Abstract
At the moment there is no effective way to clean the flow of the turbine unit, which is justified from an economic point of view. It is important to understand how deposits affect compressor performance and the need to clean out contaminants. In the available literature, such studies are not described. The computational model of a stage domain for the study includes the following elements: inlet pipe, impeller, bladeless diffuser, swivel elbow, backward guide apparatus, outlet pipe. For calculations, the computational fluid dynamics methods in the Ansys software package were used. A numerical experiment was carried out in six mass flow rate variants, two impeller revolutions variants, and three different sediment thicknesses in the flow part variants. Based on the numerical experiment results, the calculated machine operating modes characteristics are constructed. The analysis revealed that the studied deposits cause a drop in the stage characteristics by 1.5-2%. Losses in the stage increase proportionately to the thickness of deposits in the compressor flow part.
Highlights
Centrifugal compressors have found the widest application in power engineering
As it can be seen from the graphs, the deposits presence in the compressor flowing part causes a drop in the compressor characteristics output, the drop lies within 1-2%
As a result of the numerical study carried out in CFD for the this type stage and modes of operation, it has been shown that, in addition to the deposits effect on characteristics, other factors that may have a greater effect on the change in compressor performance during operation are to be considered
Summary
Centrifugal compressors have found the widest application in power engineering. In modern gastransport networks, centrifugal compressors are the main equipment for gas compression. One of the simplest methods is mechanical compressor flow part cleaning This method is quite effective, but requires complete unit stoppage and partial disassembly. This involves some difficulties, the gas transport shutdown since causes economic loss, as well as a reverse assembly of the machine, in which , for example, it is possible to improperly perform balancing, which will lead to other problems. The second method is special pumping composition through a turbine unit flowing part This method does not require stopping the machine, but does not guarantee a flow section complete cleaning, since if the composition is excessively aggressive, the compressor working part may be a subject to destruction. The objectives of this work: 1. Sediments effects investigation in a centrifugal compressor flow part and the rationale for cleaning from an economic point of view
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