Optimisation by behaviour modelling of a protective porous material

Bounazef, Mokhtar; Djeffal, Ali; Serier, Mohamed; Bedia, E.A. Adda

doi:10.1016/j.commatsci.2008.06.022

Cited by 7 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…20 Dominance conditions of any of these mechanisms are typically plotted on a wear map, allowing wear prediction for non-tested values of relative blade/seal penetration and speed. 21,22 On the existing rigs, loading at the blade/seal interaction is not yet characterised at a representative blade/seal relative interaction speed. Rig experiments have been performed at up to 100 m/s relative tangential speed, but the interaction configuration was simplified into the orthogonal cutting component and the blade replaced by a rigid tool.…”

Section: Abradable Wearmentioning

confidence: 99%

“…20 Dominance conditions of any of these mechanisms are typically plotted on a wear map, allowing wear prediction for non-tested values of relative blade/seal penetration and speed. 21,22…”

Section: State-of-the-artmentioning

confidence: 99%

“…Abradable seals are used in aeronautical compressors and turbines as a way to increase the jet engine efficiency and safety by limiting leakage flows occurring in the gap located between rotating blade tips and stationary parts. 1 But smaller dynamic clearances lead to more frequent blade/casing interactions. 2 Therefore, abradable seals are empirically designed not only to withstand the in-service environmental conditions but also to dislocate when penetrated by the tips of rotor blades.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation of the blade/seal interaction

Baiz

Fabis

Boidin

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

International audienceThe use of dynamic seals to reduce the rotor/stator dynamic clearance in jet engine compressor stages leads to a higher rubbing occurrence between each blade and the coated inside of the casing. This article describes the development of a test rig capable to investigate forces and wear at the dynamic blade/seal interaction, in conjunction with blade kinetics. Testing conditions are consistent with those of low-pressure compressor stages of jet engines: high-speed rubbing occurs between a TA6V blade substitute and an aluminium-silicon/boron nitride abradable seal. The platform is instrumented to allow a dynamic measurement of forces and displacements as well as high-speed imaging of the blade/seal interaction zone throughout the experiment. The experiments showed that the blade incursion speed and penetration depth in the abradable seal both affect the amplitude and frequency of blade vibration. The amount and severity of blade incursions into the abradable seal have an impact on seal wear type and intensity, which can in turn increase blade excitation

show abstract

Section: Abradable Wearmentioning

confidence: 99%

“…20 Dominance conditions of any of these mechanisms are typically plotted on a wear map, allowing wear prediction for non-tested values of relative blade/seal penetration and speed. 21,22…”

Section: State-of-the-artmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental investigation of the blade/seal interaction

Baiz

Fabis

Boidin

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part J:

View full text Add to dashboard Cite

show abstract

“…Experimentally investigated the radiation efficiency of methane and air combustion for mixture richness from 0.6 to 0.87. The burner used was zirconia (with preheating region (RP) of 65 ppi, the porosity of 87% and 3.5 cm in lengthflame stabilization region (REC) of 10 ppi, the porosity of 84% and 2.55 cm height), 51 mm in diameter and 60.5 mm in length [35][36][37][38].…”

Section: Methodsmentioning

confidence: 99%

Experimental Assessment of Thermal Radiation Behavior Emitted by Solid Porous Material

Caetano¹,

Lorenzini²,

Lhamby³

et al. 2020

IJHT

View full text Add to dashboard Cite

Porous media burners have been the focus of many studies due to the advantage in different applications in industry, which exhibit a directional emission of thermal radiation and low emission of pollutants. Indeed, these characteristics yields benefits regarding productivity by an environment friendly process. Thus, this work analyzes the behavior of radiation heat flux emitted by materials of different linear densities and porosities, varying the rate of air/fuel mixture and the flame power. In this way, was constructed an experimental setup that consists in a supply system of air/fuel, data acquisition, burner support for the radiation sensor, and the radiometer. This structure enables the displacement from 0°C to 90°C allowing the analysis of radiation in the area of a semisphere. The results shown that the silicon carbide has higher radiation efficiency than zirconia, due the higher thermal conductivity and emissivity. However, the silicon carbide degraded in one of the measurements. The ZrO2 media has proved challenging to stabilize for equivalence ratios below 0.6. Regarding the porosity, it is concluded that the higher the porosity, the greater the radiation efficiency, the expected result because there is a larger contact area for the reaction to occur within the pores.

show abstract

“…The method allows a rapid interpretation by giving an accurate experimental model of the system under study 7,8 .…”

Section: Design Of Experimentsmentioning

confidence: 99%

Analysis of parameters effects on crack breathing and propagation in shaft of rotor dynamic systems

Serier¹,

Lousdad²,

Refassi³

et al. 2013

Mat. Res.

View full text Add to dashboard Cite

In this paper the design of experiment method is used to investigate and explain the effects of the rotor parameters on crack breathing and propagation in the shaft. Three factors are considered which have an influence on the behavior and the propagation of the crack: the rotational speed, the length of the rotor and the diameter of the shaft. The elaborated mathematical model allows determining the effects and interaction of speed, diameter and length on crack breathing mechanism.The model also determines the optimal values of the parameters to achieve high performance.

show abstract

Optimisation by behaviour modelling of a protective porous material

Cited by 7 publications

References 3 publications

Experimental investigation of the blade/seal interaction

Experimental investigation of the blade/seal interaction

Experimental Assessment of Thermal Radiation Behavior Emitted by Solid Porous Material

Analysis of parameters effects on crack breathing and propagation in shaft of rotor dynamic systems

Contact Info

Product

Resources

About