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RISReview of Geometric Uncertainty Quantification in Gas Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Due to the manufacturing error and in-service degradation of gas turbines, there is always a deviation between the actual geometry and the design geometry. This geometric deviation has a prominent uncertainty characteristic, ...
Phenomenon and Mechanism of Two Regime Surge in a Centrifugal Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: “Tworegimesurge†is a special instability behavior of compressors, which was investigated in this paper. When the compressor operates at medium rotor speed, mild surge happens first, where the transient pressure signals ...
A Method of Stall and Surge Prediction in Axial Compressors Based on Three-Dimensional Body-Force Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The occurrence of stall and surge in axial compressors has a great impact on the performance and reliability of aero-engines. Accurate and efficient prediction of the key features during these events has long been the focus ...
Loss Mechanisms and Flow Control for Improved Efficiency of a Centrifugal Compressor at High Inlet Prewhirl
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Variable inlet prewhirl is an effective way to suppress compressor flow instability. Compressors usually employ a high degree of positive inlet prewhirl to shift the surge line in the performance map to a lower mass flow ...
Experimental Investigation of High Pressure Ratio Centrifugal Compressor With Axisymmetric and Nonaxisymmetric Recirculation Device
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Centrifugal compressors used for turbochargers are required to have a wide operating range. A recirculation device, which consists of a bleed slot, an upstream slot, and an annular cavity connecting both slots, is often ...
Effects of Nonaxisymmetric Volute on Rotating Stall in the Vaneless Diffuser of Centrifugal Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Rotating stall is an important unstable flow phenomenon that leads to performance degradation and limits the stability boundary in centrifugal compressors. The volute is one of the sources inducing nonaxisymmetric flows ...
Shapley Additive Explanations of Multigeometrical Variable Coupling Effect in Transonic Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Optimization algorithms in the compressor detailed design stage generate big data of geometries and corresponding performances, but these data are often not exploited efficiently to unveil hidden compressor design guidance. ...
Lessons Learned Toward Estimating the High-Pressure Turbine Inlet Temperature Profile Using Measurements Acquired at the High-Pressure Turbine Exit
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To achieve higher thermal efficiency, gas turbines operate at increasingly higher turbine inlet temperatures, leading to the need for advanced cooling methods such as film cooling, impingement cooling, and passage cooling ...
Experimental Investigation on the Aerodynamic Instability Process of a High-Speed Axial-Centrifugal Compressor
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Aerodynamic instability plays an important role in compressor design and may cause performance degradation and fatigue damage. In this paper, an experimental study on the evolution of aerodynamic instability is carried out ...
Transient Tip Clearance Prediction Model Considering Transient Radial Temperature Distribution of Discs in a Gas Turbine Engine
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The tip clearance of turbomachinery components, such as compressor and turbine, significantly impacts the gas turbine engine performance, including the thrust and fuel consumption. Therefore, an appropriate prediction of ...