Log in

Relevant bibliographies by topics / Vaneless diffusers / Journal articles

To see the other types of publications on this topic, follow the link: Vaneless diffusers.

Journal articles on the topic 'Vaneless diffusers'

Author: Grafiati

Published: 6 September 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Vaneless diffusers.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Калінкевич, Микола Васильович, та Микола Іванович Радченко. "ЗБІЛЬШЕННЯ ДІАПАЗОНУ СТІЙКОЇ РОБОТИ СТУПЕНЯ ВІДЦЕНТРОВОГО КОМПРЕСОРА З БЕЗЛОПАТКОВИМ ДИФУЗОРОМ". Aerospace technic and technology, № 6 (24 грудня 2019): 4–9. http://dx.doi.org/10.32620/aktt.2019.6.01.

Full text

Abstract:

Centrifugal compressors often operate at different capacities, so it is important to ensure their stable operation over a wide flow range. Stages with vaneless diffusers have several advantages compared to stages with other types of diffusers: they are more technologically advanced to manufacture, and more uniform pressure distribution behind the impeller improves the dynamics of the rotor. At low flows, due to the occurrence of a rotating stall and surge, the efficiency of stages with vaneless diffusers rapidly decreases. The occurrence of unstable operating modes of centrifugal compressor st

APA, Harvard, Vancouver, ISO, and other styles

2

Galerkin, Y. B., A. F. Rekstin, and O. A. Solovyeva. "Selecting the Dimensions of the Vaneless Diffuser of a Centrifugal Compressor Stage at the Primary Design Phase." Proceedings of Higher Educational Institutions. Маchine Building, no. 10 (715) (October 2019): 43–57. http://dx.doi.org/10.18698/0536-1044-2019-10-43-57.

Full text

Abstract:

The advances in the primary design method of centrifugal compressors of the Universal Modeling Method have led to the need to analyze and revise the recommendations for the optimal size and configuration selection of vaneless diffusers of centrifugal compressor stages. The results of CFD calculations of a family of vaneless diffusers with different relative width, radial length, velocity coefficients and flow angles at the inlet are used to develop new recommendations. The choice of the optimal width of the vaneless diffuser is based on ensuring a non-separable flow in it at the boundary of th

APA, Harvard, Vancouver, ISO, and other styles

3

Zhang, Qian, Liang Zhang, Qiuhong Huo, and Lei Zhang. "Study on Two Types of Stall Patterns in a Centrifugal Compressor with a Wide Vaneless Diffuser." Processes 8, no. 10 (2020): 1251. http://dx.doi.org/10.3390/pr8101251.

Full text

Abstract:

Two types of stall patterns in the centrifugal compressor with a wide vaneless diffuser were numerically studied in this paper. We carried out kinds of three-dimensional numerical simulations of the instability process in wide vaneless diffusers with different radius ratios. The results show that there are two kinds of stall patterns in wide vaneless diffusers with different radius ratios. For a short diffuser with a radius ratio of 1.5, the speed of the propagation of stalled cells is relatively high, and the propagation speed and frequency of stall cells do not change with the decrease in th

APA, Harvard, Vancouver, ISO, and other styles

4

Engeda, A. "The design and performance results of simple flat plate low solidity vaned diffusers." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 215, no. 1 (2001): 109–18. http://dx.doi.org/10.1243/0957650011536471.

Full text

Abstract:

Vaned diffusers for centrifugal compressors have decades of development history, but most of it is of a proprietary and empirical nature. Centrifugal compressor designers are continuously searching for a diffuser system that combines the good qualities of vaneless and vaned diffuser systems. Vaneless diffusers are known to possess wide operating range with relatively low efficiency while current conventional vaned diffusers have narrow range and high efficiency. The low solidity vaned diffuser (LSVD) has shown good performance from both range and efficiency standpoints. Its relatively high eff

APA, Harvard, Vancouver, ISO, and other styles

5

Zhu, Xiaocheng, Chenxing Hu, and Zhaohui Du. "Formation and suppression of the instability in radial vaneless diffusers." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 233, no. 12 (2019): 4606–22. http://dx.doi.org/10.1177/0954410019827390.

Full text

Abstract:

The change of width radius ratio may lead to different physical mechanisms for the instabilities in vaneless diffusers. Reynolds-averaged Navier–Stokes numerical simulations were performed and the results were used to present the mean flow. A quasi-laminar mixed approach based was applied on the vaneless diffusers with narrow and moderate width. The frequency of the perturbations in the vaneless diffuser flow with different axial widths was validated against the experimental data. Moreover, in order to reveal the wavemaker region, the structural sensitivity analysis of the vaneless diffuser fl

APA, Harvard, Vancouver, ISO, and other styles

6

Seralathan, S., and D. G. Roy Chowdhury. "Numerical Study on the Effect of Free Rotating Vaneless Diffuser of Exit Diameter to Inlet Diameter Ratio 1.3 with Speed Ratio 0.50 on Centrifugal Compressor Performance." Applied Mechanics and Materials 813-814 (November 2015): 1063–69. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.1063.

