Journal of Turbomachinery: Recent submissions
Now showing items 441-460 of 4519
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The Effect of Upstream Unsteadiness on the Unstarting of a Supersonic Inlet Turbine
(The American Society of Mechanical Engineers (ASME), 2023)A 15% increase in thermal efficiency at medium pressure ratios is promised by rotating detonation engine technology over conventional Joule–Bryton cycles. A supersonic inlet turbine is a viable option to extract substantial ... -
The Impact of the Off-Design Conditions on the Entropy Wave Interaction With a High-Pressure Turbine Stage
(The American Society of Mechanical Engineers (ASME), 2023)The study of component interactions in aeronautical engines is a key aspect to improve the aerodynamic, aeromechanical, and thermal performance and to reduce greenhouse gas and noise emissions. In this context, combustor ... -
A Model of Mass and Heat Transfer for Disc Temperature Prediction in Open Compressor Cavities
(The American Society of Mechanical Engineers (ASME), 2023)Accurate prediction of heat transfer in compressor cavities is crucial to the design of efficient and reliable aircraft engines. The heat transfer affects the thermal expansion of the compressor rotor and, in turn, the tip ... -
Reviewer’s Recognition
(The American Society of Mechanical Engineers (ASME), 2024)The Editor-in-Chief and Editorial Board of the ASME Journal of Turbomachinery would like to thank all of the reviewers for volunteering their expertise and time in reviewing manuscripts in 2023. Serving as reviewers for ... -
A Method for Preliminary Design of Variable Geometry Vaned Diffuser for Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2023)Centrifugal compressors require a wide operating range as well as high efficiency. Typical active control forms to enhance the operating range are suction throttling with a valve in a suction line, discharge throttling ... -
Experimental Investigation of the Effect of Bleed on the Aerodynamics of a Low-Pressure Compressor Stage in a Turbofan Engine
(The American Society of Mechanical Engineers (ASME), 2023)The compression system in modern turbofan engines is split into stages linked by transition ducts. Downstream of the low-pressure system, a handling bleed is often required and, in conjunction with structural vanes, can ... -
Effects of Riblet Dimensions on the Transitional Boundary Layers Over High-Lift Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2023)Substantial research exists in the literature on reducing the profile loss of transitional boundary layers over low-pressure turbine (LPT) blades via different mechanisms such as freestream turbulence, upstream wakes, and ... -
Improved Spatiotemporal Distributions of Sweeping Jet Film Cooling With a Shaped Exit Design
(The American Society of Mechanical Engineers (ASME), 2023)Sweeping jet (SJ) is a self-excited flow control device that can generate continuous and periodic flow, which makes it a promising geometry for film cooling. However, the cooling performance of current SJ configurations ... -
Direct Numerical Simulation of Transitional and Turbulent Flows Over Multi-Scale Surface Roughness—Part II: The Effect of Roughness on the Performance of a High-Pressure Turbine Blade
(The American Society of Mechanical Engineers (ASME), 2023)Turbine blades generally present surface roughness introduced in the manufacturing process or caused by in-service degradation, which can have a significant impact on aero-thermal performance. A better understanding of the ... -
Direct Numerical Simulation of Transitional and Turbulent Flows Over Multi-Scale Surface Roughness—Part I: Methodology and Challenges
(The American Society of Mechanical Engineers (ASME), 2023)High-fidelity simulation of transitional and turbulent flows over multi-scale surface roughness presents several challenges. For instance, the complex and irregular geometrical nature of surface roughness makes it impractical ... -
Experimental Investigations on the Effects of Surface Roughness for Compressor Cascades With Different Roughness Magnitude and Location
(The American Society of Mechanical Engineers (ASME), 2023)Blade surface roughness could significantly affect the aerodynamic performance of compressors. To explore the influence of roughness magnitude and location on blade performance, experiments were conducted in a low-speed ... -
The Effects of Channel Supplies on Overall Film-Cooling Effectiveness
(The American Society of Mechanical Engineers (ASME), 2023)Cooling components in the hot section of a gas turbine are essential to component durability. Common methods of cooling include rib turbulators in internal passages and film cooling on external surfaces. The holes that ... -
Multi-Objective Numerical Optimization of Radial Turbines
(The American Society of Mechanical Engineers (ASME), 2023)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 ... -
Unsteady Flow Structure of Corner Separation in a Highly Loaded Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2023)Corner separation is an inherently unsteady flow feature in an axial compressor cascade, and it significantly affects the aerodynamic performance of compressors. The flow field of a highly loaded compressor cascade at the ... -
Understanding the Effect of Three-Dimensional Design in Tandem Blade
(The American Society of Mechanical Engineers (ASME), 2023)In order to maximize the pressure ratio and efficiency, compressor designers have tried several unconventional design approaches. Tandem blading is one such unconventional design that promises a higher pressure ratio per ... -
Study on Additive Effect of Film Cooling Effectiveness in Two Rows of Fan-Shaped Holes
(The American Society of Mechanical Engineers (ASME), 2023)The coolant jet interaction has a great influence on the superposition prediction of multirow film cooling. Although there have been many efforts to reveal the mechanics of additive effect in multirow film cooling, the ... -
Aerodynamic and Thermal Field Development of Cooled Transonic HP NGV
(The American Society of Mechanical Engineers (ASME), 2023)In this study we present detailed aerodynamic and thermal field measurements downstream of an annular cascade of fully-cooled nozzle guide vanes (NGVs). The experiments were conducted in the Engine Component Aerothermal ... -
Understanding Thermal Unsteadiness in Engine Representative Flows and Improved Methodologies for Derived Heat Transfer Calculations Using Thin-Film Gauges
(The American Society of Mechanical Engineers (ASME), 2023)The Oxford Turbine Research Facility (OTRF) is a high-speed rotating transient test facility, which allows unsteady aerodynamic and heat transfer measurements at engine representative conditions. In addition, a variety of ... -
Time-Averaged Aerodynamics of a High-Speed Low-Pressure Turbine Cascade With Cavity Purge and Unsteady Wakes
(The American Society of Mechanical Engineers (ASME), 2023)The time-averaged aerodynamics of a high-speed low-pressure turbine (LPT) cascade were investigated under the impact of unsteady wakes and purge flows. The tests were performed at an outlet Mach (M) and Reynolds numbers ... -
A Numerical Test Rig for Turbomachinery Flows Based on Large Eddy Simulations With a High-Order Discontinuous Galerkin Scheme—Part III: Secondary Flow Effects
(The American Society of Mechanical Engineers (ASME), 2023)In this final paper of a three-part series, we apply the numerical test rig based on a high-order discontinuous Galerkin scheme to the MTU T161 low-pressure turbine with diverging end walls at off-design Reynolds number ...