NUMERICAL ANALYSIS OF THE EXPANSION PROCESS IN A TWO-STAGE AXIAL TURBINE OPERATING WITH MDM SILOXANE

This article describes the results of a project whose task is to research and develop a screw expander through the inversion of a screw compressor. The article summarizes aspects of the construction of an experimental device that works with an oil-flooded air screw expander. The expander was subjected to experimental and numerical analysis, the results of which are presented in the article. Numerical analysis to examine the expansion process is performed both on the basis of the analytical geometric description of the working chamber of the expander and on the basis of the geometry obtained from a 3D scan of a real machine. The results of experimental and numerical analysis will be used to integrate an oil-flooded screw expander into an energy unit for the use of low-potential heat, for example in ORC systems.

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Characterization of component interactions in two-stage axial turbine

Chinese Journal of Aeronautics ◽

10.1016/j.cja.2016.06.007 ◽

2016 ◽

Vol 29 (4) ◽

pp. 893-913 ◽

Cited By ~ 2

Author(s):

Adel Ghenaiet ◽

Kaddour Touil

Keyword(s):

Two Stage ◽

Axial Turbine

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Numerical analysis of stent expansion process in coronary artery stenosis with the use of non-compliant balloon

Journal of Applied Biomedicine ◽

10.1016/j.bbe.2015.10.009 ◽

2016 ◽

Vol 36 (1) ◽

pp. 145-156 ◽

Cited By ~ 14

Author(s):

Jakub Bukala ◽

Piotr Kwiatkowski ◽

Jerzy Malachowski

Keyword(s):

Coronary Artery ◽

Numerical Analysis ◽

Coronary Artery Stenosis ◽

Artery Stenosis ◽

Expansion Process ◽

Stent Expansion

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Investigation of the Optimum Clocking Position in a Two-Stage Axial Turbine

International Journal of Rotating Machinery ◽

10.1155/ijrm.2005.202 ◽

2005 ◽

Vol 2005 (3) ◽

pp. 202-210 ◽

Cited By ~ 10

Author(s):

Dieter Bohn ◽

Sabine Ausmeier ◽

Jing Ren

Keyword(s):

Flow Field ◽

Unsteady Flow ◽

Preliminary Design ◽

Two Stage ◽

Axial Turbine ◽

Sliding Mesh ◽

Field Distributions ◽

Unsteady Simulation

A frozen rotor approach in a steady calculation and a sliding mesh approach in an unsteady simulation are performed in a stator clocking investigation. The clocking is executed on the second stator in a two-stage axial turbine over several circumferential positions. Flow field distributions as well as the estimated performances from two approaches are compared with each other. The optimum clocking positions are predicted based on the estimated efficiency from the two approaches. The consistence of the optimum clocking positions is discussed in the paper. The availability and the limit of the frozen rotor approach in predicting the optimum clocking position is analyzed. It is concluded that the frozen rotor approach is available to search the optimum clocking position in the preliminary design period, although it misses some features of the unsteady flow field in the multistage turbines.

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