Full text

Abstract:

Innovative methods in the design of radial diffuser are necessary for reducing the energy losses associated with diffusion in order to design an efficient centrifugal compressor. Rotating vaneless diffusers is one such concept, in which a particular type, free rotating vaneless diffuser, the diffuser speed becomes a fraction of the rotating impeller speed and rotates independently. In this paper, an impeller with stationary vaneless diffuser alone of diffuser diameter ratio 1.40 and the same impeller with a freely rotating vaneless diffuser of diffuser diameter ratio 1.30 along with stationary

APA, Harvard, Vancouver, ISO, and other styles

7

Solovyeva, О. А., А. А. Drozdov, E. Yu Popova, and K. V. Soldatova. "CFD-model of Vaneless Diffuser of Centrifugal Compressor." Herald of the Bauman Moscow State Technical University. Series Mechanical Engineering, no. 2 (137) (June 2021): 109–30. http://dx.doi.org/10.18698/0236-3941-2021-2-109-130.

Full text

Abstract:

The centrifugal compressor design involves the use of approximate engineering techniques based on mathematical modeling. One of such techniques is the universal modeling method, which proves to be practically applicable. Having generalized a series of CFD calculations, we used a mathematical model in the latest version of the compressor model to calculate flow parameters in vaneless diffusers. The diffuser model was identified based on the results of experimental studies of average-flow model stages carried out at SPbPU. The model is also used to calculate Clark low-flow centrifugal compressor

APA, Harvard, Vancouver, ISO, and other styles

8

Pinarbasi, A., and M. W. Johnson. "Three-Dimensional Flow Measurements in Conical and Straight Wall Centrifugal Compressor Vaneless Diffusers." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 210, no. 1 (1996): 51–61. http://dx.doi.org/10.1243/pime_proc_1996_210_169_02.

Full text

Abstract:

In the current work three-dimensional flow measurements in two types of centrifugal compressor vaneless diffuser were obtained using hot wire anemometry. The first diffuser was conical, designed to give a constant flow area, while the second straight wall diffuser had a constant axial width. Measurements of mean velocity, flow angle and velocity fluctuation level were obtained on eight cross-sectional planes in each diffuser. The jet-wake flow pattern and the impeller blade wakes are clearly visible at the inlet of both diffusers. Mixing out of the blade wake proceeds more rapidly in the strai

APA, Harvard, Vancouver, ISO, and other styles

9

Dou, H. S., and S. Mizuki. "Analysis of the Flow in Vaneless Diffusers With Large Width-to-Radius Ratios." Journal of Turbomachinery 120, no. 1 (1998): 193–201. http://dx.doi.org/10.1115/1.2841381.

Full text

Abstract:

The flow in vaneless diffusers with large width-to-radius ratios is analyzed by using three-dimensional boundary-layer theory. The variations of the wall shear angle in the layer and the separation radius of the turbulent boundary layer versus various parameters are calculated and compared with experimental data. The effect of the separation point on the performance of vaneless diffusers and the mechanism of rotating stall are discussed. It is concluded that when the flow rate becomes very low, the reverse flow zone on the diffuser walls extends toward the entry region of diffusers. When the r

APA, Harvard, Vancouver, ISO, and other styles

10

Zhang, Qian, Qiuhong Huo, Lei Zhang, Lei Song, and Jianmeng Yang. "Effect of Vaneless Diffuser Shape on Performance of Centrifugal Compressor." Applied Sciences 10, no. 6 (2020): 1936. http://dx.doi.org/10.3390/app10061936.

Full text

Abstract:

The influence of four different vaneless diffuser shapes on the performance of centrifugal compressors is numerically studied in this paper. One of the studied shapes was a parallel wall diffuser. Two others had the width reduced only from hub and shroud and the rest had the width reduced from hub and shroud divided evenly. Then the numerical simulation was employed and the overall compressor aerodynamic performance was studied. The detailed velocity and pressure distribution and energy loss within the centrifugal compressor with different diffuser geometries and different operating conditions

APA, Harvard, Vancouver, ISO, and other styles

11

Gao, Chuang, Chuangang Gu, Tong Wang, and Bo Yang. "Analysis of Geometries' Effects on Rotating Stall in Vaneless Diffuser with Wavelet Neural Networks." International Journal of Rotating Machinery 2007 (2007): 1–10. http://dx.doi.org/10.1155/2007/76476.

