...Dingxi Wang; Sen Zhang In this article, a new hybrid time and frequency domain method called the approximate time domain nonlinear harmonic method is proposed for a robust and efficient analysis of turbomachinery unsteady flow with more than one fundamental mode. The proposed method combines...

... in previous literature. The finalized model captures the experimental cylinder data found in literature much better than the previous model. These improvements also open the door for future models, such as that of a pitching airfoil or a turbomachinery blade, to create a preliminary design tool for studying...

...@nwpu.edu.cn Email: hhuang@nwpu.edu.cn Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 12 06 2021 16 08 2021 17 08 2021 27 09 2021 spectral method harmonic balance method turbomachinery wakes...

... . 18 09 2020 07 01 2021 07 01 2021 07 04 2021 turbomachinery erosion & deposition dust ingestion test CMAS sulfidation mineral dusts harsh environments measurement techniques turbine blade and measurement advancements Engineering and Physical Sciences...

...Huang Huang; Wei Liu; Paul Petrie-Repar; Dingxi Wang In this paper, a method for analyzing flutter for a turbomachinery row with aerodynamically coupled structural modes is presented. The majority of observed turbomachinery flutter incidents involve only one structural mode family due to high mass...

... and repair to avoid a reduction in performance. turbomachinery compressors CFD manufacturing variations fan compressor and turbine aerodynamic design 03 10 2019 21 02 2020 21 02 2020 29 07 2020 Contributed by the International Gas Turbine Institute (IGTI) of ASME...

...: claudio.bettini@ansaldoenergia.com Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 16 07 2019 29 08 2019 29 08 2019 13 09 2019 throughflow model computational fluid dynamics (CFD) turbomachinery...

... the flutter mechanisms directly related to shock wave properties and flow separation effects. It is found that the shock wave on the suction surface and the separation area behind it are important flutter inducements. turbomachinery flutter mechanism In the aeronautical industry, the trends...

... stratified flow turbomachinery vortices The clearance between blade tip and casing results in a leakage flow crossing the tip from the pressure side (PS) to the suction side (SS) of the blade. Vorticity transported by the leakage flow typically rolls up into unsteady vortical structures, making...

...-by-stage optimization strategy about the multistage turbomachinery optimization. Fourth, it introduces the visual analysis method into optimization, which can adjust variation ranges of variables by analyzing how great the variables influence the objective function. The above techniques were applied...

... with special regard to the prediction of flow turbulence under the rotational flow regime, which is typical of turbomachinery. Future work will include the investigation of buoyancy effects to the rotational flow. This implicates wall heating, which results from the heater glass in order to provide transparent...

..., if it is desired to resolve the y + < 100 zone (populated with fine, elongated streak—see later) at higher Re, the computational costs become severe. Figure 1 is similar to that shown by Piomelli and Balaras ( 17 ) and Leschziner ( 18 ) but here it is adapted for turbomachinery. It essentially...

...Paul Tucker; Simon Eastwood; Christian Klostermeier; Hao Xia; Prasun Ray; James Tyacke; William Dawes A hybrid large eddy simulation (LES) related technique is used to explore some key turbomachinery relevant flows. Near wall Reynolds-averaged Navier-Stokes (RANS) modeling is used to cover over...

...Kevin E. Turner; Michael Dunn; Corso Padova The turbomachinery industry continually struggles with the adverse effects of contact rubs between airfoils and casings. The key parameter controlling the severity of a given rub event is the contact load produced when the airfoil tips incur...

... 2011 31 05 2011 fluid mechanics Fourier series turbomachinery throughflow nonlinear harmonic method immersed boundary method circumferential stresses With the objective of unifying all models in turbomachinery and their corresponding assumptions, Adamczyk ( 1 ) proposed...

...Frédéric Sicot; Guillaume Dufour; Nicolas Gourdain In the absence of instabilities, the large deterministic scales of turbomachinery flows resulting from the periodic rotation of blades can be considered periodic in time. Such flows are not simulated with enough efficiency when using classical...

... occurs when both stall and acoustic flutters happen at the same speed. It is also found that blade stiffening has no effect on aero-acoustic flutter. 19 08 2009 28 10 2009 27 04 2011 27 04 2011 aerodynamics blades compressible flow elasticity fans turbomachinery...

... 07 2010 20 04 2011 20 04 2011 compressible flow computational fluid dynamics Navier-Stokes equations turbomachinery Fan, compressor, and turbine blades operate in annuli, which, in the majority of cases, are delimited by nonparallel end walls. The three-dimensional (3D...

... dynamics to an open rotor engine arise due to the removal of the casing that is present in conventional aero-engine turbomachinery. In this work, an advanced three-dimensional Navier–Stokes solver is applied to the open rotor. The approach needed to accurately capture the aerodynamics is investigated...

... 2009 12 11 2010 12 11 2010 aerodynamics compressors computational fluid dynamics flow instability mechanical engineering computing nozzles turbomachinery In view of recently rising primary energy costs and the demand to reduce the emission of greenhouse gases, new...