Unsteady flow
Control of the unsteady flow in a stator blade row interacting with upstream moving wakes
... The unsteady flow features over the suction surface can be adequately represented by linearized perturbation calculations, where the disturbance flow associated with t[r] ...
197
Analysis of the Unsteady Flow Field in a Centrifugal Compressor from Peak Efficiency to Near Stall with Full-Annulus Simulations
... the flow structure when the operating point moves from peak efficiency to near ...of unsteady three-dimensional simulations, in a calculation domain comprising all the ...and unsteady flow ...
12
Control of the unsteady flow in a stator blade row interacting with upstream moving wakes
... The unsteady flow features over the suction surface can be adequately represented by linearized perturbation calculations, where the disturbance flow associated with t[r] ...
196
Spectral discretization of an unsteady flow through a porous solid
... u| t=0 = u 0 on Ω, (1.1) where the unknowns are the velocity u and pressure p of the fluid. This system models the unsteady flow of an incompressible viscous fluid in a saturated rigid porous medium, in the ...
28
Parametric optimization of pulsating jets in unsteady flow by Multiple-Gradient Descent Algorithm (MGDA)
... the unsteady-flow simulation, and second, it is necessary to consider several objectives ...of unsteady flows, due to the backward integration of the adjoint equation, which requires the storage, or ...
18
Validation of an unsteady flow numerical model for sediment transport induced by flushing operation in combined sewers
... Very recently, Shahsavari et al. (2017) have shown the results of field experiments aimed at investigating the impact of a single flush on the sediment bed of a combined sewer trunk in the municipality of Paris. The ...
5
Unsteady flow field in a mini VAWT with relative rotation blades: analysis of temporal results
... [2] Bayeul-Lainé A. C., Dockter A., Bois G., Simonet S., 2011 6-9 July, Numerical simulation in vertical wind axis turbine with pitch controlled blades, IC-EpsMsO, 4 th , (Athens, Greece), pp 429-436 ISBN ...
8
A New Water Level Measurement Method Combining Infrared Sensors and Floats for Applications on Laboratory Scale Channel under Unsteady Flow Regime
... an unsteady flow regime in an experimental channel (4 m in length; 3 cm in ...sharp flow signals, as well as highly dynamic variations of water surface ...
18
Characterization of unsteady flow behavior by linear stability analysis
... a flow. When the need for flow characterization goes beyond a single point, it is possible to use arrays of sensors, but this has material limitations toward the spatial extent and resolution of the ...
150
Unsteady flow in a rotated square tube bank
... This paper discusses the results of a numerical study of transient flow in a rotated square tube bank with pitch-to-diameter ratio 2:1, in the range 30 ≤ Re ≤ 3000. Both stimulated and spontaneously-induced ...
14
Experimental analysis of the pressure–velocity correlations of external unsteady flow over rocket launchers
... zero contribution to F 1 and F 2 loads. In a similar way, residual modes give a contribution to both F 1 and F 2 . Thus, the application of Proper Orthogonal Decomposition to the wall pressure field has highlighted that ...
12
Image registration algorithm for molecular tagging velocimetry applied to unsteady flow in Hele-Shaw cell
... We finally consider a volumetric im- age formation model based on the fact that pixel intensities result from an integral measurement of the concentration of tracer in the corresponding v[r] ...
9
Description of the unsteady flow pattern from peak efficiency to near surge in subsonic centrifugal compressor stage
... mass flow rates with an acceptable efficiency. At low mass flow rates, where generally the maximum pressure ratio is reached, the compressor system sta- bility is limited by the onset of instability known ...
12
Detailed time resolved measurements and analysis of unsteady flow in a transonic compressor
... Radius Ratio 3.2.A Frequency Spectrum of Total & Static Pressure Ratio 3.2.B Frequency Spectrum of Tangential & Radial Flow Angle 3.2.C Frequency Spectrum of Total[r] ...
121
Stochastic reduced order model for real-time unsteady flow estimation
... Reference (DNS) 10 & degrees of freedom Our method (Red-LUM- based data- assimilation) 6 degrees of freedom Theoretical bound (optimal from 6-d.o.f. linear decomposition) 6 degr[r] ...
23
Characterization of unsteady flow processes in a centrifugal compressor stage
... Case 10: P' Figure 6-14 Contours of Mach number and P', showing the effect of mean flow Mach number on the spatial distribution of the static pressure disturbance. The higher Mach number in case 10 decreases the ...
137
Computational simulation of unsteady flow in transonic compressor rotor
... Consequently, a steady state approximation to the Navier-Stokes equations will never fully converge, the error locations being predominantly near the shedding location[r] ...
131
Spectral analysis of unsteady flow simulation in a small VAWT
... The aim of previous studies presented in 2010 (Bayeul- Lainé A.C. and al [2-3]) was to give some numerical results like contours of pressure, velocity fields and power coefficients, compared to relative steady blades for ...
10
Unsteady Mhd Flow Along Exponentially Accelerated Vertical Flat Surface Through Porous Medium With Variable Temperature And Hall Current In A Roatating System
... an unsteady flow along an accelerated non-conducting vertical flat surface of infinite extent with heat source and radiation through a porous medium in a rotating ...the flow field are analysed and ...
13
Unsteady simulation of flow in micro vertical axis wind turbine
... high unsteady flow for high angle (-30 and 30 degrees) and a relatively small power coefficient but, on the contrary, results for angle of 0 and 15 degrees are very good : a good periodicity is observed and ...
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