... using X-ray computed tomography scan technique. The computational modeling involved explicit dynamic finite element (FE) simulation of the impact process wherein either delamination mechanism is modeled or both ply damage and delamination mechanisms are modeled in a coupled manner. The delamination...

... 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...

... velocity of 43 m/s, a pressure drop of 900 Pa (0.13 psi) was observed. The pressure drop data were validated by benchtop flow testing. Fig. 13 FEA analysis of IMA housing showing stress contours (left) and FoS contours (right) Finite element analysis (FEA) was used to ensure the stress...

... of the FCM method on a multistage system that is tuned and, for the first time, creates a multistage ROM with large mistuning using only sector-level quantities and calculations. The results of the multistage ROM for the tuned and large mistuning cases are compared with full finite element results...

...Lidui Wei; Haijun Wei; Haiping Du; Shulin Duan To predict the vibration characteristics of the crankshaft of the larger marine diesel engine accurately and comprehensively, based on the finite element models of the crankshaft and the engine block reduced by a component mode synthesis (CMS) method...

...; published online January 17, 2018. Editor: David Wisler. 25 08 2017 25 09 2017 Equilibrium Finite element Finite element methods Fluids Modeling Structural dynamics Vibration Electric submersible pumps (ESPs) are widely used in oil production as dynamic pumps...

... triangular finite elements for unstructured meshes. The investigated geometry is an industrial, two-staged, counter-rotative, fuel injection system. LSA is based on the mean flow obtained from large eddy simulations (LES), which also provide the mode shapes and frequencies of the PVC. The predicted wave...

... bearing in the role of a CB. This paper develops a coupled two-dimensional (2D) elastic deformation—heat transfer finite element model of the sleeve bearing acting as a CB. A coulomb friction model is used to model the friction force between the rotor and the sleeve bearing. The contact force and 2D...

..., 2017; published online September 19, 2017. Editor: David Wisler. 02 07 2017 05 07 2017 Film Finite element Gas turbine technology Structural dynamics Squeeze film dampers (SFDs) are fluid film mechanical elements that provide viscous damping to mechanical systems. SFDs...

... FOR G AS T URBINES AND P OWER . Manuscript received July 3, 2017; final manuscript received July 11, 2017; published online September 19, 2017. Editor: David Wisler. 03 07 2017 11 07 2017 Finite element Finite element methods Heat transfer Solar thermal power Thermal Turbines...

... undamaged. At the higher load, the TBC formed vertical cracks which relieved the stresses in the TBC and retarded delamination damage. A finite element (FE) analysis was used to establish a likely vertical crack configuration (spacing and depth), and it could be confirmed that the corresponding stress drop...

... Combustion Instability Modes and Frequencies ,” ASME Paper No. GT2010-23104. 10.1115/GT2010-23104 [24] Campa , G. , and Camporeale , S. , 2012 , “ Eigenmode Analysis of the Thermoacoustic Combustion Instabilities Using a Hybrid Technique Based on the Finite Element Method and the Transfer...

...Valentina Futoryanova One of the common failure modes of the diesel-engine turbochargers is the high-cycle fatigue (HCF) of the turbine-wheel blades. Mistuning of the blades due to the casting process is believed to contribute to this failure mode. Currently available commercial finite-element...

... Wisler. 29 08 2016 02 09 2016 Design optimization Energy Finite element Friction Petroleum engineering Power systems Swirling Vibration Wear In 2014, Childs et al. [ 1 ] presented lateral rotordynamic predictions for a 20 cm impeller diameter electric submersible pump...

... element Finite element methods Structural dynamics Unsteady Unsteady flows Vibration The variation in the blisk response when subjected to unsteady aerodynamic excitation forces is what highlights the importance of studying mistuning. The level of mistuning has a direct impact...

... Computational fluid dynamics Cooling Experimental Finite element The emission limits for minority species (especially nitric oxides (NO x ) and also carbon monoxide (CO), unburned hydrocarbons (UHC), and soot) are lowered more and more by the International Civil Aviation Organization. Carbon dioxide...

...Jishen Jiang; Bingqian Xu; Weizhe Wang; Richard Amankwa Adjei; Xiaofeng Zhao; Yingzheng Liu Finite element simulations based on an interface cohesive zone model (CZM) have been developed to mimic the interfacial cracking behavior between the α − Al 2 O 3 thermally grown oxide (TGO) and the aluminum...

...-of-the-art ROMs are based on large-scale three-dimensional finite element (FE) models. According to [ 3 ], one can distinguish two different classes of ROMs, namely, the ROMs based on component mode synthesis (CMS) methods and the ROMs based on system modes (SM) methods. The CMS-based ROMs allow a direct...

...Lingnan Hu; Alan Palazzolo The authors present an improved modeling approach to analyze the coupled rotor-support dynamics by modeling the rotor with solid finite elements (FEs) and utilizing multiple-input and multiple-output transfer functions (TFs) to represent the flexible support. A state...

...Dibesh D. Joshi; Frank K. Lu A general, dynamical approach developed a high-fidelity, finite element model of a pulse detonation engine (PDE). The approach deconvolved the structural response due to cyclic acceleration that would be measured by a load cell, thereby obtaining the actual thrust...