Full text

Abstract:

Wavelet neural network (WNN), which combines the capability of neural network in learning from process and that of wavelet decomposition, was used to study geometry factors on rotating stall in vaneless diffusers. A new error function called cross entropy squared (CSE) function was derived and put forward for the purpose of convergence acceleration. WNN was trained and validated with experimental data from literature. Comparison results showed the reliability. With the trained WNN, detailed investigation was carried out mainly to understand the effects of impeller blade number, blade-exit angl

APA, Harvard, Vancouver, ISO, and other styles

12

Solovyeva, Olga, and Aleksandr Drozdov. "Mathematical model of centrifugal compressor vaneless diffuser based on CFD calculations." E3S Web of Conferences 178 (2020): 01014. http://dx.doi.org/10.1051/e3sconf/202017801014.

Full text

Abstract:

The approximate engineering techniques based on mathematical modelling are used in centrifugal compressor design. One of such methods is the well-proven Universal Modelling Method, developed in the scientific and research laboratory “Gas dynamics of turbo machines”, SPbPU. In the modern version of the compressor model, vaneless diffusers mathematical model was applied based on a generalization of the CFD calculations. The mathematical model can be used for vaneless diffusers with a relative width in the range of 1.4 – 10.0%, with a radial length up to 2.0, in the range of inlet flow angles 10

APA, Harvard, Vancouver, ISO, and other styles

13

Ljevar, S., H. C. de Lange, and A. A. van Steenhoven. "Two-Dimensional Rotating Stall Analysis in a Wide Vaneless Diffuser." International Journal of Rotating Machinery 2006 (2006): 1–11. http://dx.doi.org/10.1155/ijrm/2006/56420.

Full text

Abstract:

We report a numerical study on the vaneless diffuser core flow instability in centrifugal compressors. The analysis is performed for the purpose of better understanding of the rotating stall flow mechanism in radial vaneless diffusers. Since the analysis is restricted to the two-dimensional core flow, the effect of the wall boundary layers is neglected. A commercial code with the standard incompressible viscous flow solver is applied to model the vaneless diffuser core flow in the plane parallel to the diffuser walls. At the diffuser inlet, rotating jet-wake velocity pattern is prescribed and

APA, Harvard, Vancouver, ISO, and other styles

14

Abdel-Hamid, A. N. "A New Technique for Stabilizing the Flow and Improving the Performance of Vaneless Radial Diffusers." Journal of Turbomachinery 109, no. 1 (1987): 36–40. http://dx.doi.org/10.1115/1.3262067.

Full text

Abstract:

Experiments were conducted to investigate the effects of using small exit vanes on the characteristics of an otherwise vaneless radial diffuser of outer radius and width-to-inlet radius ratios of 1.75 and 0.116, respectively. The steady and unsteady characteristics of the diffuser were evaluated as the angle of the vanes was varied continuously at several diffuser inlet conditions. The measurements showed that the influence of the adjustable exit vanes on the diffuser flow field increased as the diffuser inlet flow angle was decreased. Elimination of the self-excited flow oscillations in the d

APA, Harvard, Vancouver, ISO, and other styles

15

Galerkin, Y. B., A. G. Nikiforov, O. A. Solovyeva, and E. Y. Popova. "Simulating Characteristics of Vaneless Diffusers Using Neural Networks." Proceedings of Higher Educational Institutions. Маchine Building, no. 07 (724) (July 2020): 29–42. http://dx.doi.org/10.18698/0536-1044-2020-7-29-42.

Full text

Abstract:

To calculate flow parameters of a vaneless diffuser of the centrifugal compressor stage, it is sufficient to determine the loss coefficient and the flow direction at the outlet. The paper presents the results of modeling the characteristics of these two parameters using neural networks and CFD methods. To obtain mathematical models, ANSYS calculation data was used for vaneless diffusers with a relative width of 0.014–0.1, relative outlet diameter of 1.4–2.0, inlet flow angle of 10–90° and velocity coefficient of 0.39–0.82, with the Reynolds number being in the range of 87 500–1 030 000. A comp

APA, Harvard, Vancouver, ISO, and other styles

16

Shen, F., H. Chen, and X.-C. Zhu. "A three-dimensional vaneless diffuser stall model." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 224, no. 9 (2010): 1933–45. http://dx.doi.org/10.1243/09544062jmes1985.

Full text

Abstract:

A three-dimensional (3D) model is presented to study the occurrence of weak rotating waves in vaneless diffusers of centrifugal compressors. The model is an extension of the 2D one developed by Moore. 3D incompressible linearized Euler equations are cast on a rotating frame of reference travelling at the same circumferential speeds as the waves and the viscous effects are ignored. The diffuser is assumed to have two parallel walls and discharge into a large plenum. Solutions to the equations are obtained by a finite difference method and the singular value decomposition technique. Disturbances

APA, Harvard, Vancouver, ISO, and other styles

17

Hayami, H., Y. Senoo, and K. Utsunomiya. "Application of a Low-Solidity Cascade Diffuser to Transonic Centrifugal Compressor." Journal of Turbomachinery 112, no. 1 (1990): 25–29. http://dx.doi.org/10.1115/1.2927416.

