... as well as turbomachinery efficiencies. The Virginia Tech team has been developing this seedless technique for simultaneous planar (or line) measurements to overcome the limitations associated with seed-based laser measurement techniques such as laser Doppler velocimetry (LDV), particle image velocimetry...

...-fidelity (HF) data. The prediction accuracy of MF-DNN was first evaluated using a 15-dimensional benchmark function. An affordable turbomachinery UQ platform was then built based on key components including the MF-DNN model, the sampling module, the parameterization module and the statistical processing...

...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...

... 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 unsteady flows Ministry of Education of the People's Republic of China...

... 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 Research Council 10.13039/501100000266 EP/L01680X...

...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...

... 2018, June 11–15, 2018, Oslo, Norway. Contributed by the International Gas Turbine Institute (IGTI) of ASME for publication in the J ournal of T urbomachinery . 03 10 2019 21 02 2020 21 02 2020 29 07 2020 turbomachinery compressors CFD manufacturing variations...

... 29 08 2019 29 08 2019 13 09 2019 throughflow model computational fluid dynamics (CFD) turbomachinery steam turbine upwind scheme Throughflow methods have been crucial components of industrial turbomachinery design systems since several decades. In the concept...

.... , and Imregun , M. , 1996 , “ A Review of Aeroelasticity Methods With Emphasis on Turbomachinery Applications ,” J. Fluid. Struct. , 10 , pp. 237 – 267 . 10.1006/jfls.1996.0015 [2] Hall , K. C. , Kielb , R. E. , Ekici , K. , Thomas , J. P. , and Clark , W. S. , 2005 , “ Recent...

... 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...

... 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...

...-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...

..., 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...

... of the circumferential nonuniformities into the meridional flow. Adamczyk , J. J. , 1984 , “ Model Equation for Simulating Flows in Multistage Turbomachinery ,” NASA-TM-86869. He , L. , and Ning , W. , 1998 , “ Efficient Approach for Analysis of Unsteady Viscous Flows in Turbomachines ,” AIAA...

...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. aerodynamics blades compressible flow elasticity fans turbomachinery In turbomachinery applications, flutter is usually associated with fan...

... or the worst farfield boundary condition (BC) implementation is used. The presented BC enhancements can be applied to structured, unstructured, cell-centered, and cell-vertex solvers. The conventional implementation of turbomachinery farfield boundary conditions based on either the flux enforcement...