A5049430970- Fluid Dynamics and Turbulent Flows
- Aerodynamics and Acoustics in Jet Flows
- Acoustic Wave Phenomena Research
- Heat Transfer Mechanisms
- Hearing Loss and Rehabilitation
- Noise Effects and Management
- Fluid Dynamics and Vibration Analysis
- Machine Fault Diagnosis Techniques
- Wind and Air Flow Studies
- Fault Detection and Control Systems
- Combustion and flame dynamics
- Structural Health Monitoring Techniques
- Speech and Audio Processing
- Plasma and Flow Control in Aerodynamics
- Wind Energy Research and Development
- Tribology and Lubrication Engineering
- Vibration and Dynamic Analysis
- Model Reduction and Neural Networks
- Gear and Bearing Dynamics Analysis
- Building Energy and Comfort Optimization
- Vehicle Noise and Vibration Control
- Mineral Processing and Grinding
- Social Acceptance of Renewable Energy
- Geotechnical Engineering and Underground Structures
- Music Technology and Sound Studies
La Rochelle Université
2016-2025
Laboratoire des Sciences de l'Ingénieur pour l'Environnement
2014-2025
Centre National de la Recherche Scientifique
2015-2025
Roche (France)
2016-2020
Université Le Havre Normandie
1995
Impinging jets are found in many industrial applications and specifically ventilation systems. Mostly, these turbulent under certain conditions can be a source of discomfort closed areas due to the high level noise it generates. Therefore, is very important understand flow dynamics that responsible generating acoustic field order control reduce such phenomenon. In this paper, an experimental study rectangular impinging air jet on slotted plate considered for three different Reynolds numbers...
A numerical model is proposed to predict the reverberant sound field in a system of two coupled volumes that are connected through an open aperture. The based on implementation diffusion has already been applied sound-energy distribution and decay single rooms. In comparison with statistical theory, approach permits prediction by taking into account source location receiver locations as well transition from one room other at coupling Moreover, results match satisfactorily experimental data...
The influence of the large-scale vortical structures on wall shear stress in a circular impinging jet is investigated experimentally for Reynolds number 1260. Time-resolved particle image velocimetry and polarographic measurements are performed simultaneously. It found that instantaneous strongly dependent vortex dynamics, particularly different parts transverse vortex. ring, secondary tertiary vortices ejection/sweep process near main mechanism involved variation. In region boundary layer...
The concept of a digital twin is increasingly appearing in industrial applications, including the field predictive maintenance. A virtual representation physical system containing all data available on site. This paper presents condition monitoring ventilation systems through approach. literature review regarding most popular faults covered. motor current signature analysis used this research to detect faults. further described. Then, based free body diagram and Newton’s second law,...
This paper presents a localized mechanical fault detection method using full adaptive permanent-magnet synchronous machine (PMSM) observer in d/q reference frame. It appears that the sensitivity of PMSM stator currents and rotor speed measurements is very low with regard to single faults. That why an amplification signatures frequency domain proposed by adjusting gains. To study influence gains on signatures, model first all linearized at operating point. Then, static gain, resonance,...
Supersonic Ejectors (SE) can be used to replace mechanical compressors in several industrial applications, including residential and commercial space heating/cooling water heating, distillation/desalination drying systems, among others. Since SE are thermally driven, the SE-based systems make direct use of many forms thermal energy waste heat, solar thermal, natural gas, or biogas, depending on emission targets, availability cost. In this paper, Computational Fluid Dynamics (CFD) has been...
Numerical simulations of the fluid flow around a small rotating vertical axis wind turbine are performed using time accurate Reynolds Averaged Navier Stokes (RANS) solver. A moving mesh technique is applied for simulation turbine. The RANS equations then formulated in ALE. All computations assuming 2D incompressible fully turbulent flow. Turbulence modelled by SST k/ω model Menter. Blade forces and torque obtained from solution integrating pressure shear stress over blade surface. expected...
Impinging jets are encountered in many industrial applications and suppression of the noise generated by these is great fundamental practical interest. The vortex dynamics interaction between vortical structures impinging wall should be understood order to control aero-acoustic coupling shear layer oscillation acoustic modes (self-sustained tones). In this study, a plane jet issuing from rectangular nozzle on plate considered for Re = 3900. sound pressure, vibration impinged spatial velocity...
In this paper, a modification of the diffusion model for room acoustics is proposed to account sound transmission between two rooms, source and an adjacent room, which are coupled through partition wall. A system equations, one each together with set boundary conditions, wall other walls obtained numerically solved. The modified validated by numerical comparisons statistical theory several coupled-room configurations varying coupling area surface, absorption coefficient volume room. An...
This paper presents an extension of a diffusion model for room acoustics to handle the atmospheric attenuation. phenomenon is critical at high frequencies and in large rooms obtain correct acoustic predictions. An additional term introduced equation as well constant, order take attenuation into account. The modified then compared with statistical theory cone-tracing software. Three typical room-acoustic configurations are investigated: proportionate room, long flat room. agrees (when...