Full text

Abstract:

Low-solidity circular cascades, conformally transformed from high-stagger linear cascades of double-circular-arc vanes with solidity 0.69, were used as a part of the diffuser system of a transonic centrifugal compressor. Performance test results were compared with data of the same compressor with a vaneless diffuser. Good compressor performance and a wider flow range as well as a higher pressure ratio and a higher efficiency, superior to those with a vaneless diffuser, where the flow range was limited by choke of the impeller, were demonstrated. The test circular cascade diffusers demonstrated

APA, Harvard, Vancouver, ISO, and other styles

18

Tsurusaki, Hiromu. "Effects of Diffuser Geometry on Rotating Stall in Vaneless Diffusers." Transactions of the Japan Society of Mechanical Engineers Series B 59, no. 566 (1993): 3133–39. http://dx.doi.org/10.1299/kikaib.59.3133.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Sitaram, N., and J. M. Issac. "An experimental investigation of a centrifugal compressor with hub vane diffusers." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 211, no. 5 (1997): 411–27. http://dx.doi.org/10.1243/0957650971537312.

Full text

Abstract:

The present investigation reports results of experimental studies on a centrifugal compressor equipped with hub vane diffusers. The diffuser vane height ( h/b) is varied as follows: 0 (vaneless), 0.2, 0.3, 0.4 and 1 (vane). The experiments were carried out on a low specific speed centrifugal compressor with a radial tipped impeller with an inducer at the inlet. The measurements consist of determining performance characteristics, measuring static pressures on the hub and shroud and flow traverses with a precalibrated cobra probe at the diffuser exit over one passage at five flow coefficients, v

APA, Harvard, Vancouver, ISO, and other styles

20

Kinoshita, Y., and Y. Senoo. "Rotating Stall Induced in Vaneless Diffusers of Very Low Specific Speed Centrifugal Blowers." Journal of Engineering for Gas Turbines and Power 107, no. 2 (1985): 514–19. http://dx.doi.org/10.1115/1.3239761.

Full text

Abstract:

The limit of rotating stall was experimentally determined for three very small specific speed centrifugal blowers. The impellers were specially designed for stall-free at very small flow rates, so that the cause of rotating stall could be attributed to the vaneless diffusers. Experimental results demonstrated that the blowers did not stall until the flow coefficient was reduced to very small values, which had never been reported in the literature. The critical flow coefficient for rotating stall agreed very well with the prediction based on a flow analysis and a criterion for rotating stall in

APA, Harvard, Vancouver, ISO, and other styles

21

Zhu, Yingkang, and S. A. Sjolander. "Effect of Geometry on the Performance of Radial Vaneless Diffusers." Journal of Turbomachinery 109, no. 4 (1987): 550–56. http://dx.doi.org/10.1115/1.3262147.

Full text

Abstract:

The paper presents measurements of the steady aerodynamic characteristics of a series of five radial vaneless diffusers with walls varying from mildly divergent to strongly convergent. The static pressure recovery was determined and the flow was traversed at the inlet and the outlet of the diffuser for a broad range of flow rates in each case. It was found that wall convergence results in a negative (stabilizing) slope in the pressure rise curve for the diffuser. Furthermore, at high flow rates convergence was found to reduce the pressure recovery far less than one would expect and at intermed

APA, Harvard, Vancouver, ISO, and other styles

22

Sheng, Feng, Hua Chen, Xiao-cheng Zhu, and Zhao-hui Du. "A three-dimensional compressible flow model for rotating waves in vaneless diffusers with unparallel walls." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 226, no. 9 (2012): 2230–49. http://dx.doi.org/10.1177/0954406211435035.

Full text

Abstract:

A three-dimensional compressible flow model is presented to study the occurrence of weak rotating waves in unparallel wall vaneless diffusers in centrifugal compressors. The model extends the three-dimensional compressible flow model for parallel wall diffusers recently developed by present authors. Linearised three-dimensional compressible Euler equations casted on a rotating frame of reference travelling at the same speeds as the waves are employed and the viscous effects are ignored. Complex functions of the solutions to the linearised Euler equations are then obtained by a second-order fin

APA, Harvard, Vancouver, ISO, and other styles

23

Tsujimoto, Yoshinobu, Yoshiki Yoshida, and Yasumasa Mori. "Study of Vaneless Diffuser Rotating Stall Based on Two-Dimensional Inviscid Flow Analysis." Journal of Fluids Engineering 118, no. 1 (1996): 123–27. http://dx.doi.org/10.1115/1.2817489.

