Institute of Turbomachinery I-12
Head of the unit:
Prof. Krzysztof Jóźwik, PhD, DSc
Potential promoters:
Prof. Krzysztof Jóźwik, PhD, DSc Damian Obidowski, PhD, DSc, TUL Prof.
Contact person:
Damian Obidowski, PhD, DSc, TUL Prof. phone: 48-42-631-23-88, damian.obidowski@p.lodz.pl
Scope of activities:
The main areas of interest and research directions are the following problems falling within the general concept of Biomedical Engineering:
- long-term tests of an artificial heart valve with a ring covered with nanocrystalline diamond on the test stand designed at the Institute of Turbomachinery, TUL,
- investigations on conduction of regenerated peripheral nerves in rats and the use of freezing and heating techniques in the removal of focal lesions of the thyroid lobes, conducted in cooperation with the Division of Flow Metrology,
- research on diamond microfluidic devices for DNA and protein analysis within the international MNT ERANET project,
- numerical simulations of the blood flow through arteries in the human body and ventricular assist devices, and of the air flow through the respiratory tract.
Present activities:
We prepare personalized anatomical Pmodels of the respiratory tract and arterial and vein channels on the basis of the data saved in the DICOM format, obtained during diagnostic tests employing computed tomography. We develop algorithms for automatic segmentation (separation) of appropriate areas from the biomedical images provided, and then we generate spatial models for numerical calculations and construction of phantoms in 3D printing technology. We carry out numerical and experimental tests of the flow using the PIV (Particle Image Velocimetry) technique and traditional methods, i.e., measurements with ultrasonic flowmeters and pressure transducers. In numerical investigations, we determine velocity and pressure fields, mass flow rates in individual branches of the system, and predict patterns of particle deposition on the walls of 3D models. We perform numerical simulations in a pulsating flow. We use non-Newtonian rheological models that are close to the physiological properties of blood. We conduct calculations with the use of deformable walls owing to a combination of flow and structural solvers.
Future activities:
Development of current and generation of new, more comprehensive numerical models to describe better the properties of blood vessel walls, autocontrol of blood circulation and tissue aging processes.
Publications/patents, awards, projects:
- Reorowicz, P., Obidowski, D., Klosinski, P., Szubert, W., Stefanczyk, L., Jozwik, K. (2014). Numerical simulations of the blood flow in the patient-specific arterial cerebral circle region. Journal of Biomechanics, 47(7), 1642-1651.
- Tyfa, Z., Jóźwik, P., Obidowski, D., Reorowicz, P., Jodko, D., Kapka, K., Makosiej R., Czkwianianc E., Jóźwik, K. (2020). Inhaled drug airflow patterns and particles deposition in the paediatric respiratory tract. Acta of Bioengineering and Biomechanics, 22(2), 101-110. We conduct the following research projects:
- “Prediction of Endovascular Treatment Results by Individualized Numerical Analysis” – project financed by the National Centre for Research and Development, Competition „LIDER X”, 01.2020-12.2022;
- "Sol-gel antibacterial layers containing carbon nanoparticles" – International project M-ERA.NET Call 2019, in cooperation with the Technical University of Liberec and PPHU Termex, Ltd., 05.2020 – 05.2023.
- "Creating an absorbable dressing based on active exogenous tropocollagen from fish skins with the addition of modified carbon nanopowders", National Centre for Research and Development, Competition "Application Projects" in cooperation with Sancoll Ltd and Nicolaus Copernicus University in Toruń , 01.2021 – 01.2024.
Keywords:
heart valves, extracorporeal heart assist pumps, blood flow tests, blood flow modelling, laser (PIV) flow testing, dialysis fistulas, 3D model reconstruction, DICOM
List of internship proposal in this research team:
Co-operation during validation tests of FSI-type numerical calculations on the test stand.
The portfolio of research groups was created as part of the Programme "STER" – Internationalisation of doctoral schools” as part of the realization of the project “Curriculum for advanced doctoral education & taining – CADET Academy of Lodz University of Technology”.
