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1
Content available remote Numerical and experimental investigation of the fan with cycloidal rotor
Dykas S., Majkut M., Smołka K., Strozik M., Chmielniak T., Staśko T.
Mechanics and Mechanical Engineering
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2018
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Vol. 22, nr 2
447--454
EN
In this paper, the investigation of the cycloidal rotor fan (CRF) was presented. A CRF with four blades of the NACA0012 profile was used for the analysis. The CFD calculations were carried out by means of Ansys CFX commercial software. The experimental tests were done using velocity field measurement with the LDA technique. Numerical results were compared with experimental measurement in terms of velocity values. The CRF performance characteristic was prepared on the basis of experimental and numerical results.
2
Content available Assessment of the capability of available methods of flow field numerical modelling on the example of air flow through a channel with a circular bump
Dykas S., Majkut M., Smołka K., Strozik M.
TASK Quarterly : scientific bulletin of Academic Computer Centre in Gdansk
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2017
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Vol. 21, No 3
185--294
EN
This paper is an attempt at a systematic approach to the flow field analysis in the case of air flowing through a straight channel with a circular bump. The results of the authors’ own experimental measurements are compared to those obtained by means of both an in-house and a commercial CFD code. Apart from the RANS method, which is commonly used in engineering applications, a decision was made to use the URANS and LES methods, which are available both in the in-house academic code and in the commercial program. The comparison between the calculation results is performed using what is referred to as the numerical Schlieren image, which for the RANS calculations is compared to the Schlieren image obtained from experimental testing.
3
Content available remote The performance of a steam-gas power unit of a velox-type cycle
Smołka K., Dykas S.
Journal of Power Technologies
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2017
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Vol. 97, nr 5
343--348
EN
For many years, the Institute of Power Engineering and Turbomachinery of the Silesian University of Technology has been using a Velox-type small-capacity gas-steam power unit for teaching and research purposes. The Velox-type gas-steam cycle is characterized by a much higher ratio of power obtained from the steam turbine and the gas turbine, respectively, compared to classical gas-steam cycles which are now in use worldwide. This paper presents a thermodynamic analysis of the Veloxtype gas-steam cycle as a small capacity combined heat and power plant (CHP). The systems are modelled in the EBSILO Nr Professional. The advantages and drawbacks of the Velox-type cycle compared to the classical one are presented.
4
Content available Condensation wave identification in moist air transonic flows through nozzles
Dykas S., Smołka K., Majkut M., Strozik M.
Transactions of the Institute of Fluid-Flow Machinery
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2016
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nr 131
67--77
EN
This paper identifies the location of water vapour spontaneous condensation during air expansion in convergent-divergent nozzles. The comprehensive analysis proposed herein includes an analytical solution together with experimental and numerical investigations. Numerical calculations are performed using an in-house computational fluid dynamics code based on the solution of Reynolds averaged Navier-Stokes equations supplemented with additional partial differential equations modelling the condensation process of water vapour contained in atmospheric air. Experiments were carried out using an in-house facility adapted for measurements of atmospheric air transonic flows.
5
Content available remote Experimental and numerical study on condensation in transonic steam flow
Majkut M., Dykas S., Strozik M., Smołka K.
Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
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2014
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nr 145
89--90
EN
The present paper describes an experimental and numerical study of steam condensing flow in a linear cascade of turbine stator blades. The experimental research was performed on the facility of a small scale steam power plant located at Silesian University of Technology in Gliwice. The test rig of the facility allows us to perform the tests of steam transonic flows for the conditions corresponding to these which prevail in the low-pressure (LP) condensing steam turbine stages. The experimental data of steam condensing flow through the blade-to-blade stator channel were compared with numerical results obtained using the in-house CFD numerical code TraCoFlow. Obtained results confirmed a good quality of the performed experiment and numerical calculations.
6
Content available remote Research on steam condensing flows in nozzles with shock wave
Dykas S., Majkut M., Smołka K., Strozik M.
