title: ÐÐ¿ÑÐ¸Ð¼Ð¸Ð·Ð°ÑÐ¸Ñ ÑÐ°Ð½Ð³ÐµÐ½ÑÐ¸Ð°Ð»ÑÐ½ÑÑ Ð²ÑÑ Ð¾Ð´Ð½ÑÑ Ð¿Ð°ÑÑÑÐ±ÐºÐ¾Ð² ÑÐµÐ½ÑÑÐ¾Ð±ÐµÐ¶Ð½ÑÑ ÐºÐ¾Ð¼Ð¿ÑÐµÑÑÐ¾ÑÐ¾Ð²
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Optimization of tangential outlet pipes of centrifugal compressors
Creators: name: ÐÐ°ÑÐ¾Ð½Ð¸Ð½, ÐÑÑÐµÐ¼
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2024
Subjects: ÐÐ¾Ð¼Ð¿ÑÐµÑÑÐ¾ÑÑ ÑÐµÐ½ÑÑÐ¾Ð±ÐµÐ¶Ð½ÑÐµ
ÐÐ°ÑÑÑÐ±ÐºÐ¸
ÐºÐ¾Ð»ÑÑÐµÐ²Ð°Ñ ÑÐ±Ð¾ÑÐ½Ð°Ñ ÐºÐ°Ð¼ÐµÑÐ°
Ð²ÑÑÐ¸ÑÐ»Ð¸ÑÐµÐ»ÑÐ½Ð°Ñ Ð³Ð°Ð·Ð¾Ð´Ð¸Ð½Ð°Ð¼Ð¸ÐºÐ°
Ð¾Ð¿ÑÐ¸Ð¼Ð¸Ð·Ð°ÑÐ¸Ñ
annular assembly chamber
computational gas dynamics
optimization

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description: The classical theory of turbochargers distinguishes two types of output devices of centrifugal compressors â an annular assembly chamber of constant cross-section and an annular assembly chamber of variable cross-section (snail). Each of them has a number of advantages and disadvantages, but the key to the correct initial design of output devices and their subsequent optimization in CAE packages will increase the efficiency of the centrifugal compressor stage from 2 to 15 %. The paper considers the formulation of the problem in the form of static purging and the subsequent optimization of the annular assembly chamber in the commercial Ansys program.Â  The scientific work presents 15 objects with annular prefabricated chambers with a conditional flow coefficient F from 0.015 to 0.15 and for each variant in terms of speed, 3 variants of the theoretical pressure coefficient ÏT 0.45; 0.6; 0.7 were obtained. This range of conditional flow coefficients covers most of the modern designed centrifugal compressors. For all objects, the characteristics of the full pressure loss coefficients were calculated in the nominal mode and in modes other than the calculated one. The obtained data are plotted on graphs and the characteristics of the KSK operation in different operating modes are plotted. Initially, with the help of direct optimization, the output cross-sectional area was obtained, providing the necessary speed at the exit from the KSK.Â And the following multiparametric optimization over the response surface, the objective function of which was to reduce the coefficient of loss of total pressure in the annular cavity minus mixing losses in the outlet pipe. The approach to calculating mixing losses without taking into account friction is described in the work. With it, it is possible to analytically subtract the loss of friction against the channel walls, but at the same time take into account the unevenness of the flow behind the KSK. The object of multiparametric optimization is a high-output stage with Ð¤ = 0.15 and ÏT = 0.45. Using the Ansys CAE package, a new KSK geometry was obtained, which has a full pressure loss coefficient 16% lower in the design mode than in the original version and from 2 to 10% lower in the rest of the characteristic. Modeling of the entire work area made it possible to comprehensively assess the reduction of the loss coefficient, and not the shift of the work area. The data obtained as a result of the work can be applied to optimize other facilities, as well as to correct and adjust the model of the primary design of centrifugal compressor stages.