Institute of Turbomachinery I-12
Head of the unit:
Prof. Zbigniew Kozanecki, PhD, DSc
Potential promoters:
Jakub Łagodziński, PhD, DSc
Contact person:
Jakub Łagodziński, PhD, DSc phone: 48-42-631-23-87, jakub.lagodzinski@p.lodz.pl
Scope of activities:
The search for new solutions of turbomachines with special technological requirements increases the interest in the technology of untypical support of the rotating shafts of these machines. More and more often, specific functional conditions make an application of traditional, commonly known solutions in the support system of the machine rotating shaft difficult or even impossible. This applies in particular to machines operating in closed, hermetic flow circuits or in machines operating under unusual temperatures. Bearings and supports, the design of which employs the principle of operation or a working medium that is unusual for a given field of application, are called unconventional bearings. An interesting alternative to the development of this technology is the use of the turbomachine working medium as a lubricant. Due to the complexity and variety of modern technical solutions of turbomachines, knowledge from many fields related to thermodynamics, fluid mechanics, materials engineering, manufacturing technology, tribology and dynamics should be combined at the stage of their design. The operation of these machines places equally high demands, because also here interdisciplinary knowledge on an interaction of phenomena related to their operation is an essential factor in correct and safe operation. The basic element of these activities is the use of numerical methods for technical analyses of new machine design concepts, with particular emphasis on the dynamics of the rotating system, which determines the reliability of performance and the competitiveness of innovative technical solutions of turbomachines. A separate and very important issue is the technical implementation of prototypes and technology demonstrators of the proposed technical solutions, because their correct operation allows for real interest of potential industrial partners in the development and implementation of the proposed technologies into industrial practice.
Present activities:
The main areas of interest and directions of the research currently carried out at the Division are the following issues:
- design of prototypes and technology demonstrators of innovative turbomachines with unconventional bearings,
- development of design and tests of new generation foil gas bearings and their implementation into prototype high-speed turbomachines,
- analyses, numerical simulations and expert opinions related to the dynamics of industrial machines working in chemical and petrochemical industries,
- HCF and LCF tests, as well as dynamic and destructive tests of prototype components of the helicopter power transmission system conducted on test stands designed at the Division of Automatics and Diagnostics of Turbomachinery.
Future activities:
Developing current research directions and building new, more complex numerical models that will describe more accurately the dynamic properties and the physics of phenomena in unconventional technical solutions of machines under investigation.
Keywords:
turbomachines, unconventional bearings, dynamics of rotating systems, shaft fatigue tests, foil bearings, gas bearings
List of internship proposal in this research team:
Co-operation in tests and generation of numerical models of rotating systems of turbomachines
The portfolio of research groups was created as part of the Programme "STER" – Internationalisation of doctoral schools” as part of the realization of the project “Curriculum for advanced doctoral education & taining – CADET Academy of Lodz University of Technology”.
Institute of Turbomachinery I-12
Head of the unit:
Krzysztof Sobczak, PhD, DSc
Potential promoters:
Krzysztof Sobczak, PhD, DSc
Contact person:
Krzysztof Sobczak, PhD, DSc, phone: 48-42-631-23-62, krzysztof.sobczak@p.lodz.pl
Scope of activities:
The main areas of interest and research directions are:
- design and investigations of small wind turbines: modelling and optimization of rotors, investigations of aerodynamic airfoils, rapid 3D prototyping and measurements of power and thrust of turbine models,
- design and investigations of centrifugal pumps: determination of characteristics, testing of transient states (water hammer), flow simulations in pumps and water turbines,
- investigations of rotors for small flying vehicles: power and thrust determination; design and development of multi-rotor structures, rotors equipped with winglets, duct augmented rotors, etc.,
- measurements in the low-speed wind tunnel: tests of aerodynamic forces, pressure distributions, measurements of velocity and turbulence, flow visualization,
- modelling of incompressible and compressible (subsonic and supersonic) flows.
