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RISDetecting Multidimensional Pareto Fronts During the Optimization of a Return Channel Within a Centrifugal Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: We explain the advantages of using big-data methods for evaluating numerical optimization. The investigation focuses on the performance potential of three-dimensional return channel vanes under realistic manufacturing ...
A Novel Gas Generator Concept for Jet Engines Using a Rotating Combustion Chamber
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A gas generator—consisting of a singlestage shrouded mixedflow compressor without a diffusor, a rotating combustion chamber, and a vaneless singlestage shrouded centripetal turbine—is presented and analyzed here. All ...
Advanced Rayleigh Pressure Loss Model for High Swirl Combustion in a Rotating Combustion Chamber
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper considers the effect of excessive total pressure losses for heat transfer problems in fluid flows with a high circumferential swirl component. At RWTH Aachen University, a novel gas generator concept is under ...
Rotor-Alone Tones in the Outflow Noise of a Centrifugal Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This article investigates the generation of rotor-alone tones and their contribution to the outflow noise of a transonic centrifugal compressor stage with vaneless diffuser and volute by means of unsteady full-annulus ...
Teaching Aero-Engine Performance: From Analytics to Hands-On Exercises Using Gas Turbine Performance Software
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper, we present an approach for teaching turbojet engine performance that combines mathematical analysis with the use of performance software to provide students with a comprehensive and in-depth understanding ...
Experimental Investigation of a Truncated Pipe Diffuser With a Tandem Deswirler in a Centrifugal Compressor Stage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The subject of this paper is the experimental investigation of three different geometric configurations of the diffusing system in a high pressure centrifugal compressor stage for a jet engine application. The objective ...
Numerical Investigation of the Unsteady Flow Inside a Centrifugal Compressor Stage With Pipe Diffuser
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The subject of this paper is the investigation of unsteady flow inside a transonic centrifugal compressor stage with a pipediffuser by utilizing unsteady 3D Reynoldsaveraged Navier–Stokes simulations (unsteady 3D URANS). ...
Evaluation of Measurement Uncertainties for Pneumatic Multihole Probes Using a Monte Carlo Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The subject of this paper is a statistical method for the evaluation of the uncertainties for pneumatic multihole probe measurements. The method can be applied to different types of evaluation algorithms and is suitable ...
Influence of Purge Flow Injection on the Performance of an Axial Turbine With Three-Dimensional Airfoils and Non-Axisymmetric Endwall Contouring
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In this paper, we present the evaluation of the aerodynamic robustness to rim seal purge flow of an optimized 1.5-stage axial turbine configuration with a bowed stator profile and endwall contouring. Performance maps ...
Accuracy of Steady Pneumatic Probes in Unsteady Turbomachinery Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This study shows that no additional measurement error due to unsteadiness was detected, when measuring in periodic turbomachinery flows at frequencies up to 5 kHz with steady, pneumatic probes. An experiment was designed, ...