DOI: 10.18503/1995-2732-2021-19-1-83-93
Abstract
The high-quality design calculation of the flow part of a centrifugal compressor is made by means of appropriate accu-rate mathematical models. Accuracy of mathematical models for the design of the flow part is provided by a qualitative identification of a mathematical model. The identification is made using a database of full-scale or virtual experimental data of compressor stage operation. It is a very resource-intensive process to compile the required complete base of experimental data using full-scale tests and it is often unaffordable for compressor manufacturers. An alternative is to create a quality database using the results of virtual tests, which provides the necessary accuracy of the mathematical model. The paper deals with the results of developing a database of geometry and gas-dynamic parameters of impellers of low-flow centrifugal compressor stages using virtual tests, which provides a high quality design. The input data representing the geometry parameters of the impeller are varied, thereby changing the shape of the flow part of the impeller. By means of a digital twin built on the basis of a parameterized calculation model, a numerical simulation is carried out by means of computational fluid dynamics (CFD). The output data are the basic gas-dynamic parameters used to assess the quality of the flow part. Totally in the database there are 115,020 numeri-cal values obtained by simulating 1620 impellers with 71 parameters each. The obtained data can be structured, analyzed and used to identify various mathematical models of losses of low flow centrifugal compressor stages, predictive analysis of impeller characteristics and rapid virtual compressor prototyping. In addition, the database will contribute to the standardization of size series of centrifugal compressor stages in production.
Keywords
Compressor design quality, low flow stage, centrifugal compressor, database.
For citation
Ivanov V.M., Kozhukhov Yu.V. Improving the Design Quality of Low Flow Centrifugal Compressor Stages by Creating a Database of Virtual Impellers Based on CFD Modeling Results. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2021, vol. 19, no. 1, pp. 83–93. https://doi.org/10.18503/1995-2732-2021-19-1-83-93
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