Present activities:
The investigations carried out at the Division are focused on the development of small wind turbines with horizontal and vertical rotation axes (HAWT and VAWT). These works integrate classic methods of rotor design and optimization with data obtained from two research paths: numerical (CFD methods) and experimental (measurements of power and aerodynamic forces as well as flow fields) in our low-speed wind tunnel and in cooperation with scientific and industrial overseas partners. The Division is currently investigating, inter alia, duct augmented wind turbines and vertical axis wind turbines with variable blade geometry. The Power Engineering Students Association conducts the research within the GUST home wind turbine project.
The Division members are also conducting research on rotors for small flying vehicles. Concepts of systems of counter-rotating rotors working in channels, blades with a variable pitch, etc. are being developed.
Thanks to the experience in conducting investigations employing various techniques (including pneumatic measurements, thermoanemometry, PIV laser flow visualization) and rapid prototyping (3D printing), the Division can conduct aerodynamic tests of a wide range of objects.
Future activities:
Development of numerical flow models and optimization procedures. Experimental investigations of various designs of wind turbines. Aerodynamic and aeroacoustic measurements of rotors.
Publications/patents, awards, projects:
- Sobczak K., Obidowski D., Reorowicz P., Marchewka E.: Numerical Investigations of the Savonius Turbine with Deformable Blades, Energies, 2020 (DOI: 10.3390/en13143717)
- Lipian M., Dobrev I., Karczewski M., Massouh F., Jozwik K.: Small wind turbine augmentation: Experimental investigations of shrouded- and twin-rotor wind turbine systems, Energy, 2019 (DOI: 10.1016/j.energy.2019.115855)
We conduct the following research projects:
- Twin shrouded rotor for a small aerial vehicle NUTRIA – project Lider XI (2021/01 – 20224/01), https://www.researchgate.net/project/Twin-shrouded-rotor-for-small-aeri…;
- Small Wind Turbine GUST – project of the Power Engineering Students Association, financed by Najlepsi z Najlepszych!, Łódź Naukowa Łódź Akademicka, https://www.facebook.com/GUSTprojectPL/
Keywords:
applied aerodynamics; wind turbines; rotors; computational fluid dynamics (CFD); experimental investigations in the wind tunnel; hydraulic machines; pumps; water turbines
List of internship proposal in this research team:
- Modelling of flows based on CFD methods; hybrid, analytical and other models.
- Wind tunnel aerodynamic tests of various objects (wind turbines, rotors, etc.).
The portfolio of research groups was created as part of the Programme "STER" – Internationalisation of doctoral schools” as part of the realization of the project “Curriculum for advanced doctoral education & taining – CADET Academy of Lodz University of Technology”.
Institute of Turbomachinery I-12
Head of the unit:
Aleksander Olczyk, PhD, DSc
Contact person:
Aleksander Olczyk, PhD, DSc, TUL Prof., phone: 48-42-631-23-84, aleksander.olczyk@p.lodz.pl
Scope of activities:
Our main areas of interest are:
- investigations of unsteady flow phenomena in pipes supplied with pulsating flow ,
- calibration of pneumatic and hot-wire probes for 1-D, 2-D and 3-D flows, methods of approximation of calibration characteristics
- Identification and correction of fast-response gas temperature sensors
- Low-speed wind tunnel testing including: − Flow measurements through wind turbine and drone rotors (PIV, CTA, pressure measurements) − Determination of rotor characteristics (through measurements of torque and rotational speed, balance measurements) − Airfoil characteristic determination with PIV method, balance measurements and surface pressure distribution;
- Acoustic tests of sound absorption for different types of fabrics in anechoic acoustic chamber
Present activities:
- Experimental study of flow through drone rotor (in the frame of NCBiR Lider project: “Twin shrouded rotor for small aerial vehicle”;
- Investigations of flow dynamics phenomena in a system of pipes supplied with pulsating flow containing Helmholz resonator.
