Journal of Turbomachinery: Recent submissions
Now showing items 861-880 of 4519
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Physical Mechanisms Investigation of Sharkskin-Inspired Compressor Cascade Based on Large Eddy Simulations
(The American Society of Mechanical Engineers (ASME), 2021)To survive in a complex environment, nature has produced efficient and versatile resource-rich structures. One of the novel drag reduction designs comes from the efficient movement of sharks through microscope riblets ... -
Azimuthal Mode Characteristics of Rotating Instability in Axial Compressor Using Compressed Sensing Method
(The American Society of Mechanical Engineers (ASME), 2021)A signal reconstruction algorithm based on the compressed sensing (CS) theory with dual-uniform sampling point (DUSP) distribution is developed and applied to identify the azimuthal mode of axial compressor. A regular ... -
Formation of High-Temperature Minerals From an Evaporite-Rich Dust in Gas Turbine Engine Ingestion Tests
(The American Society of Mechanical Engineers (ASME), 2021)The ingestion of multi-mineral dusts by gas turbine engines during routine operations is a significant problem for engine manufacturers because of the damage caused to engine components and their protective thermal barrier ... -
Effect of Boundary Layer Suction on the Corner Separation in a Highly Loaded Axial Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2021)Control of corner separation in axial compressor blade rows has attracted much interest due to its potential to improve compressor efficiency and the energy utilization in turbomachinery. This paper investigates the ... -
Nonlinear Stability Analysis of a Generic Fan With Distorted Inflow Using Passage-Spectral Method
(The American Society of Mechanical Engineers (ASME), 2021)The dependence of the aerodynamic stability of fan blades with the nodal diameter and amplitude of the inlet perturbations is studied. The analysis is conducted using a block-wise spatial Fourier decomposition of reduced ... -
Heat Transfer Coefficient Augmentation for a Shaped Film Cooling Hole at a Range of Compound Angles
(The American Society of Mechanical Engineers (ASME), 2021)Film cooling holes with shaped diffusers are used to efficiently deliver coolant to the surface of a gas turbine part to keep metal temperatures low. Reducing the heat flux into a component, relative to a case with no ... -
Impact of Turbine-Strut Clocking on the Performance of a Turbine Center Frame
(The American Society of Mechanical Engineers (ASME), 2021)Previous studies have indicated a potential for improving the performance of a turbine center frame (TCF) duct by optimizing the clocking position between the high-pressure turbine (HPT) vanes and TCF struts. To assess the ... -
Dynamics of Shock Waves Interacting With Laminar Separated Transonic Turbine Flow Investigated by High-Speed Schlieren and Surface Hot-Film Sensors
(The American Society of Mechanical Engineers (ASME), 2021)The results presented in this paper are based on experimental investigations on a generic transonic low pressure turbine profile at high subsonic exit Mach numbers. Here, the flow on the suction side reaches a maximum ... -
Experimental Investigation of Film Cooling Performance on Blade Endwall With Diffusion Slot Holes and Stator–Rotor Purge Flow
(The American Society of Mechanical Engineers (ASME), 2021)This paper focuses on the influences of the discrete-hole shape and layout on the blade endwall film cooling effectiveness. The effect of upstream purge slot injection on the film cooling performance of the discrete hole ... -
Experimental Study of Vaneless Diffuser Rotating Stall Development and Cell-Merging Phenomena
(The American Society of Mechanical Engineers (ASME), 2021)This paper describes the vaneless diffuser rotating stall (VDRS) development and cell-merging phenomena. A centrifugal compressor’s lifespan may be limited by flow instabilities occurring in off-design operation. One such ... -
Heat Transfer Characteristics Within the Matrix Cooling Channels
(The American Society of Mechanical Engineers (ASME), 2021)Matrix or latticework cooling has become a new area of research due to its advantage of providing a structural rigidity to the fragile structures like gas turbine blades, electronic components or circuitries, and compact ... -
Redesign of Axial Fan Using Viscous Inverse Design Method Based on Boundary Vorticity Flux Diagnosis
(The American Society of Mechanical Engineers (ASME), 2021)The inverse design method for turbomachinery can directly acquire a blade geometry with specific aerodynamic parameters, such as pressure loading on the blade surfaces. The difference between the inverse design and direct ... -
Effect of Radiation on Heat Transfer Inside Aeroengine Compressor Rotors
(The American Society of Mechanical Engineers (ASME), 2021)The blade clearance in aero-engine compressors is mainly controlled by the radial growth of the compressor discs, to which the blades are attached. This growth depends on the radial distribution of the disc temperature, ... -
Experimental Investigation of Innovative Cooling Schemes on an Additively Manufactured Engine Scale Turbine Nozzle Guide Vane
(The American Society of Mechanical Engineers (ASME), 2021)This study includes the design, validation, and fabrication via direct metal laser sintering (DMLS) of a gas turbine nozzle guide vanes (NGV) that incorporates three innovative cooling schemes specifically enabled by ... -
Fan Aerodynamics With a Short Intake at High Angle of Attack
(The American Society of Mechanical Engineers (ASME), 2021)Fans that are designed to maintain thrust at the high angle of attack (AOA) flight condition could exploit the cruise fuel burn benefit of a shorter intake design. This article considers how the fan rotor radial pressure ... -
Experimental Study on Aerodynamic Loss and Heat Transfer for Various Squealer Tips
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents aerodynamic loss data for five squealer configurations of a full squealer (FS), a pressure-side squealer (PS), a suction-side squealer (SS), a camberline squealer (CS), and a full-camberline squealer ... -
Understanding Capacity Sensitivity of Cooled Transonic Nozzle Guide Vanes: A Parametric Experimental and Computational Study of the Impact of Trailing Edge Geometry
(The American Society of Mechanical Engineers (ASME), 2021)High-pressure (HP) nozzle guide vane (NGV) capacity is one of the most important parameters for setting overall turbine power output, for stage matching, and for understanding turbine performance. Accurate capacity prediction ... -
Acquisition and Processing Considerations for Infrared Images of Rotating Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2021)As designers aim to increase efficiency in gas turbines for aircraft propulsion and power generation, spatially resolved experimental measurements are needed to validate computational models and compare improvement gains ... -
Fully Coupled Large Eddy Simulation-Conjugate Heat Transfer Analysis of a Ribbed Cooling Passage Using the Immersed Boundary Method
(The American Society of Mechanical Engineers (ASME), 2021)The study focuses on evaluating fully coupled conjugate heat transfer (CHT) simulation in a ribbed cooling passage with a fully developed flow assumption using large eddy simulation (LES) with the immersed boundary method ... -
Volumetric Velocimetry Measurements of Purge–Mainstream Interaction in a One-Stage Turbine
(The American Society of Mechanical Engineers (ASME), 2021)Air-cooled gas turbines employ bleed air from the compressor to cool vulnerable components in the turbine. The cooling flow, commonly known as purge air, is introduced at low radius, before exiting through the rim-seal at ...