Withdrawal: CFD Simulation of Ground Vortex Formation of Jet Engine air intake

2018 ◽  
Author(s):  
Rasoul Askari ◽  
Shahin Jamali Asl ◽  
Mohammad Hadi Katooli ◽  
Mohammad Reza Soltani
Keyword(s):  
Cfd Simulation ◽  
Vortex Formation ◽  
Jet Engine ◽  
Air Intake

CFD Simulation of Ground Vortex Formation of Jet Engine air intake

2018 ◽  
Author(s):  
Rasoul Askari ◽  
Shahin Jamali Asl ◽  
Mohammad Hadi Katooli ◽  
Mohammad Reza Soltani
Keyword(s):  
Cfd Simulation ◽  
Vortex Formation ◽  
Jet Engine ◽  
Air Intake

Prediction of the Acoustic Reflection in a Realistic Aeroengine Intake With Three Numerical Methods to Analyze Fan Flutter

2020 ◽  
Author(s):  
Thomas Bontemps ◽  
Stéphane Aubert ◽  
Maxime de Pret
Keyword(s):  
Analytical Model ◽  
Design Process ◽  
Cfd Simulation ◽  
Computational Cost ◽  
Fidelity Level ◽  
Acoustic Reflection ◽  
Acoustic Coupling ◽  
Air Intake ◽  
Operating Points ◽  
Do So

Abstract For a particular range of frequencies, an acoustic coupling between the fan and the air intake can modify fan stability regarding flutter. Previous works have shown that characterizing the reflection on the intake opening might be a crucial element to target operating points for which the risk of acoustic driven flutter is high. To do so, three methodologies are compared in this paper: an aeroelastic CFD simulation, an acoustic potential simulation and an analytical model. Each of them has a different fidelity level and computational cost, what makes their usage more beneficial at some step in the design process. It is shown that results of aeroelastic CFD and acoustic potential simulations are in excellent agreement. Fast acoustic simulations are then a good option in the early design process. The analytical model presents an important error mainly on the phase, and should be adapted before usage.

scholarly journals Double cylinder forming by die-less shear spinning for air intake lip skin of aero jet engine nacelle

2018 ◽  
Vol 15 ◽  
pp. 1270-1277 ◽  
Author(s):  
Nobuyuki Suzuki ◽  
Satoshi Tokuhiro ◽  
Osamu Takeuchi
Keyword(s):  
Jet Engine ◽  
Air Intake ◽  
Shear Spinning ◽  
Engine Nacelle

Design and CFD simulation of triple swirler in jet engine

2022 ◽  
Author(s):  
P. R. Mehta ◽  
K. M. Patil ◽  
S. R. Parab ◽  
P. R. Patel ◽  
R. V. Kale
Keyword(s):  
Cfd Simulation ◽  
Jet Engine

LES of the Flow and Particle Ingestion Into an Air Intake of a Jet Engine Running on the Ground

2004 ◽  
Author(s):  
Dragos Moroianu ◽  
Arne Karsllon ◽  
Laszlo Fuchs
Keyword(s):  
Flow Field ◽  
Vortex System ◽  
Compressor Blades ◽  
Mean Velocity ◽  
Jet Engine ◽  
Large Eddy ◽  
Air Intake ◽  
Ground Effects ◽  
Particle Ingestion ◽  
Good Agreement

The flow field generated by the flow into a jet engine air-intake, with near ground effects, is considered. The axial inflow in the neighborhood of the ground generates a system of unsteady vortices. Some of these vortices extend from the air-intake towards the ground. Some of these vortices are strong enough to dislocate and even lift small objects from the ground up to the air-intake. The dynamics of the vortex system makes it difficult to study the problem by standard numerical and experimental methods. The dynamics of the vortices can be captured by using Large Eddy Simulations (LES), which is used here to enhance the understanding of the dynamics of the flow field. The computed flow field is used also to assess the ingestion of particles into the air-intake. It is shown that particles of several mm sizes can be ingested into the jet engine. This in turn may result in enhanced erosion of the compressor blades. The results of the computations in terms of mean velocity field have been compared to experimental data. These results are in good agreement with the experiments.

Prediction of the Acoustic Reflection in a Realistic Aeroengine Intake With Three Numerical Methods to Analyze Fan Flutter

2021 ◽  
pp. 1-20
Author(s):  
Thomas Bontemps ◽  
Stephane Aubert ◽  
Maxime de Pret
Keyword(s):  
Analytical Model ◽  
Design Process ◽  
Cfd Simulation ◽  
Computational Cost ◽  
Fidelity Level ◽  
Acoustic Reflection ◽  
Acoustic Coupling ◽  
Air Intake ◽  
Operating Points ◽  
Do So

Abstract For a particular range of frequencies, an acoustic coupling between the fan and the air intake can modify fan stability regarding flutter. Previous works have shown that characterizing the reflection on the intake opening might be a cru- cial element to target operating points for which the risk of acoustic driven flutter is high. To do so, three methodologies are compared in this paper: an aeroelastic CFD simulation, an acoustic potential simulation and an analytical model. Each of them has a different fidelity level and computational cost, what makes their usage more beneficial at some step in the design process. It is shown that results of aeroelastic CFD and acoustic potential simulations are in excellent agreement. Fast acoustic simulations are then a good option in the early design process. The analytical model presents an important error mainly on the phase, and should be adapted before usage.

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