Full text

Abstract:

Rotating stalls in vaneless diffusers are studied from the viewpoint that they are basically two-dimensional inviscid flow instability under the boundary conditions of vanishing velocity disturbance at the diffuser inlet and of vanishing pressure disturbance at the diffuser outlet. The linear analysis in the present report shows that the critical flow angle and the propagation velocity are functions of only the diffuser radius ratio. It is shown that the present analysis can reproduce most of the general characteristics observed in experiments: critical flow angle, propagation velocity, veloci

APA, Harvard, Vancouver, ISO, and other styles

24

Petukhov, E. P., Y. B. Galerkin, and A. F. Rekstin. "A Study of Testing Procedures of Vaned Diffusers of a Centrifugal Compressor Stage in a Virtual Wind Tunnel." Proceedings of Higher Educational Institutions. Маchine Building, no. 8 (713) (August 2019): 51–64. http://dx.doi.org/10.18698/0536-1044-2019-8-51-64.

Full text

Abstract:

A mathematical model of a vaned diffuser of a centrifugal compressor stage can be constructed based on the results of mass CFD-calculations, similar to that of vaneless diffusors. The methods for calculating the annular cascade and the straight cascade differ due to the existence of vaneless diffusor sections in front of the cascade and behind it. The rational dimensions of these sections are determined. The calculations of two-dimensional cascades without restricting walls appear to be irrational. The calculation is effective for a sector with one vane channel, a moderate number of cells, and

APA, Harvard, Vancouver, ISO, and other styles

25

Ogut, Ali, and Diego Garcia Pastor. "Simulation of Flow in Turbopump Vaneless and Vaned Diffusers with Fluid Injection." International Journal of Rotating Machinery 6, no. 1 (2000): 57–65. http://dx.doi.org/10.1155/s1023621x00000063.

Full text

Abstract:

In future space missions by NASA there will be a need for “Space Transfer Vehicles” to perform varying orbital transfers and descents. This requires engines capable of producing different levels of thrust. To accomplish this, the turbopumps employed in these engines should efficiently provide a wide range of flow outputs. However, current fuel and oxidizer turbopumps with vaned diffusers do not perform efficiently at off-design (low) flow rates mainly due to flow separation in the vaned diffuser.This paper evaluates the effectiveness of boundary layer control by fluid injection (blowing) for s

APA, Harvard, Vancouver, ISO, and other styles

26

Yoshinaga, Y., T. Kaneki, H. Kobayashi, and M. Hoshino. "A Study of Performance Improvement for High Specific Speed Centrifugal Compressors by Using Diffusers With Half Guide Vanes." Journal of Fluids Engineering 109, no. 4 (1987): 359–66. http://dx.doi.org/10.1115/1.3242672.

Full text

Abstract:

The experimental results from eighteen different centrifugal compressor stages showed that the pressure recovery of vaneless diffusers for high specific speed compressors was extremely low compared with the value expected by an ideal two-dimensional analysis. Consequently a new type of diffuser with half guide vanes on the shroud side wall was proposed. The pressure recovery of this diffuser at distorted inlet flow was considerably improved by the half guide vanes. The optimum height of the vanes was a little less than one half of the diffuser width. Measurements of the velocity distribution i

APA, Harvard, Vancouver, ISO, and other styles

27

KINOSHITA, Yoshifumi, Akihiro HAYASHI, and Syouzo TSUZUKI. "Mechanism of Stall Induced in Centrifugal Vaneless Diffusers." Proceedings of Conference of Kyushu Branch 2003 (2003): 231–32. http://dx.doi.org/10.1299/jsmekyushu.2003.231.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Galerkin, Y., K. Soldatova, and O. Solovieva. "Numerical study of centrifugal compressor stage vaneless diffusers." IOP Conference Series: Materials Science and Engineering 90 (August 10, 2015): 012048. http://dx.doi.org/10.1088/1757-899x/90/1/012048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

SAKAI, Toshimichi. "Vaneless Diffusers for Mixed-Flow Blower and Compressor." Journal of the Society of Mechanical Engineers 90, no. 820 (1987): 266–71. http://dx.doi.org/10.1299/jsmemag.90.820_266.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Arnulfi, G. L., D. Micheli, and P. Pinamonti. "Velocity Measurements Downstream of the Impellers in a Multistage Centrifugal Blower." Journal of Turbomachinery 117, no. 4 (1995): 593–601. http://dx.doi.org/10.1115/1.2836573.

Full text

Abstract:

The paper presents the results of an experimental investigation on a four-stage centrifugal blower, having the aim of obtaining an accurate description of the flow field behind the impellers in several operative conditions and for different geometric configurations. Actually, the test plant allows one to change the turbomachinery characteristics assembling one, two, three, or four stages and three different types of diffuser. In this first research step, the blower has been tested in the four-stage vaneless diffuser configuration. The unsteady flow field behind the impellers and in the diffuse

APA, Harvard, Vancouver, ISO, and other styles

31

Galerkin, Yuri, Aleksey Rekstin, Aleksandr Drozdov, Kristina Soldatova, Olga Solovyeva, and Elena Popova. "The optimal gas dynamic design system of industrial centrifugal compressors based on Universal modeling method." E3S Web of Conferences 178 (2020): 01028. http://dx.doi.org/10.1051/e3sconf/202017801028.

