Improving the efficiency of radial-axial rotors of turbine stages through the use of complex lean of trailing edges

Authors

  • R. A. Rusanov The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences, Gdansk, Poland, Poland
  • A. V. Rusanov The A. N. Podgorny Institute for Mechanical engineering problems NAS of Ukraine, Kharkov, Ukraine, Ukraine
  • P. Lampart The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences, Gdansk, Poland, Poland
  • M. A. Chugay The A. N. Podgorny Institute for Mechanical engineering problems NAS of Ukraine, Kharkov, Ukraine, Ukraine

Keywords:

radial-axial turbine, flow part, analytical method of profiling, spatial flow, numerical modeling, complex lean

Abstract

The influence of shape of the blade trailing edges on the flow patterns and integral flow characteristics of the radial-axial turbine rotors is investigated. Also a modified analytical method of design of spatial blades of radial-axial rotors with complex lean of leading and trailing edges is proposed. A radial-axial rotor designed for a turboexpander unit of a complex gas treatment plant working in a gas condensate field is chosen as an object of investigations. Three types of rotors are considered having the same geometry of meridional contours, but differing in shape of blade trailing edges. In the first variant of the rotor its blades have radial trailing edges, in the second variant the trailing edges are straight with circumferential lean, and in the third variant they are designed in the form of arcs leaned in the circumferential direction. It is shown that the application of complex lean of trailing edges of low-loaded radial-axial rotor blades allows us to increase the flow efficiency by 3.1% compared with the rotor blades having radial trailing edges

Author Biographies

R. A. Rusanov, The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences, Gdansk, Poland

Доктор технических наук

A. V. Rusanov, The A. N. Podgorny Institute for Mechanical engineering problems NAS of Ukraine, Kharkov, Ukraine

Doctor of Technical Sciences

P. Lampart, The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences, Gdansk, Poland

Doctor of Technical Sciences

M. A. Chugay, The A. N. Podgorny Institute for Mechanical engineering problems NAS of Ukraine, Kharkov, Ukraine

Ph.D.

References

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Published

2016-12-20

Issue

Vol. 19 No. 4 (2016)

Section

Power Engineering

License

Copyright (c) 2016 R. A. Rusanov, A. V. Rusanov, P. Lampart, M. A. Chugay

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