeroelastically Unstable Low Pressure Turbine Cascade for Turbomachinery Aeromechanics Education and Training—Remote Flutter Lab
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The use of advanced pedagogical methodologies in connection with advanced use of modern information technology for delivery enables new ways of communicating, of exchanging knowledge, and of learning that are gaining ...