Thermo-Fluid Dynamics Group at TUM
Thermo-Fluid Dynamics Group at TUM
  • Видео 26
  • Просмотров 6 722
NoiSI Dissertation Research Alexander Eder
Presentation of Alexander Eder's dissertation research, given on 4th Nov. 2024 on the occasion of the defense of the dissertation.
Alexander defended "Summa cum lauda", i.e. with distinction. Thanks to Andrea Giusti (Imperial Collage London) and Bruno Schuermans (Schuermans Science / TU Berlin) for serving as external examiners. Harald Klein chaired the defense.
The objective of Alexander’s research was to model and analyse flame dynamics and thermoacoustic interactions in technically relevant configurations, particularly partially premixed combustors. Techniques for post-processing measurement date were developed to enable a consistent prediction of flame dynamics. High-fidelity simulati...
Просмотров: 196

Видео

ROLEX - Dissertation Research Matthias Haeringer
Просмотров 2753 месяца назад
Presentation of Matthias Häringer's dissertation research, given originally on the occasion of his Ph.D. defense on August 30th, 2024. The presentation summarizes the results of the ROLEX project (Hybrid Reduced Order / LES Models of self-eXcited Combustion Instabilities in Multi-Burner Systems). DOIs of related papers are 10.1115/1.4044869, 10.1177/17568277221085953, 10.1115/1.4048642, 10.1063...
taXTutorial Video1
Просмотров 5162 года назад
taX - Tuturial 1 taX is a Low Order Network Model for Thermoacoustic Instabilities
taXTutorial Video8
Просмотров 1222 года назад
[taX tutorial] 8 - Create new elements in the library 00:00 Create a new class 03:00 A new element in the library 04:19 Mask: define icon and ports 07:43 Mask: parameter and dialog 12:37 Mask: initialization 15:00 Conclusion
taXTutorial Video7
Просмотров 1582 года назад
[taX tutorial] 7 - Parameter study 00:00 Function changeParam 05:25 Introduction to the concept of cycle increment 08:00 What is wrong with the results? 09:37 Be careful with your modeling assumptions! 15:15 Function parameterStudy
taXTutorial Video6
Просмотров 1972 года назад
[taX tutorial] 6 - Scattering matrices 00:00 Extract a scattering matrix from a model 02:35 Extract an equivalent reflection coefficient 03:55 Build and impose a scattering matrix in your system
taXTutorial Video5
Просмотров 2842 года назад
[taX tutorial] 5 - Flame modeling 00:00 Thermodynamics parameters of the flame 04:20 Flame Transfer Function with n-tau model 06:15 FTF with the G-equation 07:15 General FTF model 08:15 Build an FTF from a measured FFR 11:15 Unit Impulse Response and FTF from CFD/SI
taXTutorial Video4
Просмотров 1782 года назад
[taX tutorial] 4 - Typical error messages and how to debug your model 00:00 Mean flow errors in longitudinal systems 08:40 Problems with T-junctions and mean flow 16:45 Problem with cross-sectional area 20:15 Summary
taXTutorial Video3
Просмотров 2632 года назад
Tutorial 3 - Create a first network model 00:00 Model setup 05:58 Analyze a taX model and extract information 14:05 Post-processing routines
taXTutorial Video2
Просмотров 2262 года назад
taX - Tuturial 2 taX is a Low Order Network Model for Thermoacoustic Instabilities 00:00 Introduction 01:10 Installation with Git 04:51 Standalone download 08:22 First steps in the toolbox 10:42 Overview of the library
ANNULIGhT PhD Project Summary Guillaume J J Fournier
Просмотров 1372 года назад
Guillaume Fourner presents his PhD research. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No 765998 "Annular Instabilities and Transient Phenomena in Gas Turbine Combustors" (ANNULIGhT).
Purwar++ Model Order Reduction Techniques for Thermoacoustic Analysis
Просмотров 2292 года назад
Model order reduction can play a pivotal role in reducing the cost of repeated computations of large thermoacoustic models required for comprehensive stability analysis and optimization. In this proof-of-concept study, acoustic wave propagation is modeled with a 1D network approach, while acoustic-flame interactions are modeled by a flame transfer function. Three reduction techniques are applie...
A Top Level Parallelization and Data Fusion Approach for FTF Identification
Просмотров 953 года назад
We present a novel procedure for design-of-numerical-experiment and data analysis. The goal is to to reduce return time and computational cost for identification of Flame Transfer Function (FTF), which is an important element in thermoacoustic stability analysis. A machine learning approach called Multi-Fidelity Gaussian Process (MFGP) fuses mono-frequent and broad-band excitation data in order...
Resarch @ TFD -- Thermoacoustic Combustion Instabilities
Просмотров 2,4 тыс.3 года назад
Research of the TFD group focuses on thermoacoustic combustion instabilities. This type of self-excited instability impairs the security and reliability of gas turbines and rocket motors as well as domestic or industrial burners. In order to analyse and control thermoacoustic instabilities, fluid mechanics, acoustics and combustion science are combined in an interdisciplinary approach with meth...
A GP-based framework for high-dimensional UQ of thermoacoustic instability predictions
Просмотров 1393 года назад
When combining a flame model with an acoustic solver to predict thermoacoustic instability, uncertainties embedded in the flame model and acoustic system parameters propagate through the thermoacoustic model, inducing variations in calculation results. Therefore, uncertainty quantification (UQ) analysis is essential for delivering a reliable prediction of thermoacoustic instability. A paper pre...
How to tune a single-can test rig to mimic the thermoacoustic behavior of a full engine
Просмотров 1573 года назад
How to tune a single-can test rig to mimic the thermoacoustic behavior of a full engine
A criterion for thermo-acoustic stability based on the flux of acoustic energy (CNF, 2021)
Просмотров 1653 года назад
A criterion for thermo-acoustic stability based on the flux of acoustic energy (CNF, 2021)
Yong et al. CNF '21 phasor diagrams of ITA modes
Просмотров 914 года назад
Yong et al. CNF '21 phasor diagrams of ITA modes
Guo++TX'20 Reliable calculation of thermoacoustic instability risk with an imperfect surrogate model
Просмотров 464 года назад
Guo TX'20 Reliable calculation of thermoacoustic instability risk with an imperfect surrogate model
Silva++TX'20 parametric Maps
Просмотров 744 года назад
Silva TX'20 parametric Maps
Silva++APS2020 intrinsic vs. acoustic modes and XPs
Просмотров 1394 года назад
Silva APS2020 intrinsic vs. acoustic modes and XPs
Guo et el. PROCI '21: "Gaussion Process framework for high-dimensional UQ in thermoacoustics"
Просмотров 454 года назад
Guo et el. PROCI '21: "Gaussion Process framework for high-dimensional UQ in thermoacoustics"
Haeringer et al.: "Tune Acoustic Terminations of Single-Can Test-Rigs ..."
Просмотров 734 года назад
Haeringer et al.: "Tune Acoustic Terminations of Single-Can Test-Rigs ..."
Schaefer++TurboExpo'20 XPs
Просмотров 684 года назад
Schaefer TurboExpo'20 XPs
Fournier ++TurboExpo'20 Clusters of ITA Modes in Annular Combustors
Просмотров 2004 года назад
Fournier TurboExpo'20 Clusters of ITA Modes in Annular Combustors
M. Meindl++CNF'21 Spurious Entropy Generation
Просмотров 2164 года назад
M. Meindl CNF'21 Spurious Entropy Generation