Future activities:
- Development of flow visualization techniques based on Schlieren method (and related methods, e.g. BOS)
- Automation of the process of pneumatical probes calibration
- Development of the method of dynamical calibration of temperature transducers with use of the impulse excitation method
Publications/patents, awards, projects:
- Olasek Krzysztof, Karczewski Maciej: Velocity data-based determination of airfoil characteristics with circulation and fuid momentum change methods, including a control surface size independence test. EXPERIMENTS IN FLUIDS, 2021, vol. 62, no 5, p. 1-21, AF: I-10, DOI: 10.1007/s00348-021-03193-9.
- Pałczyński Tomasz, Kantyka Krzysztof: Experimental and Numerical Investigations of Pipeline with Resonator. Mechanics and Mechanical Engineering, 2019, vol. 23, no 1, p. 17-22, AF: I-10, DOI: 10.2478/mme-2019-0003
- Samuel Bethalihem, Barburski Marcin, Błaszczak Jarosław, Witczak Ewa, Abramczyk Katarzyna: The Influence of Yarn and Weave Structures on Acoustic Materials and the Effect of Different Acoustic Signal Incidence Angles on Woven Fabric Absorption Possibilities. Materials, 2021, vol. 14, no 11, p. 1-16, DOI: 10.3390/ma14112814.
Keywords:
pulsating flow, wave propagation phenomena in pipes, wind tunnel, PIV (Particle Image Velocimetry), CTA (Constant Temperature Anemometry), flow metrology, fast response sensors
List of internship proposal in this research team:
- Identification of dynamic characteristics of temperature transducers for different flow parameters
The portfolio of research groups was created as part of the Programme "STER" – Internationalisation of doctoral schools” as part of the realization of the project “Curriculum for advanced doctoral education & taining – CADET Academy of Lodz University of Technology”.
Institute of Turbomachinery I-12
Scope of activities:
The main areas of interest and research directions are the following problems falling within the general concept of Mechanical Engineering:
- experimental investigations and modeling of heat transfer processes,
- experimental and numerical investigations of heat exchangers,
- testing of working components used in heating, refrigeration, air conditioning and heat pump systems,
- heat pipe operation tests,
- experimental investigations and numerical modeling of micro-scale flame propagation.
Present activities:
- We investigate experimentally and numerically micro-heat exchangers used in the automotive industry as well as in household appliances.
- We develop technologies that intensify heat transfer by using flow turbulence devices.
- We carry out tests of a household refrigerator at different thermal loads and we model a roll-bond evaporator, being a part of this device.
- We conduct research on the efficiency of a linear compressor.
- Heat pipes filled with various refrigerants and with various degrees of refrigerant filling are also tested.
- We have been working on a cooling system for PVT panels, the results will allow us to assess an influence of the panel temperature on its efficiency.
- A CFD model accounting for heat and mass transport is generated and will be used to analyze the paper drying process.
- We investigate experimentally and use numerical tools to analyze mechanisms of the laminar flame propagation in narrow channels.
Future activities:
Development of technology related to the intensification of heat transfer in heat exchangers as well as investigations of individual elements of cooling, air conditioning and heat pumps systems in order to optimize their operation.
Publications/patents, awards, projects:
- Jasiński P.B., Kowalczyk M.J., Romaniak A., Warwas B., Obidowski D., Gutkowski A. (2021). Investigation of ThermalFlow Characteristics of Pipes with Helical Micro-Fins of Variable Height. Energies, 14(8), 2048, 1-18,
- Gutkowski A. N., Łęcki M., Jasiński P., Jędrowiak B. (2019). Flame Behavior During Propagation in Small Isothermal Tubes Characterized by Different Degrees of the End Opening, Combustion Science and Technology, vol. 191, No. 4, 711-725,
- Górecki G. (2018). Investigation of Two-Phase Thermosyphon Performance Filled with Modern HFC Refrigerants. Heat and Mass Transfer, vol. 54, no. 7, p. 2131-2143.