Full text

Abstract:

We present the modern stage of development of Universal Modeling Method, a complex of mathematical models and software for optimal design of centrifugal compressors - a new version of simplified mathematical model of efficiency and new software for variation calculations of multistage compressors. Based on this numerical calculation complex we have created a method for preliminary design of flow paths of stages - 2D and 3D impellers, vane and vaneless diffusers and return channels. The new, 9th version of its mathematical model features a quasi-3D calculation method of 2D and 3D impellers desi

APA, Harvard, Vancouver, ISO, and other styles

32

Justen, F., K. U. Ziegler, and H. E. Gallus. "Experimental Investigation of Unsteady Flow Phenomena in a Centrifugal Compressor Vaned Diffuser of Variable Geometry." Journal of Turbomachinery 121, no. 4 (1999): 763–71. http://dx.doi.org/10.1115/1.2836730.

Full text

Abstract:

The behavior of vaned radial diffusers is generally considered to be due to the flow phenomena in the vaneless and the semi-vaned space in the diffuser inlet region. Even considering unsteady aspects, the adjacent diffuser channel is regarded as less important. The flat wedge vaned diffuser of the centrifugal compressor stage investigated allows an independent continuous adjustment of the diffuser vane angle and the radial gap between impeller outlet and diffuser vane inlet, so that information about the importance of these geometric parameters can be obtained. The time-dependent pressure dist

APA, Harvard, Vancouver, ISO, and other styles

33

AWAI, Takashi, Tomohiro NAKAGAWA, and Toshimichi SAKAI. "A study of axially curved mixed-flow vaneless diffusers." Transactions of the Japan Society of Mechanical Engineers Series B 51, no. 470 (1985): 3370–75. http://dx.doi.org/10.1299/kikaib.51.3370.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Nikiforov, A., D. Avramenko, A. Kuchumov, S. Terentev, Yu Galerkin, and O. Solovyeva. "Vaneless diffusers characteristics simulating by means of neural networks." IOP Conference Series: Materials Science and Engineering 604 (September 3, 2019): 012046. http://dx.doi.org/10.1088/1757-899x/604/1/012046.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Jiang, P. M., and A. Whitfield. "Investigation of Vaned Diffusers as a Variable Geometry Device for Application to Turbocharger Compressors." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 206, no. 3 (1992): 209–20. http://dx.doi.org/10.1243/pime_proc_1992_206_179_02.

Full text

Abstract:

The potential of guide vanes as a variable geometry device, placed in the conventional vaneless diffuser, to extend the operating range of a turbocharger compressor is investigated. Vaned diffusers are not normally employed in turbocharger applications as the consequent reduction in operating range is more damaging than the beneficial improvement in peak efficiency and pressure ratio. The variable geometry concept considered here is primarily one in which the guide vanes are introduced at the near surge flow conditions. The leading edge vane angle is set to accept the highly tangential flow at

APA, Harvard, Vancouver, ISO, and other styles

36

Kim, Y., A. Engeda, R. Aungier, and N. Amineni. "A centrifugal compressor stage with wide flow range vaned diffusers and different inlet configurations." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 216, no. 4 (2002): 307–20. http://dx.doi.org/10.1243/09576500260251156.

Full text

Abstract:

In most cases, the diffuser system of a centrifugal compressor comes in the two general categories of a vaneless or a vaned diffuser. The vaned diffuser can generally be subdivided into two types depending on channel geometry (straight or curved channel) or depending on solidity. For the three different vaned diffusers of a centrifugal compressor stage, the design procedure is presented and experimental data are compared. The primary objective of the diffuser design was to achieve substantial improvement, compared with the stage currently used for the intended application, for the stable opera

APA, Harvard, Vancouver, ISO, and other styles

37

AWAI, Takashi, Tomohiro NAKAGAWA, and Toshimichi SAKAI. "A Study on the Axially Curved Mixed-flow Vaneless Diffusers." Bulletin of JSME 29, no. 252 (1986): 1759–64. http://dx.doi.org/10.1299/jsme1958.29.1759.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Solovyeva, O. A., K. V. Soldatova, Y. B. Galerkin, and A. F. Rekstin. "Primary Design of Vaneless Diffusers of Centrifugal Compressor Stages by the Universal Modeling Method." Proceedings of Higher Educational Institutions. Маchine Building, no. 3 (732) (March 2021): 39–52. http://dx.doi.org/10.18698/0536-1044-2021-3-39-52.

Full text

Abstract:

Vaneless diffusers of industrial centrifugal compressors most often consist of a tapered inlet section and a parallel-walled main section. The study proposes to choose such a width of the main section, at which the flow in the diffuser remains unseparated at the surge limit. To implement the primary design method, an empirical formula was obtained to determine the minimum continuous flow angle depending on the relative width of the diffuser. The primary design of eighteen stages was completed, covering a practically important range of parameters. The corresponding gas-dynamic characteristics w

APA, Harvard, Vancouver, ISO, and other styles

39

Shoji, H., and H. Ohashi. "Lateral Fluid Forces on Whirling Centrifugal Impeller (1st Report: Theory)." Journal of Fluids Engineering 109, no. 2 (1987): 94–99. http://dx.doi.org/10.1115/1.3242647.

