Journal of Turbomachinery: Recent submissions
Now showing items 121-140 of 4312
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Multirow Film-Cooling Effectiveness of Vertically Oriented Slot Cross-Section Diffusion Holes on a Turbine Nozzle Guide Vane Suction Surface
(The American Society of Mechanical Engineers (ASME), 2024)In this article, a multirow film-cooling effectiveness experiment was conducted on a turbine nozzle guide vane suction surface using the pressure-sensitive paint (PSP) measurement technique. Five rows of film holes were ... -
Scale Cooling—A Novel Fractal Cooling Structure for Turbine Vanes
(The American Society of Mechanical Engineers (ASME), 2024)Additive manufacturing technology provides the possibility of more efficient turbine cooling structures. In this work, a novel structure for turbine air-cooled vane based on fractal structure, named scale cooling structure, ... -
Robust Design Optimization of a Compressor Rotor Using Recursive Cokriging Based Multi-Fidelity Uncertainty Quantification and Multi-Fidelity Optimization
(The American Society of Mechanical Engineers (ASME), 2024)This work focuses on the application of multi-fidelity methods for the robust design optimization of engine components. The robust design optimization approach yields geometric designs that have high efficiencies and are ... -
Effects of Localized Non-Gaussian Roughness on High-Pressure Turbine Aerothermal Performance: Convective Heat Transfer, Skin Friction, and the Reynolds’ Analogy
(The American Society of Mechanical Engineers (ASME), 2024)Compressible direct numerical simulations are conducted to investigate how surface roughness affects the aerothermal performance of a high-pressure turbine vane operating at an exit Reynolds number of 0.59 ×106 and exit ... -
On Intake–Compressor Interactions Within an Integrated Propulsion System
(The American Society of Mechanical Engineers (ASME), 2024)The integration of a propulsion system into the airframe can contribute to the overall aircraft performance and is beneficial for military applications due to a reduction of the aircraft radar cross section. On the other ... -
Enhancing Total Temperature Measurement Accuracy: Calibration Procedures and Novel Two-Wire Probes
(The American Society of Mechanical Engineers (ASME), 2024)Total temperature measurement with thermocouple probes suffers from errors due to heat transfer effects. Two dominant sources of errors are convection and conduction between the thermocouple, the support, and the flow. ... -
The Development of Machine Learning Models for Radial Compressor Monitoring With Instability Detection
(The American Society of Mechanical Engineers (ASME), 2024)Modern radial compressors are designed to operate with high performance and a wide range of applications while minimizing their environmental impact. It is necessary to study the machine near the stability limit and gain ... -
Film-Cooling Performance Comparison of Blade Tips With a Trailing Edge, Pressure Side Cutback, or a Suction Side Squealer in a Transonic Linear Cascade
(The American Society of Mechanical Engineers (ASME), 2024)Film-cooling effectiveness and leakage flow play crucial roles in turbine blade heat transfer. In contrast to the conventional trailing edge cutback squealer blade tip (CB tip), this study aims to compare the film-cooling ... -
Geometric and Flow Characterization of Additively Manufactured Turbine Blades With Drilled Film Cooling Holes
(The American Society of Mechanical Engineers (ASME), 2024)As designers investigate new cooling technologies to advance future gas turbine engines, manufacturing methods that are fast and accurate are needed. Additive manufacturing facilitates the rapid prototyping of parts at a ... -
Conceptual Analysis on the Impact of Acoustic Liners in Fan Flutter
(The American Society of Mechanical Engineers (ASME), 2024)This work investigates the impact of acoustically treated intakes on fan flutter. The propagation of the fan acoustic perturbations is studied using a simplified model, where the frequency of the waves in the intake is the ... -
Phantom Cooling Effects on Rotor Blade Surface Heat Flux in a Transonic Full Scale 1 + 1/2 Stage Rotating Turbine
(The American Society of Mechanical Engineers (ASME), 2024)An experimental and numerical investigation of phantom cooling effects on cooled and uncooled rotating high pressure turbine blades in a full scale 1 + 1/2 stage turbine test is presented. Objectives set to capture, separate, ... -
An Analytical Study on the Effects of Non-Uniform Vane Spacing on Forced Response Reduction in a Mistuned Blisk Rotor in a Multistage Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2024)Stators with non-uniform vane spacing (NUVS) have been sought as an effective way to reduce the rotor-forced response at certain resonance crossing of concern. A comprehensive experimental study has been conducted in Purdue ... -
Characteristics of Deterministic and Stochastic Unsteadiness of Trailing Edge Cutback Film Cooling Flows
(The American Society of Mechanical Engineers (ASME), 2024)Trailing edge cutback film cooling flows are ubiquitous in small and medium gas turbines, but they are difficult to predict accurately due to the inherent deterministic and stochastic unsteadiness that controls the ... -
An Investigation of Secondary Cooling Effect on the Endwall Surface With Vane Trailing Edge Coolant Injection
(The American Society of Mechanical Engineers (ASME), 2024)Considering the adequate use of coolant, the secondary cooling effect of trailing edge coolant injection on the downstream endwall surface is investigated in this study. Distributions of adiabatic cooling effectiveness on ... -
Boundary Layer Analysis of a Transonic High-Pressure Turbine Vane Using Ultra-Fast-Response Temperature-Sensitive Paint
(The American Society of Mechanical Engineers (ASME), 2024)The focus of this article is the impact of surface roughness on the boundary layer caused by a 7YSZ thermal barrier coating (TBC). Experimental investigations are conducted on a NGV installed inside the wind tunnel for ... -
Numerical Investigation of Flow Evolution in Centrifugal Compressors During Surge
(The American Society of Mechanical Engineers (ASME), 2024)Surge can lead to violent flow fluctuations in the compression system and damage to the blade structures. In this article, a fully three-dimensional numerical model of the centrifugal compressor surge is developed, and the ... -
Axial Compressor Transonic Rotor Shock Interaction With Upstream Stator Row
(The American Society of Mechanical Engineers (ASME), 2024)Modern multistage axial compressors are designed for high aerodynamic loading and wide range with front stages rotor inlet relative Mach number above one over a large portion of span. Rotor shock waves propagate and reflect ... -
Experimental Investigation of Mode-Frequency Scattering at Fan Stages
(The American Society of Mechanical Engineers (ASME), 2024)For the development of low-noise fan designs the sound generation must be reduced at the source, but also sound transmission effects through the rotor can be exploited to reduce the noise emitted to the far-field. Rotor ... -
Numerical Investigation of the Effect of Trailing Edge Thickness of Simulated Ceramic Matrix Composite Blades on Loss Profiles
(The American Society of Mechanical Engineers (ASME), 2024)Ceramic matrix composite (CMC) is an enabling material allowing higher turbine inlet temperatures and possibly resulting in better thermal efficiency of gas turbine engines. This is because CMC layers with environmental ... -
Purge–Mainstream Interactions in a Turbine Stage With Rotor Endwall Contouring
(The American Society of Mechanical Engineers (ASME), 2024)Purge flows are prevalent in modern gas turbine design, allowing for increased turbine entry temperatures. The purge flow passes through a rim seal and interacts with the mainstream flow, modifying the blade secondary flow ...