Комментарии

  • @AshutoshNarayanSingh
    @AshutoshNarayanSingh 8 месяцев назад

    can it solve Helmholtz solver or can i calculate acoustic modes of any kind of duct

  • @omegafile
    @omegafile Год назад

    If I take a 90 hertz singing bowl and drill a 3/4 inch hole out of the bottom and welded a 3/4 inch pipe at the bottom hole with half inch center.... how long does the pipe have to be below the bowl to get a 90 hertz tone to make the bowl blow like a horn from heat at the sweet spot (0.224 the length from the bottom)? I'm looking for the math to figure this out.. or the answer if you can help thanks. I have designed a unique acoustic engine that gains mass and it's a bit too powerful to build and so I am trying to get the design as accurate as I can without having to build it and risk my life getting electrocuted. Theoretically, a device that gains mass would make it's own gravity and slow time.. and I'm not into the time thing if you know what I mean. I really don't want to build it. I already engineered the parts ready for a cnc machine but I don't want to have to fine tune it later within reason. I don't want to put on a suit that can take a lightning bolt and risk my life fine tuning it... and I don't want to build an expensive bowl only to find later that I made a mistake and have to make a second bowl. The height of the bowl is 8-3/4 inches and the diameter at the top is 9-3/8 inches. The bowl is shaped like a paraboloid..... egg shaped. This engine has an operating voltage of about 63,000 volts AC and more than 200 amps... so incredibly dangerous to get near it when it's running. I am sitting on it for decades. This engine makes it's own water and turns it into plasma and cost nothing to run. It's not free energy.. it uses water as the fuel. It's sort of like a water cooled piezoacoustic electromagnet run on sound and feedback. It' so clever it looks like a galaxy complete with the black hole... so it should gain mass because everything will go through that hole... including dust... and even dust will give it power. It will make power from anything that goes through the hole including air.

    • @NOBOX7
      @NOBOX7 3 месяца назад

      It will tip over

    • @omegafile
      @omegafile 3 месяца назад

      @@NOBOX7 It's more like 1000 amps , 30k volts. I realize now that it will also do alchemy... if you put a lid on the bowl.. it becomes a golden magnetic egg.. all the diamagnetic elements will reject the magnet and shoot out the spouts. Air goes in with co2... and the oxygen stays in the egg and the carbon shoots out the spouts. H20 goes in and oxygen stays in the egg and hydrogen shoots out the spouts.. sulphur dioxide goes in and sulphur goes out the spouts.... you combine those 3 and it makes oil.... from the air. It's more simple than people can imagine. By turning the bowl into an egg.. it opens pandoras box.... because the cavity at the centre of the galaxy is an egg and galaxies create everything from dust and gas. we burn stuff to make gasses.... it can be reversed so that dust and gas can be turned into matter by a process called charge separation. The egg gets to about 700 degrees F.. it becomes a powerful magnet vibrating between 2 parallel conductors which become water cooled electromagnets. With parallel conductors.. the more the load the stronger the magnet will get.. so it will give energy on demand.... When you show something as simple and advanced as this....it's like showing it to a cow....so simple they still don't get it.....Scientists have not been able to explain it.. yet I explained it above...oxygen is paramagnetic and and hydrogen is diamagnetic.... oxygen likes the magnet and will stay in the egg.. and hydrogen is diamagnetic and hates the magnet and will shoot out the spouts.... so incredibly simple....

    • @omegafile
      @omegafile 3 месяца назад

      @@NOBOX7 My reply got deleted when I started talking about alchemy..,.how it can make matter from dust and gas. .. Oh well.....