...A. Ballotti; S. Castellani; A. Andreini In this study, a dynamic thickening strategy for dynamic thickened flame model for large eddy simulations (DTFLES) application to multi-regime combustion is proposed. The main idea lies in using the numerical solution of an ordinary differential equation (ODE...

... pressure as an input, as well as the identification of numerous model parameters. These requirements render such an approach impractical. In this study, the authors have developed a thermodynamic model of piston surface temperature based on the global energy balance (GEB) methodology, which includes...

... , M. , and Jawahir , I. S. , 2013 , “ Recent Advances in Modelling of Metal Machining Processes ,” CIRP Ann. , 62 ( 2 ), pp. 695 – 718 . 10.1016/j.cirp.2013.05.006 [4] Ganser , P. , Landwehr , M. , Schiller , S. , Vahl , C. , Mayer , S...

...Fatih Aktas With developing in computer technology, three-dimensional (3D) computational fluid dynamics (CFD) internal combustion (IC) engine simulations, which generally use reduced chemical kinetic mechanisms and simplified combustion models, can provide more accurate results along with less...

...Astrid Ramirez Hernandez; Trupti Kathrotia; Torsten Methling; Marina Braun-Unkhoff; Uwe Riedel The development of advanced reaction models to predict pollutant emissions in aero-engine combustors usually relies on surrogate formulations of a specific jet fuel for mimicking its chemical composition...

...@ipt.fraunhofer.de 20 07 2021 21 07 2021 20 10 2021 milling blisk CAD CAM CAE digital twin digital environment exploration facilitated variation manufacturing variations modeling turbomachinery Fraunhofer-Gesellschaft 10.13039/501100003185 Fraunhofer Lighthouse...

... the deviation during off-design conditions. Conversely in the vaneless diffuser, the conservation of the angular momentum of the flow stream has been imposed in the tangential direction and then combined with the solution of the momentum equation in the radial direction. The model has been validated against...

...Luca Menegozzo; Ernesto Benini The present paper focuses on the numerical modeling approaches adopted in boundary layer ingestion (BLI) studies. Three driving aircraft concepts have been identified, namely propulsive fuselage concept (PFC), rear engines concept (REC), and distributed fans concept...

... ,” J. Fluid Mech. , 656 , pp. 5 – 28 . 10.1017/S0022112010001217 [8] Mezić , I. , 2005 , “ Spectral Properties of Dynamical Systems, Model Reduction and Decompositions ,” Nonlinear Dyn. , 41 ( 1–3 ), pp. 309 – 325 . 10.1007/s11071-005-2824-x [9] Schmid , P. J. , Li , L...

... LP-EGR models are designed with various combustion parameters (CP), which are derived from (1) heat release analysis, (2) central moment calculation, and (3) principal component analysis (PCA). The heat release provides valuable insights into the combustion process, such as flame speed and energy...

... labyrinth seal will be presented. The results in terms of rotordynamic coefficients and leakage will be discussed as well as the critical assessment of the experimental measurements. Eventually, the experimental data are compared to the numerical results obtained with the new bulk-flow model (BFM...

... 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...

... of the fluid entrained into the rotor boundary layer. A theoretical model has been developed to predict the relationship between the sealing effectiveness on the stator and the adiabatic effectiveness on the rotor, including the effects of both ingress and frictional heating. The model involves the use...

.... 10.2514/6.2017-4965 [12] Casella , F. , Otter , M. , Proelss , K. , Richter , C. , and Tummescheit , H. , 2006 , “ The Modelica Fluid and Media Library for Modeling of Incompressible and Compressible Thermo-Fluid Pipe Networks ,” International Modelica Conference , Vienna...

... near the critical point, the computational fluid dynamics (CFD) flow solver is coupled with a look-up table of properties of fluid. Behavior of real gas close to its critical point and the effect of the accuracy of the real gas model on the compressor performance are studied in this paper...

...Huangwei Zhang Large eddy simulation (LES) with three-dimensional conditional moment closure (CMC) subgrid model for combustion is applied to simulate a swirl-stabilized nonpremixed methane flame with localized extinction, with special focus on the effects of heat loss to the burner surface...

... conditions. An analytical model is developed based on the linearized G-equation, to further understand the flame interactions through the velocity perturbations in the burnt side. Good agreements were found between the prediction and the experiment results. 1 Corresponding author. Contributed...

... velocity is modeled and calculated. Then the seal dynamic model and response of inlet valve are presented followed by the machine thermodynamic model. A case study has also been presented to show the responses of seals and inlet valve during the machine operation. Contributed by the Structures...

... [10] Jain , A. , Nueesch , T. , Naegele , C. , Lassus , P. , and Onder , C. , 2016 , “ Modeling and Control of a Hybrid Vehicle With an Electrically Assisted Turbocharger ,” IEEE Trans. Veh. Tech. , 65 ( 6 ), pp. 4344 – 4358 . 10.1109/TVT.2016.2533585 [11] Michon , M...

.... A discussion on the possible sources of this SSV including self-excited instability and pad flutter forced vibration is provided with supporting evidence from thermoelastohydrodynamic (TEHD) bearing modeling results. 1 Corresponding author. 2 Present address: Rotor Bearing Solutions International...