... and simulations possible, simplified geometry and boundary conditions are often used, for example, simulations of primary atomization often use a fixed film height and velocity. This paper aims to quantify the effect of a fully developed unsteady film on the atomization process. A custom Coupled Level Set...

... film cooling effect at M = 0.5. e-mail:  xinyan@mail.xjtu.edu.cn 29 03 2021 01 07 2021 27 09 2021 cutback land film cooling DDES unsteady National Natural Science Foundation of China 10.13039/501100001809 52076165 As the modern gas turbine...

..., an innovative calculation approach called the equalized timescales method (ET) was applied for the modeling of unsteady conjugate heat transfer (CHT). In the course of the research, the setup of the ET approach has been additionally investigated. Using the ET method, the mass flow rate and the rotational speed...

... Finite element Flow induced vibration Fuels Modeling Periodic Thermoacoustics Unsteady Unsteady flows Vibration Wave propagation Flow induced noise Combustion Can-annular combustors are common in heavy-duty land based gas turbines. In this design, the air flows from the compressor...

... Structural dynamics Unsteady Flow induced noise Nuclear turbine rotor operating on wet steam is facing intractable flow-induced vibration (FIV) problems, which might be exacerbated due to non-equilibrium condensation process of wet steam. The vibration responses of the rotor blade induced by non...

... to thermoacoustic instabilities. These self-sustained oscillations result from a positive coupling between sound pressure and unsteady heat release [ 1 ] when the combustor is operated under unfavorable conditions. As a result, this may lead to blowout of the flame, increased pollutant formation, or in the worst...

...Chirag Trivedi This work investigates the unsteady pressure fluctuations and inception of vortical flow in a hydraulic turbine during speed-no-load conditions. At speed-no-load (SNL), the available hydraulic energy dissipates to the blades without producing an effective torque. This results in high...

.... 09 11 2017 12 12 2017 Burners Combustion Combustors Experimental Flame Nonintrusive diagnostics Thermoacoustics Unsteady Unsteady flows Increasingly stringent pollutant emission regulations lead aircraft engine manufacturers to move away from traditional diffusion flame...

... Unsteady Control systems To address the challenge of modeling gas turbine (GT) start-up, white-box, gray-box, and black-box models can be considered as the main categories of system models. White-box models are usually used with coupled and dynamics equations, thermodynamic relations, energy...

... of a given unstable/stable operation point in terms of their distance from the Hopf bifurcation point occurs via the system growth/damping rates. The methodologies solely rely on dynamic measurement data (i.e., unsteady heat release and/or pressure recordings) while avoiding the need of any external...

... Wisler. 26 07 2017 09 08 2017 Aeronautical propulsion Aerothermodynamics Combustion Combustors Computational fluid dynamics Engines Flame Fuel combustion Fuels Gas turbine technology Modeling Multiphase flows Sprays Swirling Turbulence Turbulent Two-phase Unsteady...

... Thermoacoustics Thermodynamics Turbulence Turbulent Unsteady Unsteady flows Visualization Wave propagation Coupled behavior Combustion Avoidance of thermoacoustically driven pressure pulsations at screech level frequencies presents a considerable engineering challenge in the development of modern...

... Energy conversion Energy systems Power Unsteady Control systems Co- generation Nowadays, micro-CHP (combined heat and power) systems for residential and nonindustrial users are one of the most studied topics for energy production. In fact, an overview of CHP technologies is presented...

...-phase Unsteady Aerospace Propulsion systems A considerable research effort has concerned combustion dynamics issues with much of this work focused on problems raised by gas turbines. These machines operate in a lean premixed combustion mode to reduce NO x emissions, the flames are more...

..., 2017. Assoc. Editor: Klaus Brun. 30 05 2017 10 07 2017 Aeronautical propulsion Aerospace applications Design optimization Droplet Experimental Film Fluids Gas turbine technology Multiphase flows Separated Shear Flows Turbulent Two-phase Unsteady Aerospace Propulsion...

... Turbulent Two-phase Unsteady Unsteady flows Steam turbines, which account for a large part of the world power generation, in order to cope with the growth of the renewable energies share in the power generation mix, are required operational flexibility. This means that nowadays a considerable...

... AS T URBINES AND P OWER . Manuscript received July 7, 2017; final manuscript received July 11, 2017; published online October 3, 2017. Editor: David Wisler. 07 07 2017 11 07 2017 Energy systems Unsteady Vibration The development of advanced cycles based on gas turbine...

.... Furthermore, a loosely coupled procedure is developed to combine this enhanced flow solver with a solid conduction solver for solving unsteady conjugate heat transfer (CHT) problems for transient natural convection. This allows very large computational time-steps to be used without any stability issues...

.... , Hehle , M. , and Schäfer , O. , 2006 , “ Performance of Prefilming Airblast Atomizers in Unsteady Flow Conditions ,” ASME Paper No. GT2006-90432. 10.1115/GT2006-90432 [5] Gajan , P. , Strzelecki , A. , Platet , B. , Lecourt , R. , and Giuliani , F. , 2007...

... levels of cavity seal effectiveness. Unlike the double lip seal, the single lip seal is sensitive to overall Reynolds number, the addition of a simulated blade pressure field, and large-scale nonuniform ingestion. In the case of both seals, unsteady pressure variations attributed to shear layer...