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Keywords: turbulence
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Proceedings Papers

Proc. ASME. GT2021, Volume 2A: Turbomachinery — Axial Flow Fan and Compressor Aerodynamics, V02AT31A044, June 7–11, 2021
Paper No: GT2021-60314
... 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...
Proceedings Papers

Proc. ASME. GT2021, Volume 2C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V02CT34A005, June 7–11, 2021
Paper No: GT2021-58711
... 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 Papers

Proc. ASME. GT2021, Volume 2C: Turbomachinery — Design Methods and CFD Modeling for Turbomachinery; Ducts, Noise, and Component Interactions, V02CT34A022, June 7–11, 2021
Paper No: GT2021-59414
... 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...
Proceedings Papers

Proc. ASME. GT2020, Volume 7B: Heat Transfer, V07BT12A062, September 21–25, 2020
Paper No: GT2020-15830
...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...
Proceedings Papers

Proc. ASME. GT2020, Volume 1: Aircraft Engine; Fans and Blowers, V001T10A007, September 21–25, 2020
Paper No: GT2020-15229
...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...
Proceedings Papers

Proc. ASME. GT2020, Volume 1: Aircraft Engine; Fans and Blowers, V001T10A009, September 21–25, 2020
Paper No: GT2020-15338
...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...
Proceedings Papers

Proc. ASME. GT2011, Volume 5: Heat Transfer, Parts A and B, 1925-1942, June 6–10, 2011
Paper No: GT2011-46037
... have implications for the vane aerodynamic design, but also for the cooling system design. HP NGV Heat transfer Combustor Swirl Aerothermodynamics Transonic turbine Vane Stator Turbulence HP VANE AERODYNAMICS AND HEAT TRANSFER IN THE PRESENCE OF AGGRESSIVE INLET SWIRL Imran Qureshi Andy...
Proceedings Papers

Proc. ASME. GT2009, Volume 2: Combustion, Fuels and Emissions, 657-667, June 8–12, 2009
Paper No: GT2009-59870
... 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...
Proceedings Papers

Proc. ASME. GT2008, Volume 3: Combustion, Fuels and Emissions, Parts A and B, 1021-1034, June 9–13, 2008
Paper No: GT2008-51320
... 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...
Proceedings Papers

Proc. ASME. GT2008, Volume 6: Turbomachinery, Parts A, B, and C, 1313-1322, June 9–13, 2008
Paper No: GT2008-50829
... 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...
Proceedings Papers

Proc. ASME. GT2008, Volume 6: Turbomachinery, Parts A, B, and C, 1419-1426, June 9–13, 2008
Paper No: GT2008-51340
... 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...
Proceedings Papers

Proc. ASME. GT2003, Volume 5: Turbo Expo 2003, Parts A and B, 373-383, June 16–19, 2003
Paper No: GT2003-38575
... 05 02 2009 This paper presents the combined effects of high turbulence and film cooling on the dispersion of a simulated hot streak as it passes over a scaled-up nozzle guide vane. Experimental data demonstrates a considerable decay in the strength of a hot streak due to turbulence...
Proceedings Papers

Proc. ASME. GT2003, Volume 5: Turbo Expo 2003, Parts A and B, 581-590, June 16–19, 2003
Paper No: GT2003-38716
...°. Measurements of the heat transfer coefficient with and without film cooling were taken, in order to determine the increase in the heat transfer coefficient due to coolant injection. These experiments were conducted with heated and unheated starting lengths, and with low and high mainstream turbulence levels...
Proceedings Papers

Proc. ASME. GT2003, Volume 2: Turbo Expo 2003, 301-310, June 16–19, 2003
Paper No: GT2003-38398
..., where grid-generated turbulence is dominant, and a region further downstream, strongly influenced by turbulence generated in the shear layer. In general the measured turbulence intensity scales well with the bulk velocity. For a systematic variation of the turbulent Reynolds number, Damköhler number...
Proceedings Papers

Proc. ASME. GT2002, Volume 3: Turbo Expo 2002, Parts A and B, 349-363, June 3–6, 2002
Paper No: GT2002-30198
... 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...
Proceedings Papers

Proc. ASME. GT2002, Volume 3: Turbo Expo 2002, Parts A and B, 75-87, June 3–6, 2002
Paper No: GT2002-30173
... 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...
Proceedings Papers

Proc. ASME. GT2004, Volume 3: Turbo Expo 2004, 867-876, June 14–17, 2004
Paper No: GT2004-54022
... 25 11 2008 This paper discusses the effects of varying pitch position on the attenuation of a simulated hot streak in a vane cascade under conditions of low and high turbulence. Measurements describe the effect of both small and large changes in pitch away from the stagnation line...
Topics: Turbulence
Proceedings Papers

Proc. ASME. GT2004, Volume 3: Turbo Expo 2004, 201-212, June 14–17, 2004
Paper No: GT2004-53230
... The film-cooling performance of a flat plate in the presence of low and high freestream turbulence is investigated using thermochromic liquid crystal thermography. Distributions of the convective heat transfer coefficient and adiabatic effectiveness are determined over the film-cooled surface...
Proceedings Papers

Proc. ASME. GT2005, Volume 2: Turbo Expo 2005, 87-96, June 6–9, 2005
Paper No: GT2005-68152
... in the region near the swirl vanes strongly influences the mixing of the fuel and air. Frequency analysis of the fuel concentration data shows that some turbulent structures prevail throughout the mixing region in both mixers, revealing that some large scale flow features emanating from the swirl vanes...
Proceedings Papers

Proc. ASME. GT2006, Volume 3: Heat Transfer, Parts A and B, 909-920, May 8–11, 2006
Paper No: GT2006-91131
... 11 09 2008 Measurements using a novel heat flux sensor were performed in an internal ribbed channel representing the internal cooling passages of a gas turbine blade. These measurements allowed for the characterization of heat transfer turbulence levels and unsteadiness not previously...