Journal of Turbomachinery: Recent submissions
Now showing items 201-220 of 4312
-
Strategies for High-Accuracy Measurements of Stage Efficiency for a Cooled Turbine
(The American Society of Mechanical Engineers (ASME), 2024)Gas turbines are used in a broad range of aerospace and land-based applications from power generation to aviation, and their usage is projected to continue to grow. It is therefore critical to improve turbine efficiency ... -
The Role of Turbulence Transport in Mechanical Energy Budgets
(The American Society of Mechanical Engineers (ASME), 2024)In this article, we study the role of turbulence transport on loss prediction using high fidelity scale-resolving simulations. For this purpose, we use eight high-fidelity simulation datasets and compute flux of entropy ... -
Transonic Compressor Darmstadt Open Test Case: Experimental Investigation of Stator Secondary Flows and Hub Leakage
(The American Society of Mechanical Engineers (ASME), 2024)The future trend of clean sky aviation has led to a smaller core engine, resulting in highly loaded stages with increased relative tip gaps and leakage flows, which causes a reinforced influence of secondary flow phenomena. ... -
Attenuation of Inlet Distortion Effects on Fans Using Asymmetric Inlet Guide Vanes
(The American Society of Mechanical Engineers (ASME), 2024)This research proposes and preliminarily analyzes a novel concept to passively reduce the negative impact of deep inlet distortion on the fan of an aero-engine. It consists of placing a row of non-axisymmetric inlet guide ... -
On the Secondary Flow System of an Aggressive Inter Compressor Duct
(The American Society of Mechanical Engineers (ASME), 2024)In contrast to the highly optimized rotating components, the inter compressor duct (ICD) is offering a high potential for further improvements. Due to a more aggressive design, the length of the whole engine can be reduced. ... -
Experimental Analysis of the Time-Wise Compressor Fouling Phenomenon
(The American Society of Mechanical Engineers (ASME), 2024)Compressor fouling is still an unforeseen phenomenon. Gas turbines for heavy-duty and propulsion applications are subject to performance degradation due to fouling, erosion, and corrosion mechanisms. Unlike the last two, ... -
An Improved Body Force Model to Simulate Blade Loading Variation Under Various Operating Conditions in Transonic Axial Flow Compressor
(The American Society of Mechanical Engineers (ASME), 2024)In order to analyze the unsteady aerodynamic response of compressors with limited computational resources, the development of the body force (BF) model has been pursued for decades. This model can simulate the effects of ... -
Endwall Contouring for Improving Aerodynamic Performance in a High-Pressure Turbine Cascade
(The American Society of Mechanical Engineers (ASME), 2024)The endwall contouring has proven to be an effective technique in controlling the impacts of secondary flow within turbomachinery. A baseline cascade with the original axisymmetric endwall (BASE) has been redesigned with ... -
Turbine Cavity Mainstream Ingestion Assessing Method Based on Penetration Depth Analysis
(The American Society of Mechanical Engineers (ASME), 2024)The turbine cavity faces challenges from external mainstream ingestion, mitigated by sealing flow from the compressor side. Despite these efforts, achieving complete sealing remains difficult. This study focuses on introducing ... -
A Free Streamline Model for Fully Separated Turbomachine Flows
(The American Society of Mechanical Engineers (ASME), 2024)This paper describes the use of the free streamline approach to determine flows in fully separated cascades, and to thereby provide a rational basis for estimating the performance of axial turbomachinery at severely ... -
Effect of the Key Geometry and Flow Parameters on Discharge Coefficient of Laidback Fan-Shaped Hole Under Coolant Crossflow Condition
(The American Society of Mechanical Engineers (ASME), 2024)A laidback fan-shaped hole is commonly used due to its superior lateral film coverage. Its discharge coefficient is significantly influenced by internal crossflow owing to its complex geometrical structure. In this paper, ... -
Impact of High-Pressure-Turbine Purge Flow on the Evolution of Turbulence in a Turbine Vane Frame
(The American Society of Mechanical Engineers (ASME), 2024)This paper describes the measurement and postprocessing of turbulence data. The experiments were carried out in a two-stage, two-spool transonic turbine test rig at the Institute for Thermal Turbomachinery and Machine ... -
Experiments on Tuned UHBR Open-Test-Case Fan ECL5/CATANA: Performance and Aerodynamics
(The American Society of Mechanical Engineers (ASME), 2024)With the advancement of modern fan architectures, the lack of experimental benchmarks for the research community became apparent in the recent years. Enormous effort in the method development could not be validated on ... -
Analyzing Unsteady Turbomachinery Flow Simulations With Mixing Entropy
(The American Society of Mechanical Engineers (ASME), 2024)The prediction of unsteady aerodynamic loads is a central problem during the design of turbomachinery. Over the last 20 years, harmonic balance methods have been shown to be highly efficient for this task. A CPU-cost optimal ... -
Measurements of Turbulence in Compressible Low-Density Flows at the Inlet of a Transonic Linear Cascade With and Without Unsteady Wakes
(The American Society of Mechanical Engineers (ASME), 2024)In the present work, hot-wire anemometry was employed for the characterization of the turbulent field at the inlet of a high-speed low-pressure turbine cascade, in terms of turbulence intensity and integral length scales. ... -
Numerical Investigation of the Interaction of a Circumferential Groove Casing Treatment and Near-Tip Modifications for a Highly Loaded Low-Speed Rotor Under the Influence of Double Leakage
(The American Society of Mechanical Engineers (ASME), 2024)Eckel et al. (2023, “Numerical Investigation of Near-Tip Modifications for a Highly Loaded Low-Speed Rotor Under the Influence of Double Leakage,” ASME J. Turbomach., 145(4), p. 041003) proposed using a convex-profiled ... -
Design and Cooling Performance of Additively Manufactured Ceramic Turbine Vanes
(The American Society of Mechanical Engineers (ASME), 2024)Ceramic materials are of significant interest in aviation and power generation gas turbine engines due to their low density and ability to withstand high temperatures. Increased cycle thermal efficiency and higher specific ... -
Windage Torque Reduction in Low-Pressure Turbine Cavities Part I: Concept Design and Numerical Investigations
(The American Society of Mechanical Engineers (ASME), 2024)The windage torque on rotational walls has a negative effect on the performance of the low-pressure turbine. In this paper, three novel flow control concepts (FCCs) were proposed to reduce the windage torque within a turbine ... -
Extension and Validation of the Turbomachinery Capabilities of SU2 Open Source Computational Fluid Dynamic Code
(The American Society of Mechanical Engineers (ASME), 2024)Computational Fluid Dynamic (CFD) tools have revolutionized the way to design engineering systems, but most established codes are proprietary and closed-source, making it difficult, if not impossible, to modify, debug, or ... -
Computationally Efficient Workflow for Conjugate Heat Transfer With Large Eddy Simulation for Gas Turbine Combustors
(The American Society of Mechanical Engineers (ASME), 2024)Typical gas turbine combustor (GTC) and high-pressure turbine stage generally employs 10,000 to 100,000 small passages of cooling holes. Such an arrangement protects the solid walls through impingement and effusion cooling. ...