Forschungsbereich Aerodynamik und Akustik

Numerical Approaches: CFD, CAA and Optimization

Contacts

Eman Bagheri, M. Sc. Phone number: +49 9131 85-28291 Website:
Florian Wachter, M. Sc. Phone number: +49 9131 85-28272 Website:
Jörg Riedel, M. Sc. Phone number: +49 9131 85-29505 Website:
Andreas Renz, M. Sc. Phone number: +49 9131 85-29505

Main research areas

  • Computational Fluid Dynamics (CFD) Simulation
  • Computational Aeroacoustics (CAA) Simulation
  • Solver Development in OpenFOAM
  • Fluid-Structure-Acoustic Interaction
  • Discrete Adjoint Optimization
  • Machine Learning Algorithm
  • Multi-Phase Flow
  • Structure Vibration and Modal Analysis

Methods and techniques

  • Finite Volume and Finite Element Methods
  • Pertubated Convective Wave Equations
  • FW-H Methods
  • HPC Computing
  • LES and DNS
  • OpenFoam, StarCCM+, Ansys, SU2, FASTEST3D
  • Simcenter, CFTurbo
  • Psychoacoustic Analysis Program
  • Design Tool for Axial and Radial Impeller

Recent research topics

Selected former research

  • Virtual Vehicle: Simulation of Low-Frequency Vehicle Interior Noise with Wind Excitation
  • Virtual Vehicle: Aeroacoustic Simulation of Rotating Systems in HVAC Systems
  • Bayern-E-home – Optimization and Noise Reduction for Vertical Wind Turbine
  • EU-FET- EUNISION: Extensive UNIfied-domain SimulatiON of the human voice
  • Bavarian Research Alliance: Noise Reduction of Technical Facilities
  • EDA-CAPEM: Conformal Array Performance Estimation Modelling
  • INIFAU: Multiphysical Simulation Model for External Noise Prediction in the Early Development Phase of a Car

Selected Media 

Shape Optimization


Shape-optimized turbulent pipe flow DNS of the baseline and optimized geometries showing improved pressure loss as well as partial relaminarization

Axisymmetric Turbulent Boundary Layer

LES of axisymmetric turbulent boundary layer performed in OpenFOAM

Pulsating Heat Pipes

Simulation of pulsating heat pipes with heat transfer and phase-change using developed solver in OpenFOAM

Aeroacoustic Simulations

PCWE source term in rotating systems

Acoustic Wave propagation in rotating systems using the PCWE analogy

Acoustic Wave propagation in a HVAC unit using the PCWE analogy

Vibro-acoustic Simulation

Vibro-acoustic wave propagation of a cylinder head model simulated in CFS++

Simulation of Rotating Systems

 

PTV measurement of turbulent axisymmetric boundary layer/em>

Forward-Facing Step Benchmark Case

PIV measurement of turbulent flow in an optimized curved pipe

Measurement Techniques and Experimental Fluid Mechanics


Contacts
Felix Czwielong, M. Sc. Phone number: +49 9131 85-28272 Website:
Christoph Näger, M. Sc. Phone number: +49 9131 85-28291 Website:
Andreas Renz, M. Sc. Phone number: +49 9131 85-29505
Lukas Saur, M. Sc. Phone number: +49 9131 85-29505 Website:
Jörg Riedel, M. Sc. Phone number: +49 9131 85-29505 Website:

Main research areas

  • Acoustic Test Facilities
  • Hybrid Acoustic PIV
  • Vibro-Acoustic Measurements
  • Microphone Arrays
  • Flow-Acoustic Correlation
  • Flow Visualization
  • Inflight Acoustic Sensors
  • Active Turbulence Grid

Methods and techniques

  • LDA
  • PIV
  • Hot Wire Measurements
  • Laser Scanning Vibrometer
  • Multi-Pressure Systems
  • Kiel-probe Array
  • Smoke Generator
  • Telemetric System
  • Matches Index Refraction Technique
  • Aeroacoustic and Flow Test Facilities
  • Large Wind Tunnel
  • Water Tunnel

Recent research topics

Selected former research

  • Bayern-Green Factory – Design of Low Noise Production Facilities
  • Bayern-E-home – Optimization and Noise Reduction for Vertical Wind Turbines
  • EU FP7 – The Development and Verification of a Novel Modular Air Cooled Condenser for Enhanced Concentrated Solar Power Generation
  • Bavarian Research Alliance: Noise Reduction of Technical Facilities

Selected Media 

PIV/PTV

PTV measurement of turbulent axisymmetric boundary layer flow

 

PIV measurement of turbulent flow within a curved pipe optimized for pressure loss reduction

Turbomachinery

Contacts

Felix Czwielong, M. Sc. Phone number: +49 9131 85-28272 Website:
Andreas Renz, M. Sc. Phone number: +49 9131 85-29505
Lukas Saur, M. Sc. Phone number: +49 9131 85-29505 Website:
Jörg Riedel, M. Sc. Phone number: +49 9131 85-29505 Website:

Main research areas

  • Acoustic Test Facilities for Fans
  • Fan Acoustics
  • Turbocharger
  • Active Turbulence Grid
  • Fans by Different Installation Conditions
  • Optimization
  • Multi-Port Measurements
  • Scroll Compressor
  • Wind Turbines
  • Serrated Leading Edge Fan Design
  • Friction Ventilator

