...-mail:  thomas.bergs@ipt.fraunhofer.de 11 07 2022 27 07 2022 21 09 2022 milling blisk CAM digital twin process design optimization manufacturing simulation modeling turbomachinery In the past, the traditional chain of product (development) and process design (manufacturing...

...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...

...-mail:  sebastian.mayer@scai.fraunhofer.de e-mail:  thomas.bergs@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...

... 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...

...  −  ζ model, we choose an effective length of 10% of the transition duct length, which is a realistic value for swirl generators; the damping coefficient ζ is set to zero here, as we do not attempt any quantitative comparison with experimental data. The can length is set equal to the transition duct...

... 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...

... once the sonic valve gets unchoked following the filling up of the vacuum tank. The DuraVane Lubricated rotary vane vacuum pump, provided by Dekker Vacuum Technologies, is able to bring the pressure in the system down to 10 mbar. A quasi one-dimensional model of the facility was developed...

... 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...

... 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...

... 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...

... 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. National Natural Science Foundation of China...

... systems Engines Experimental Finite element Internal combustion engines Modeling Power Thermal Turbines Control systems Co- generation Hybridized and fully electrified boosting technologies have become increasingly popular in recent years. Engine-boosting provides advantages in terms...

.... 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. Experimental Flow induced vibration Fluids Modeling Flow induced noise Many...

...). A three-dimensional computational fluid dynamics (3D CFD) model was developed using CONVERGE CFD coupled with detailed chemical kinetics to gain a better understanding of the underlying phenomena of the water injection event in a homogeneous, low temperature combustion (LTC) strategy. The CFD model...

... and a virtual control system of IGHAT cycle is established on the Ovation distribution control platform. The model-in-loop control platform is eventually set up based on the interaction between the simulation model and the control system. A case study is implemented on this model-in-loop control platform...