2112. Analysis of dynamic compliance of the supporting structure for the prototype of organic Rankine cycle micro‑turbine with a capacity of 100 kWe

Pawel Baginski1, Grzegorz Zywica2

The Szewalski Institute of Fluid-Flow Machinery, Polish Academy of Sciences,
Fiszera 14 st. Gdańsk 80-231, Poland

1Corresponding author

E-mail: 1pbaginski@imp.gda.pl, 2gzywica@imp.gda.pl

Received 12 September 2015; received in revised form 22 April 2016; accepted 30 April 2016

DOI https://doi.org/10.21595/jve.2016.17098

Abstract. The article describes the research carried out using a complex numerical model which had been developed applying finite element method (FEM). The supporting structure on which two turbine generators (with a target capacity of approx. 100 kWe) were placed was the object of this study. The calculations were aimed to determine the influence of dynamic properties of the supporting structure on the operation of turbogenerators. Within this study the following tasks have been accomplished: computational modal analysis was performed, the stiffness coefficients of the tested construction were determined and compared with the dynamic properties of the bearings used. This was necessary in order to analyze the dynamic interaction between the rotor and the turbine’s bearings.

Keywords: ORC systems, dynamics of machinery, modal analysis, dynamic compliance, dynamic stiffness, dynamic properties, supporting structure.

References

[1]        Żywica G., Rybczyński J. Identification of the model for the supporting structure of a fluid‑flow machine. Diagnostics, Vol. 4, Issue 40, 2006, p. 71‑76.

[2]        Żywica G. Modelling of dynamic reaction in system of rotor-bearing-supporting structure type. Machine Dynamics Problems, Vol. 31, Issue 4, 2007, p. 99‑109.

[3]        Żywica G. Simulation investigation of the effect of a supporting structure defect on the dynamic state of the rotor supported on slide bearings. Proceedings of the ASME International Design Engineering Technical Conference and Computers and Information in Engineering Conference, Vol. 1, 2008, p. 1665‑1674.

[4]        Kiciński J., Żywica G. Numerical analysis of defects in the rotor supporting structure. Advances in Vibration Engineering, Vol. 10, Issue 4, 2011, p. 197‑204.

[5]        Cholewa W., Kiciński J. Reverse Diagnostic Models. Technical Diagnostics, Gliwice, 1997.

[6]        Kiciński J. Modeling and Diagnostics of Mechanical, Aerodynamical and Magnetic Interactions in Energy Turbine Sets. IFFM Publishers, Gdańsk, 2005.

[7]        Kiciński J. Dynamics of Rotors and Slide Bearings. IFFM Publishers, Gdańsk, 2005.

[8]        Bagiński P., Żywica G., Kiciński J. Simulation Modal Analysis of the Supporting Structure of a 100 kW Turboset Operating in a Prototypical ORC System at the IFFM PAS Laboratory. Internal Report No. 145/2015.

[9]        Weiwei X., Kuanmin M., Bin L., Sheng L. Contact stiffness of bolted joint with different material combination in machine tools. Journal of Vibroengineering, Vol. 16, Issue 7, 2014, p. 3281‑3293.

[10]     Żywica G., Kiciński J. Analysis of Dynamical Properties of the Rotor of a Seven-Stage Axial-Flow Steam Micro-Turbine Coupled with an ORC System, Taking into Account Properties of the Supporting Structure. the Assessment of the Risk of Resonance Phenomena at Nominal Speed or during Run Up/Coast Down. IMP PAN, Internal Report No. 494/2014.

[11]     Żywica G., Breńkacz Ł. Analysis of Dynamical Properties of a 100 kW Micro-Turbogenerator Taking into Account the Belt Transmission and Electric Generator. the Assessment of the Risk of Resonance Phenomena Over the Entire Operational Speed Range. IMP PAN, Internal Report No. 1058/2014.

[12]     Młyńczak J. Algorithm Determining the Setting Force at Point Machines. Telematics – Support for Transport. Book Series: Communications in Computer and Information Science, Vol. 471, Springer, Heidelberg, 2014, p. 321‑330.

[13]     Kuminek T., Aniołek K., Młyńczak J. A numerical analysis of the contact stress distribution and physical modelling of abrasive wear in the tram wheel-frog system. Wear, Vol. 328, 2015, p. 177‑185.

[14]     Piotrowski B., Gronek A. The design of the test rigs and the turbine disk for the CHP power plant. 2014.

[15]     The Architectural-Construction Design of the Interchangeable Frame. 2014.

Cite this article

Baginski Pawel, Zywica Grzegorz Analysis of dynamic compliance of the supporting structure for the prototype of organic Rankine cycle micro‑turbine with a capacity of 100 kWe. Journal of Vibroengineering, Vol. 18, Issue 5, 2016, p. 3153‑3163.

 

© JVE International Ltd. Journal of Vibroengineering. Aug 2016, Vol. 18, Issue 5. ISSN 1392-8716