Full text

Abstract:

Lateral fluid forces acting on a rotating centrifugal impeller in whirling motion are analyzed using unsteady potential flow theory. Impellers operating in diffusers with and without vanes are modeled and the fluid forces calculated for different whirl speeds and flow rates. The influences of these parameters are clarified by parametric calculations. The results for whirling impellers operating in vaneless diffusers show that the fluid forces exert a damping effect on the rotor whirling motion at all operating conditions. The results for impellers operating in vaned diffusers or guide vanes sh

APA, Harvard, Vancouver, ISO, and other styles

40

Pinarbasi, A., K. M. Guleren, and A. Ozturk. "Measurements of Reynolds stresses in centrifugal compressor vaned diffusers." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 222, no. 8 (2008): 1487–503. http://dx.doi.org/10.1243/09544062jmes877.

Full text

Abstract:

A phase lock loop sampling technique has been developed in order to perform detailed measurements for the flow field downstream of a turbomachinery rotor. Measurements have been carried out in the vaned diffuser of a low-speed centrifugal compressor using a triple hot wire anemometer. The phase lock loop technique employed in this work has provided a comprehensive representation of the complex three-dimensional unsteady flow in these diffusers. The diffuser vanes were found to have a significant influence on the flow in the vaneless space. The mixing out of the blade wakes is enhanced and acco

APA, Harvard, Vancouver, ISO, and other styles

41

Issac, J. M., N. Sitaram, and M. Govardhan. "Performance and wall static pressure measurements on centrifugal compressor diffusers." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 217, no. 5 (2003): 547–58. http://dx.doi.org/10.1243/095765003322407593.

Full text

Abstract:

The results of experimental studies on performance and wall static pressure distribution in the diffuser passage of a low specific speed centrifugal compressor are given. The performance tests were carried out with vaneless, vane and low-solidity vane diffusers at speeds of 2500, 3000 and 3500r/min. Diffuser wall static pressures measured at 3000r/min for four flow coefficients on the shroud and hub walls are reported. The peak energy coefficient is maximum for the vane diffuser. The operating range of the low-solidity vane diffuser is wider than that of the vane diffuser. At high flow coeffic

APA, Harvard, Vancouver, ISO, and other styles

42

Lu, Zhaoheng, Ran Tao, Faye Jin, Puxi Li, Ruofu Xiao, and Weichao Liu. "The Temporal-Spatial Features of Pressure Pulsation in the Diffusers of a Large-Scale Vaned-Voluted Centrifugal Pump." Machines 9, no. 11 (2021): 266. http://dx.doi.org/10.3390/machines9110266.

Full text

Abstract:

A large-scale, vaned-voluted centrifugal pump can be applied as the key component in water-transfer projects. Pressure pulsation will be an important factor in affecting the operation stability. This paper researches the propagation and spatial distribution law of blade passing frequency (BPF) and its harmonics on the design condition by numerical simulation. Experimental and numerical monitoring is conducted for pressure pulsation on four discrete points in the vaneless region, which shows that the BPF is dominant. The pulsation tracking network (PTN) is applied to research propagation law an

APA, Harvard, Vancouver, ISO, and other styles

43

Jaatinen-Värri, Ahti, Aki Grönman, Teemu Turunen-Saaresti, and Jari Backman. "Investigation of the Stage Performance and Flow Fields in a Centrifugal Compressor with a Vaneless Diffuser." International Journal of Rotating Machinery 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/139153.

Full text

Abstract:

The effect of the width of the vaneless diffuser on the stage performance and flow fields of a centrifugal compressor is studied numerically and experimentally. The diffuser width is varied by reducing the diffuser flow area from the shroud side (i.e., pinching the diffuser). Seven different diffuser widths are studied with numerical simulation. In the modeling, the diffuser widthb/b2is varied within the range 1.00 to 0.50. The numerical results are compared with results obtained in previous studies. In addition, two of the diffusers are further investigated with experimental measurement. The

APA, Harvard, Vancouver, ISO, and other styles

44

Hu, Chenxing, Ce Yang, Xin Shi, Runnan Zou, Lin Liu, and Hua Chen. "Investigation of rotating stall in radial vaneless diffusers with asymmetric inflow." Aerospace Science and Technology 96 (January 2020): 105546. http://dx.doi.org/10.1016/j.ast.2019.105546.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Furukawa, Akinori, Hisasada Takahara, Takahiro Nakagawa, and Yusuke Ono. "Pressure Fluctuation in a Vaned Diffuser Downstream from a Centrifugal Pump Impeller." International Journal of Rotating Machinery 9, no. 4 (2003): 285–92. http://dx.doi.org/10.1155/s1023621x03000265.

