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RISApproximating Gas Turbine Combustor Exit Temperature Distribution Factors Using Spatially Under-Sampled Measurements
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In gas turbine engines, the temperature field at the exit plane of the combustor is highly unsteady and complex, with large radial and circumferential variations. The circumferential temperature variations (hot-streaks) ...
Reconstructing Compressor Non-Uniform Circumferential Flow Field From Spatially Undersampled Data—Part 1: Methodology and Sensitivity Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The flow field in a compressor is circumferentially non-uniform due to the wakes from upstream stators, the potential field from both upstream and downstream stators, and blade row interactions. This non-uniform flow impacts ...
On Choosing the Optimal Impeller Exit Velocity Triangles in Preliminary Design
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Impeller discharge flow plays an important role in centrifugal compressor performance and operability for two reasons. First, it determines the work factor and relative diffusion for the impeller. Second, it sets the flow ...
The Effect of Gas Models on Compressor Efficiency Including Uncertainty
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Since isentropic efficiency is widely used in evaluating the performance of compressors, it is essential to accurately calculate this parameter from experimental measurements. Quantifying realistic bounds of uncertainty ...
Investigation of Surge in a Transonic Centrifugal Compressor With Vaned Diffuser—Part I: Surge Signature
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The identification of stall inception mechanisms and stability-limiting components in a centrifugal compressor is required for the development of effective surge suppression approaches. Part I of this two-part paper ...
Details of Shrouded Stator Hub Cavity Flow in a Multistage Axial Compressor Part 2: Leakage Flow Characteristics in Stator Wells
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The flow in shrouded stator cavities can be quite complex with axial, radial, and circumferential variations. As the leakage flow recirculates and is re-injected into the main flow path upstream of the stator, it deteriorates ...
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 ...
A New Approach for Centrifugal Impeller Preliminary Design and Aerothermal Analysis
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper introduces a new approach for the preliminary design and aerothermal analysis of centrifugal impellers using a relative diffusion effectiveness parameter. The relative diffusion effectiveness is defined as the ...
Multifidelity Optimization Under Uncertainty for Robust Design of a Micro-Turbofan Turbine Stage
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper presents a multifidelity optimization strategy for efficient uncertainty quantification and robust optimization applicable to turbomachinery blade design. The proposed strategy leverages freeform parameterization ...
Compressor Stall Warning Using Nonlinear Feature Extraction Algorithms
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Stall is a type of flow instability in compressors that sets the low-flow limit for compressor operation. During the past few decades, efforts to develop a reliable stall warning system have had limited success. This paper ...