Methods and techniques

Recent research topics

Selected former research

  • BoschRexroth: Sound emission of low-pressure axial fans under distorted inflow conditions
  • GardnerDenver: Flow and Flow-Induced Sound Radiation of Side Channel Blowers
  • Bayern-E-home – Optimization and Noise Reduction for Vertical Wind Turbines
  • BFS: Aeroacoustic Sound Generation in Fans and their Sound Radiation
  • INIFAU: Sound Radiation of the Exhaust Gas Turbocharger as a Function of the Compressor and Turbine Inflow

Selected Media 

Simulation of Axial Fans

 

LES of an axial fan with and without leading edge serrations

Ventilations and Cooling Systems

Contacts

Felix Czwielong, M. Sc. Phone number: +49 9131 85-28272 Website:
Andreas Renz, M. Sc. Phone number: +49 9131 85-29505
Lukas Saur, M. Sc. Phone number: +49 9131 85-29505 Website:
Eman Bagheri, M. Sc. Phone number: +49 9131 85-28291 Website:

Main research areas

  • Pulsating Heat Pumps
  • Heat Exchanger and Fan Installations
  • Psychoacoustics
  • HCAC Systems
  • Motor Cooling Systems

Methods and techniques

  • CFD /CAA
  • Multi-Pressure Systems
  • Telemetric System
  • Aeroacoustic and Flow Test Facilities
  • Multi-Phase Simulation

Recent research topics

Selected former research

  • INIFAU: Aeroacoustic Noise Prediction of Automotive HVAC Systems
  • INIFAU: Development of a Methodology for the Design of Vehicle Air Conditioning Systems under Consideration of Psychoacoustic
  • BFS: Noise reduction of the ventilation systems of low-energy/passive houses
  • BFS : Noise reduction of the cooling equipment of technical systems and devices
  • Brose: Acoustics of Motor Cooling Fans

Selected Media 

Sound Absorption Technology

Contacts

Felix Czwielong, M. Sc. Phone number: +49 9131 85-28272 Website:
Jörg Riedel, M. Sc. Phone number: +49 9131 85-29505 Website:

Main research areas

  • Acoustic Metamaterials
  • MPP
  • Resonator
  • Porous Materials
  • Absorber in Flow Systems
  • Kevlar Foils

Methods and techniques

  • MPP
  • Hot Wire Measurements
  • Multi-Port Test Rigs
  • Multi-Pressure Systems

Recent research topics

  • AiF Research Project (20997 N/1): Sound Measurement of Axial Fans in Pipes
  • BMBF: AKUMET3D: Acoustical Metamaterials for Sound Absorption in Pipes

Selected former research

  • Bayern-Green Factory – Design of Low Noise Production Facilities
  • AIF/ZIM: Turbo Resonator for Compressors
  • FLT: Application of Kevlar foils for minimizing the influence of fluid mechanical pressures during acoustic measurements with slot tube probes on fans
  • Schmalz: Development of a silencer for vacuum technology components

Car Acoustics and Flight Systems

Contacts

apl. Prof. Dr.-Ing. habil. Stefan Becker Phone number: +49 9131 85-29579 Website:

Main research areas

  • Fluid-Structure-Acoustic Interaction
  • Vibro-Acoustic Measurements
  • Inflight Acoustic Sensors
  • Low Noise Drone Flight
  • Active Flow Control
  • Acoustics of E-Bikes

Methods and techniques

Recent research topics

  • AkESoFlug: Energy-efficient, acoustically self-optimized drive technology for autonomous aviation

Selected former research

  • BFS – Sound design for Passenger Car Interiors
  • Virtual Vehicle: Simulation of Low-Frequency Vehicle Interior Noise with Wind Excitation
  • INIFAU: Multiphysical Simulation Model for External Noise Prediction in the Early Development Phase of a Car
  • DFG: Inflight Transition Measurements on an Airplane Wing using LDA
  • VW: Active Flow Control on a 1:4 Car Model

Selected Media

Simplified Car Model

LES of flow around side-view mirror

Aero-Vibro-Acoustic Simulation of the Flow Induced Interior Noise in a Simplified Car

 

Vibro-acoustics of Car Engines

Vibro-acoustic wave propagation of a cylinder head model simulated in CFS++

Medical Technology

Contacts

Christoph Näger, M. Sc. Phone number: +49 9131 85-28291 Website:
Jörg Riedel, M. Sc. Phone number: +49 9131 85-29505 Website:

Main research areas

Methods and techniques

  • PIV
  • Laser Scanning Vibrometer
  • Multi-Pressure Systems
  • Laser Scanning Vibrometer
  • Artificial Vocal Folds

Recent research topics

Selected former research

  • DFG: The flow-structure interaction and the induced sound on a realistic physical vocal fold model – active model
  • EU-FET- EUNISION: Extensive UNIfied-domain SimulatiON of the human voice
  • University Hospital: Investigation of the influence of an internal fixator on stiffness in the pelvic ring and sacral fractures
  • University Hospital: CFD investigations of medical cement on a bone screw

Selected Media 

Voice Research

PIV measurement of a modulating jet induced by synthetic vocal folds

 

Laser-scanning vibrometry of synthetic vocal folds