- We have been conducted the following research project: Hybrid Systems for Solar Energy Conversion – project financed by the National Centre for Research and Development, Lodz University of Technology and FLEXIPOWER GROUP, 01.12.2019 – 30.11.2022, co-executor.
- Patent: Górecki G., Łęcki M. Banasiak A. Two-phase thermosiphon heat exchanger, PAT. 230688.
Keywords:
refrigeration, refrigeration compressors, heat transfer, heat exchangers, two-phase flows, heat pipes, micro-scale gas combustion
List of internship proposal in this research team :
- Investigation of an influence of geometric parameters of the microchannel evaporator in refrigeration systems on its thermal efficiency.
The portfolio of research groups was created as part of the Programme "STER" – Internationalisation of doctoral schools” as part of the realization of the project “Curriculum for advanced doctoral education & taining – CADET Academy of Lodz University of Technology”.
Institute of Turbomachinery I-12
Head of the unit:
Prof. Władysław Kryłłowicz, PhD, DSc
Contact person:
Grzegorz Liśkiewicz, PhD, phone: 48-42-631-23-70, grzegorz.liśkiewicz@p.lodz.pl
Scope of activities:
- The main fields of the team’s research interests cover the following items:
- unsteady flow-phenomena in radial diffusers of centrifugal compressors;
- issues of aerodynamic instabilities in the stages of centrifugal compressors;
- fluid-structure interactions in turbo-compressors;
- revamp and retrofit of process centrifugal compressors;
- design of small steam turbines for decentralized power generation;
- problems of in-field applications of industrial turbomachinery;
- design projects of Organic Rankine Cycle (ORC) circuits and turbines.
Present activities:
- Investigations of compressor surge at the dedicated test-rig.
- Investigations of rotating stall in vaneless radial diffuser (carried out at the specialized single-stage blower test-bench).
- Development of aerodynamic design methods of multi-stage centrifugal compressors.
- Investigations of forced-response of compressor impeller wheels to fluidinduced excitations at nominal and off-design conditions.
- Design and development of small steam turbines (up to 300 kW)
Future activities:
Development of three currently existing centrifugal compressor test-rigs with focus on increase of their maximal rotational speeds and extension of measurement instrumentation’s capabilities.
Publications/patents, awards, projects:
Publications:
- Liśkiewicz G, Kabałyk K. i inni: Experimental Analysis of Surge -Detection System based on Pressure Derivatives at Part – Speed Operation, J. Eng. Gas Turbines and Power, May 2021, Vol.143., 0511018
- Kryłłowicz W., Szewczyk W. i inni: A blower for high temperaturę fumes in a paper machine, Engineering Stuctures 196 (2019) 109279
- Kabalyk K., Jaeschke A. i inni: Structural response of a single-stage centrifugal compressor to fluid-induced excitations at low-flow operating condition: experimental and numerical study, Energies, 2021, (article in press)
- Grapow F., Olasek K. i inni: Experimental Study of Vaneless Diffuser Rotating Stall Development and Cell-Merging Phenomena, J. Turbomachinery, May 2021, Vol. 143, 051008
Research projects:
- Investigations of vaneless diffuser air injection for stability improvement and performance range extension of centrifugal compressors, Nr.0200 /DIA/ 2015/44
- Industrial centrifugal compressors: safety and efficiency, Nr Lider/447/L-6/14/NCBR/2015
Keywords:
steam turbine, radial compressor, compressor surge, fluid-structure interaction
List of internship proposal in this research team:
- development of software for aerodynamic design and optimization of centrifugal compressors,
- experimental and numerical investigations of aero-instabilities in centrifugal compressors,
- development of methods for fatigue assessments in compressors’ impellers via fluid-structure interaction modelling (FSI).
The portfolio of research groups was created as part of the Programme "STER" – Internationalisation of doctoral schools” as part of the realization of the project “Curriculum for advanced doctoral education & taining – CADET Academy of Lodz University of Technology”.