New test facility for forced blade flutter research

Lepicovsky, J.; Šidlof, Petr; Šimurda, David; Štěpán, Martin; Luxa, Martin

doi:10.1063/5.0041990

Cited by 9 publications

(9 citation statements)

References 5 publications

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“…The test section, which has a width of 160 mm (along the blade span) and height 195 mm, was mounted to the suction-type high-speed modular wind tunnel stationed in the Laboratory of Internal Flows of the Institute of Thermomechanics of the Czech Academy of Sciences. The test section is described in more detail in [15]. Scheme of the wind tunnel is provided in Figure 8.…”

Section: Experimental Investigationmentioning

confidence: 99%

“…Among the leading world research laboratories are EPFL Lausanne in Switzerland [9,10], KTH Stockholm in Sweden [11][12][13], and the NASA Glenn Research Center in Cleveland, Ohio, USA [14]. A new experimental setup for controlled flutter testing was recently designed and will enter into full operation at the Institute of Thermomechanics of the Czech Academy of Sciences [15].…”

Section: Introductionmentioning

confidence: 99%

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Effects of a Single Blade Incidence Angle Offset on Adjacent Blades in a Linear Cascade

et al. 2021

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The paper presents a numerical and experimental investigation of the effect of incindence angle offset in a two-dimensional section of a flat blade cascade in a high-speed wind tunnel. The aim of the current work is tp determine the aerodynamic excitation forces and approximation of the unsteady blade-loading function using a quasi-stationary approach. The numerical simulations were performed with an in-house finite-volume code built on the top of the OpenFOAM framework. The experimental data were acquired for regimes corresponding to the numerical setup. The comparison of the computational and experimental results is shown for the static pressure distributions on three blades and upstream and downstream of the cascade. The plot of the aerodynamic moments acting on all five blades shows that the adjacent blades are significantly influenced by the angular offset of the middle blade.

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Section: Experimental Investigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of a Single Blade Incidence Angle Offset on Adjacent Blades in a Linear Cascade

et al. 2021

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“…The contribution is a follow-up to the ongoing research [5], [6] of blade flutter investigation where the assumption of that the dynamic component of the overall blade loading is considerably smaller than the level of the overall static loading component is adopted in order to substitute timedependent blade loadings by a series of static loadings for a range of blade incidence angle offsets. The experimental part of the research was carried on the new setup for controlled flutter testing operating at the Institute of Thermomechanics of the Czech Academy of Sciences [7]. Numerical computations were realized by finite-volume, in-house code developed on the top of open-source software package OpenFOAM.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Transonic Flow Through Linear Cascade with Single Blade Incidence Angle Offset

Fürst¹,

Musil²,

Šimurda³

2022

Topical Problems of Fluid Mechanics 2022

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The contribution deals with numerical and experimental investigation of the effect of incidence angle offset in a two-dimensional section of a flat linear blade cascade in a high-speed wind tunnel. The aim of the work is to complement ongoing research of quasi-stationary approximation of aerodynamic flutter by examination of setups leading to transonic flow regimes. The numerical simulations were realized by finite-volume, in-house code developed on top of the open-source software package OpenFOAM. The experiments were conducted in correspondence with the setting of numerical simulations. The comparison of experimental and numerical data is presented on the isentropic Mach number distributions at various locations in the blade cascade. The description of transonic flow structures in the vicinity of blades is also provided.

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“…Recently a test section for investigation of forced oscillation of blades in a compressor blade cascade operating at transonic regimes has been designed in frame of a cooperation between the Institute of Thermomechanics of the Czech Academy of Sciences (IT CAS) and Technical University of Liberec (TUL) [1]. The test section is mounted on the modular in-draft wind tunnel (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The tunnel facility (Fig. 2) consists of a silica gel dryer (1), bell mouth inlet (2) with honeycomb flow straighteners (3), Fig. 2.…”

Section: Introductionmentioning

confidence: 99%

CFD Investigation of the test facility for forced blade flutter research

et al. 2022

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With the increasing share of renewable power resources turbomachines need to be operated under a wider range of operating conditions including highly off-design regimes. Under such regimes an undesirable phenomenon of blade flutter might occur and possibly destroy the machine. To prevent this, intensive research is conducted by research teams worldwide. Blade flutter research program at the Institute of Thermomechanics of the Czech academy of sciences (IT CAS) mainly aims to advance experimental techniques for investigation of sonic and transonic blade flutter. For this purpose, the new sophisticated test facility was designed and manufactured. As part of the design process, the CFD computations were conducted in order to investigate the flow field in the test facility. This paper presents results of these computations with detailed analysis of flow structures occurring during the air flow through the stationary blade cascade.

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New test facility for forced blade flutter research

Cited by 9 publications

References 5 publications

Effects of a Single Blade Incidence Angle Offset on Adjacent Blades in a Linear Cascade

Effects of a Single Blade Incidence Angle Offset on Adjacent Blades in a Linear Cascade

Investigation of Transonic Flow Through Linear Cascade with Single Blade Incidence Angle Offset

CFD Investigation of the test facility for forced blade flutter research

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