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1

A Numerical Study of the Relation Between the Acoustic Generator Geometry and the Heat Transfer Conditions

Rulik S., Wróblewski W., Rusin K.

Archive of Mechanical Engineering

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2018

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Vol. LXV, nr 1

5--26

EN

Modern gas turbine systems operate in temperatures ranging from 1200°C to even 1500°C, which creates bigger problems related to the blade material thermal strength. In order to ensure appropriate protection of the turbine blades, a sophisticated cooling system is used. Current emphasis is placed on the application of non-stationary flow effects to improve cooling conditions, e.g., the unsteady-jet heat transfer or the heat transfer enhancement using high-amplitude oscillatory motion. The presented research follows a similar direction. A new concept is proposed of intensification of the heat transfer in the cooling channels with the use of an acoustic wave generator. The acoustic wave is generated by an appropriately shaped fixed cavity or group of cavities. The phenomenon is related to the coupling mechanism between the vortex shedding generated at the leading edge and the acoustic waves generated within the cavity area. Strong instabilities can be observed within a certain range of the free flow velocities. The presented study includes determination of the relationship between the amplitude of acoustic oscillations and the cooling conditions within the cavity. Different geometries of the acoustic generator are investigated. Calculations are also performed for variable flow conditions. The research presented in this paper is based on a numerical model prepared using the Ansys CFX-17.0 commercial CFD code.

2

The influence of outlet system geometry on Tesla turbine working parameters

Rusin K.

Acta Innovations

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2017

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no. 22

58--67

EN

The paper presents an analysis of the influence of Tesla turbine outlet system geometry on parameter distribution and power. Simulations were carried out with the aid of Ansys products: DesignModeler, Meshing and CFX 17.0. The model geometry was based on the dimensions of existing turbine. Three different types of outlet system were investigated. A mesh independence study was carried out in order to obtain results which were unaffected by discretization method. Computations were performed using experimental data. The flow phenomena occurring inside the turbine are described in addition to the differences caused by outlet system geometry. Numerical results were confronted with experimental analysis.

3

Co wybrać - kremację, czy pochówek?

Olech A., Rusin K., Wandrasz J. W.

Przegląd Komunalny

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1999

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nr 12

60-63

PL

Ewolucja populacji ludzi na Ziemi - licząc od 10 tysięcy lat przed naszą erą - pokazuje, że w ciągu ostatnich 50 lat nastąpił okres szybkiego wzrostu zaludnienia. W tym czasie ludność świata zwiększyła się o tyle ile wynosił jej wzrost w czasie 2,5 min lat dzielących nas od homo erectus. Szacunki liczby ludności świata w 2050 r. wahają się od 7,8 mld do 12,5 mld. Wzrost ludzkiej populacji niesie ze sobą konieczność rozwiązywania problemów cywilizacyjnych, a w tym i jednego z najważniejszych, związanego z zachowaniem godności do właściwego pochówku.

4

Řetízkový grafit v litině s kuličkovým grafitem (LKG)

Šustek P., Stránský K., Rusin K.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

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1998

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z. 57

135-138

5

Deformační vlastnosti slévárenských samotuhnoucích směsí a množestvi jejich ovládání

Čechák P., Rusin K.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

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1998

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z. 57

81-84