Full text

Abstract:

Periodic flows downstream from a centrifugal pump impeller in vaneless and vaned diffusers were measured by using a single hole yawmeter and a phase-locked sampling method. The flows were also calculated by an inviscid flow analysis using the blade-surface singularity method. The periodic variations in calculated static pressure with the impeller rotating quantitatively agree well with the measured ones. The flow behaviors in the vaned diffuser are discussed, citing measured and calculated results. The potential interaction between the impeller and the diffuser blades appears more strongly tha

APA, Harvard, Vancouver, ISO, and other styles

46

Amirante, R., F. De Bellis, E. Distaso, and P. Tamburrano. "An Explicit, Non-Iterative, Single Equation Formulation for an Accurate One Dimensional Estimation of Vaneless Radial Diffusers in Turbomachines." Journal of Mechanics 31, no. 2 (2014): 113–22. http://dx.doi.org/10.1017/jmech.2014.72.

Full text

Abstract:

AbstractThe present paper proposes a very simple one dimensional (1-D) model that accounts for the energy loss caused by the fluid dynamic losses occurring in the vaneless diffusers of centrifugal compressors and pumps. Usually, the present techniques to design turbomachines (pumps, compressors and turbines) emphasize numerical methods and their use is relatively complex because several parameters need to be chosen and a lot of time is required to perform the calculation. For this reason, it is relevant to perform an accurate preliminary design to simplify the numerical computation phase and t

APA, Harvard, Vancouver, ISO, and other styles

47

Eynon, P. A., and A. Whitfield. "The effect of low-solidity vaned diffusers on the performance of a turbocharger compressor." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 211, no. 5 (1997): 325–39. http://dx.doi.org/10.1243/0954406971522088.

Full text

Abstract:

The design of low-solidity diffuser vanes and the effect on the performance of a turbo-charger compressor is discussed. The effect of vane number and turning angle was investigated while maintaining a basic design with a solidity of 0.69 and a leading edge angle of 75°. This large leading edge angle was specifically chosen so that the vane would be aligned with the low flowrates close to surge. Tests were initially conducted with six, eight and ten vanes and a turning angle of 10°. Based on these results the ten-vane design was selected for further investigation with 15 and 20° of vane turning

APA, Harvard, Vancouver, ISO, and other styles

48

Hong, S. S., and S. H. Kang. "Effect of circumferential outlet distortion on the flow characteristics at the impeller exit of a centrifugal pump." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 215, no. 9 (2001): 1083–93. http://dx.doi.org/10.1177/095440620121500909.

Full text

Abstract:

Centrifugal impellers are exposed to downstream circumferential outlet distortions due to non-axisymmetric volutes or diffusers. This paper explores the effect of circumferential outlet distortion on the flow characteristics at the impeller exit of a centrifugal pump. A fence with non-uniform height was installed at the vaneless diffuser exit to create the outlet distortion, and then unsteady velocity and static pressure were measured at the impeller exit. The instantaneous and mean flow fields at the impeller exit varied with the circumferential position. Plots of the flows against the local

APA, Harvard, Vancouver, ISO, and other styles

49

Tamaki, H., H. Nakao, and M. Saito. "The Experimental Study of Matching Between Centrifugal Compressor Impeller and Diffuser." Journal of Turbomachinery 121, no. 1 (1999): 113–18. http://dx.doi.org/10.1115/1.2841218.

Full text

Abstract:

The centrifugal compressor for a marine use turbocharger with its design pressure ratio of 3.2 was tested with a vaneless diffuser and various vaned diffusers. Vaned diffusers were chosen to cover impeller operating range as broad as possible. The analysis of the static pressure ratio in the impeller and the diffusing system, consisting of the diffuser and scroll, showed that there were four possible combinations of characteristics of impeller pressure ratio and diffusing system pressure ratio, The flow rate, QP, where the impeller achieved maximum static pressure ratio, was surge flow rate of

APA, Harvard, Vancouver, ISO, and other styles

50

Cui, Michael M. "Comparative Study of Unsteady Flows in a Transonic Centrifugal Compressor with Vaneless and Vaned Diffusers." International Journal of Rotating Machinery 2005, no. 1 (2005): 90–103. http://dx.doi.org/10.1155/ijrm.2005.90.

Full text

Abstract:

To reduce vibration and noise level, the impeller and diffuser blade numbers inside an industrial compressor are typically chosen without common divisors. The shapes of volutes or collectors in these compressors are also not axis-symmetric. When impeller blades pass these asymmetric structures, the flow field in the compressor is time-dependent and three-dimensional. To obtain a fundamental physical understanding of these three-dimensional unsteady flow fields and assess their impact on the compressor performance, the flow field inside the compressors needs to be studied as a whole to include

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!