Journal of Power Technologies
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2013
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Vol. 93, nr 5
288--294
EN
The paper presents experimental and numerical results of steam transonic flows in Laval nozzles. The geometries of half arc nozzles were used in testing. Subject to investigation was the behavior of shock waves in the wet steam region. Due to high back pressure the shock wave was created in the divergent part of the nozzle, and interaction with the nozzle walls caused instability in the flow. The experimental results were compared with numerical calculations of steam condensing transonic flow.
7
Niekomercyjna instalacja parowej mini-siłowni kondensacyjnej w Politechnice Śląskiej
Dykas S., Kotowicz J., Smołka K.
Rynek Energii
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2011
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nr 4
47-52
PL
W Instytucie Maszyn i Urządzeń Energetycznych Politechniki Śląskiej od bardzo wielu lat prowadzone są badania naukowe oraz zajęcia dydaktyczne dla studentów z wykorzystaniem parowej mini-siłowni kondensacyjnej znajdującej się w Hali Maszyn Cieplnych. Jest to jedyna znana niekomercyjna instalacja tego typu w Europie składająca się z kotła parowego, turbiny parowej ze skraplaczem, generatora elektrycznego, chłodni kominowej oraz tunelu do badań przepływu pary przez dysze i proste palisady łopatkowe. W wyniku powodzi, która miała miejsce w maju 2010 roku, zdecydowana większość maszyn i urządzeń siłowni uległa zniszczeniu. W artykule tym przybliżono przeznaczenie oraz budowę instalacji skupiając się na podstawowych maszynach energetycznych, a także na ich modernizacji i przeprowadzonych remontach mających na celu przywrócenie działania instalacji po powodzi.
EN
In the Institute of Power Engineering and Turbomachinery of the Silesian University of Technology the courses for students and experimental research have been performed from many years now. To this end a mini steam power station located in Machinery Hall is used. It is a unique non-commercial installation of such kind in Europe, consisting of a steam boiler, steam turbine with condenser, electric generator, cooling tower and a tunnel to test the flows of steam through nozzles and blade cascades. During the flood, which took place in May 2010, majority of the power station machinery and devices were devastated. In this paper the mini steam power plant (called also as a Small Rankine Cycle) has been presented, its main machinery and devices as well a modernization process after flood have been described.
8
Możliwości badań eksperymentalnych przepływu pary mokrej w układzie mini-siłowni kondensacyjnej
Smołka K., Strozik M., Majkut M., Dykas S.
Prace Naukowe Politechniki Warszawskiej. Konferencje
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2011
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z. 27
233--240
PL
W Instytucie Maszyn i Urządzeń Energetycznych Politechniki Śląskiej od bardzo wielu lat prowadzone są badania naukowe z wykorzystaniem parowej mini-siłowni kondensacyjnej znajdującej się w Hali Maszyn Cieplnych. Jest to jedyna znana niekomercyjna instalacja tego typu w Europie składająca się z kotła parowego, turbiny parowej ze skraplaczem, generatora elektrycznego, chłodni kominowe] oraz tunelu do badań przepływu pary mokrej. W artykule przybliżone przeznaczenie i budowę instalacji stanowiska badawczego do przepływów pary mokrej z kondensacją oraz plany jego wykorzystania. W aktualnym stanie tunel ten stanowi interesującą instalację badawczą do analizy wielu zagadnień przepływowych.
EN
In the Institute of Power Engineering and Turbomachinery of The Silesian University of Technology the experimental research have been performed from many years now. To this end a mini steam power station located in Machinery Hall is used. It is unique noncommercial installation of such kind in Europe, consisting of a steam boiler, steam turbine with condenser, electric generator, cooling tower and tunnel to the wet steam flows. In this paper has been presented purpose and construction of wet steam tunnel and plans for its use. In the present state of this tunnel is an interesting research installation for the analysis of many problems of flow.
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