... experimental work cooling systems internal flow CFD data analysis turbulence visualization Abstract Computational Fluid Dynamics (CFD) is the standard tool in the turbomachinery industry to analyze and optimize internal cooling systems of turbine components, but the code applied has...

... at the exit of the prediffuser and the impact that could have on flow split predictions provided to the combustor, Reynold’s stress turbulence models (RSM) are typically used. The combined effort of creating structured meshes, with the difficulty in converging results with RSM can negatively impact design...

... motion case is highly unstable, and anisotropic turbulence occurs. The Reynolds stress components are also investigated to show that vortex breakdown and turbulence characteristics. Besides, two typical Reynolds-averaged Navier-Stokes (RANS) models (Sparlat-Allmaras (SA) model and k-ω shear stress...

... Abstract In order to effectively alleviate the heat transfer deterioration phenomenon of supercritical CO 2 (S-CO 2 ) in a vertical circular tube, explores the fluid hydraulic and thermal performance of multiple turbulator distributed along helices through a verified standard k-ω model...

... Abstract The tip region of transonic blades in turbomachinery involves complex flow physics including shock wave/boundary layer interactions (SBLI). SBLI can lead to flow separation, transition from laminar to turbulent flow, and unsteadiness, which can affect the overall performance...

... Abstract Open rotor fan blades, when exercised across a range of operating conditions and design options, present a variety of complex flow physics including leading-edge flow separation, wake evolution and interaction effects, and laminar-to-turbulent transition. In this paper, we present...

... Abstract The optimal turbulence model to be used in a CFD simulation varies depending on the application and the scientific question at hand. It is always a difficult task to predict which model best represents reality. This study focuses on the internal cooling system of a high-pressure...

... the S groove. The shear matched facility examine the effect of axial casing grooves layers generated as the flows jet out from the upstream ends of (ACGs) geometry on the turbulence in the tip region of an axial the grooves also bring varying elevated turbulence. At BEP, compressor rotor. The ACGs delay...

... Kapilavai Evendale, OH GE Research Niskayuna, NY ABSTRACT Keywords: LES, high-order, wall-resolved, turbine, Engineers performing computational simulations of flow turbulence, aircraft engine, HPC, unstructured grids, GPU physics are often faced with a trade-off between turn-around time and accuracy. High...

... Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-59414 EVALUATION OF DIFFERENT TURBULENCE MODELS APPLIED IN TURBOPUMP S HYDRAULIC TURBINE Daniel Ferreira Daniel da Silva Tonon Luiz Henrique Jesuino Takachi Corrêa...

...EFFECTS OF AXIAL CASING GROOVES ON THE STRUCTURE OF TURBULENCE IN THE TIP REGION OF AN AXIAL TURBOMACHINE ROTOR Huang Chen1, Yuanchao Li1, Subhra Shankha Koley1, Joseph Katz 1* 1 Johns Hopkins University, Department of Mechanical Engineering, Baltimore, MD, USA *katz@jhu.edu ABSTRACT Challenges...

...MACHINE LEARNT SYNTHETIC TURBULENCE FOR LES INFLOW CONDITIONS Alessandro Corsini1, Giovanni Delibra1, Marco Giovannelli1, Stefania Traldi1 1Department of Mechanical and Aerospace Engineering Sapienza University of Rome, Italy ABSTRACT LES computations have limited applications in turbomachinery...

...Abstract Abstract Large eddy simulations on well-known 7-7-7 fan shaped cooling hole have been carried out. Film cooling methods are generally applied to high pressure turbine, of which flow condition is extremely turbulent because high pressure turbines are generally located downstream...

.... The findings not only have implications for the vane aerodynamic design, but also for the cooling system design. Keywords: HP NGV, Heat transfer, Combustor Swirl, Aerothermodynamics, Transonic turbine, Vane, Stator, Turbulence. 1 INTRODUCTION Highly swirling flows are now widely employed in gas turbine...

... in the time domain based on statistical turbulence quantities. Subsequently, the propagation of the combustion noise is computed by solving the acoustic perturbation equations (APE-4). The accuracy of the RPM-CN approach will be demonstrated by a good agreement of the simulation results with acoustic...

... for the reaction rate. The response of the thickened flame to turbulence is taken care of by incorporating an efficiency function in the governing equations. The efficiency function, which is also known as a sub-grid flame wrinkling parameter, is a function of local turbulence and of the premixed flame...

... is not the same as that commonly used in turbulence models, even when the periodic components are removed from consideration. In particular, the “pseudo-integral-scale”, L ε = q 3 / ε , defined from the turbulence intensity and dissipation, can differ by an order of magnitude or more from the true integral...

... investigation of the time-averaged mean flow field and turbulence development in an aggressive intermediate turbine duct (downstream a rotating turbine stage) using a 5-hole probe and 2-component hot-wire anemometry. In addition the duct endwall static pressure distribution is discussed. The investigation...

... factors ranged from 25 to 63, preserving the roughness height to boundary layer momentum thickness ratio for each case. The roughness models include samples of deposits, TBC spallation, erosion, and pitting. Measurements were made in a zero pressure gradient turbulent boundary layer at two Reynolds...

... 05 02 2009 The film-cooling performance of a flat plate in the presence of low and high freestream turbulence is investigated using thermochromic liquid crystal thermography. Full-surface distributions of the convective heat transfer coefficient are determined for three blowing rates...