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Journal articles on the topic 'Centrifugal blower'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Pramuhadi, Gatot, Zavira Mega Ayu, and Ahmad Jaelani Sidik. "Desain dan Analisis Kinerja Air Blower Kipas Sentrifugal untuk Pengendalian Gulma." Jurnal Agricultural Biosystem Engineering 3, no. 2 (2024): 183. http://dx.doi.org/10.23960/jabe.v3i2.9245.

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This study aims to design and analyze the performance of the centrifugal fan water for weed control and compare it with the performance of air blowers that use axial fans. This study consists of three stages, namely design and manufacturing, testing in the laboratory, as well as testing for controlling dry land weeds in the field. There are 6 treatments tested, namely a combination of two types of fans (axial and centrifugal) and three types of cone nosel (4 holes, 5 holes, and 6 holes). The results showed that the centrifugal fan air blower displays good performance according to functional de

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2

Fang, Jiwei, Peigang Yan, Jiang Qin, and Huanlong Chen. "Research on Centrifugal Blower Design and Optimization Method Based on Mean Camber Line Optimization and CFD." Journal of Physics: Conference Series 2419, no. 1 (2023): 012062. http://dx.doi.org/10.1088/1742-6596/2419/1/012062.

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Abstract In recent years, with the development of domestic industry and the progress of production technology, the centrifugal blower, as a piece of nuclear equipment in the industry, needs to be upgraded and optimized to improve its performance. Thus, based on the mean camber line optimization and CFD, this paper carries out the design and aerodynamic optimization for a centrifugal blower, and a corresponding 3D aerodynamic optimization platform is built. Then the effects the mean camber lines have on the aerodynamic performance of the centrifugal blower are further analyzed. The results show

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3

Demircioglu, Pinar, Ismail Bogrekci, Berkay Sert, Mujtaba Abbakar, and Ahmet Gogebakan. "Effect of vaned and vaneless diffuser on the performance of turbo blowers." Engineering review 44, no. 3 (2024): 139–48. https://doi.org/10.30765/er.2532.

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The design of the diffuser significantly impacts the efficiency and overall performance of turbo blowers. The choice of diffuser type in centrifugal compressors and turbo blowers impacts efficiency. Vaned diffusers perform best at high flow rates but lose efficiency at lower flows due to their fixed design. Vaneless diffusers, without fixed blades, adapt better to varying flow rates and excel at part-load conditions. Therefore, vaned diffusers are ideal for applications with constant high flow rates, while vaneless diffusers offer efficiency advantages in variable flow rate applications. HAUS

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4

Ammed, Sohail. "Low noise centrifugal blower." Journal of the Acoustical Society of America 100, no. 1 (1996): 27. http://dx.doi.org/10.1121/1.415904.

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5

Aslamova, V. S., O. A. Troshkin, and A. N. Sherstyuk. "Centrifugal blower-dust collector." Chemical and Petroleum Engineering 23, no. 4 (1987): 187–89. http://dx.doi.org/10.1007/bf01149343.

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6

Peng, Li Xia. "On the Design Method of Noise Reduction of Centrifugal Fan." Advanced Materials Research 487 (March 2012): 520–24. http://dx.doi.org/10.4028/www.scientific.net/amr.487.520.

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The application of centrifugal fan is wide, but the huge noise can pollute the environment. This paper will discuss the mechanism of centrifugal blower noise generation, and put forward noise reduction method in designing centrifugal blower creatively, thus can solve the problems effectively.

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7

Abdel-Hamid, A. N. "Dynamic Response of a Centrifugal Blower to Periodic Flow Fluctuations." Journal of Engineering for Gas Turbines and Power 108, no. 1 (1986): 77–82. http://dx.doi.org/10.1115/1.3239888.

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Experimental investigation of the dynamic response of a centrifugal blower to periodic flow rate modulations was carried out at different blower operating conditions. For modulation frequencies in the range of 0.0085–0.085 of the shaft rotation frequency, the fluctuating pressures at inlet, discharge, and across a flow orifice were simultaneously measured and analyzed in the time and frequency domains. Measurements of the amplitude and phase of the transfer function between the blower static pressure rise and the discharge flow rate fluctuations indicated that the quasi-steady approximation sh

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8

Prezelj, J., and M. Čudina. "Quantification of aerodynamically induced noise and vibration-induced noise in a suction unit." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 225, no. 3 (2011): 617–24. http://dx.doi.org/10.1243/09544062jmes2187.

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Noise, generated by a centrifugal blower, can be divided according to its origin, into aerodynamically induced noise and vibration-induced noise. The contribution of the individual noise source to the total emitted noise is hard to determine, but it is crucial for the design of noise reduction measures. In order to reduce the noise of the centrifugal blower in a broad range of operating conditions, an identification of noise sources needs to be performed. An analysis of the most important noise origin in a centrifugal blower presented in this article was performed by measurements of the transf

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9

Thoharudin, THA Santosa, HN Irawan, and HT Waloyo. "Investigation of Blade Number Effect on the Centrifugal Blower as a Small-Scale Water Turbine." Journal of Physics: Conference Series 2989, no. 1 (2025): 012008. https://doi.org/10.1088/1742-6596/2989/1/012008.

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Abstract This study presents a simulation analysis of the impeller blade number effect on the air centrifugal blower performed as the water turbine at a small scale. A centrifugal air blower with a size of two inches was modified by varying its impeller blade number to 5, 6, and 7 blades and tested underwater flow having three meters of elevation. Moreover, three different rotational speeds (185, 370, and 570 rpm) were evaluated. The impeller was installed in reverse to improve the blade’s aerodynamic performance. The results show that more water flowed around one and a half-fold in the simula

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10

Chen, Jian Dong, and Bei Bei Sun. "Optimization of Low-Noise and Large Air Volume Blower Based on Load Characteristic." Key Engineering Materials 656-657 (July 2015): 700–705. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.700.

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The blower is a kind of garden machinery, which blows strong wind to clean up leaves by a centrifugal fan, but it causes a loud aerodynamic noise. To compromise the contradiction between large air flow rate and low fan noise, some optimizations are proposed to reduce fan noise without lowering its air volume. In this paper, a CFD numerical model to compute airflow field of blower is established, where the centrifugal fan is simulated by the MRF model, and theturbulent model is selected. By smoothing the transition section, improving the volute tongue and optimizing the shape and optimizing num

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11

Sun, Pan, Xiaoliang Wang, and Weicheng Xie. "Centrifugal Blower of Stratospheric Airship." IEEE Access 6 (2018): 10520–29. http://dx.doi.org/10.1109/access.2018.2809707.

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12

Hu, Zhi Xin, Yun Bin Ma, Shuai Huan, and Yu Chun Zhen. "Research on Fiber Bragg Grating Sensor Monitoring Method for Dynamical Stress of Centrifugal Blower Vane." Advanced Materials Research 383-390 (November 2011): 5222–26. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.5222.

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Monitoring method for dynamical stress of centrifugal blower vane based on Fiber Bragg Grating (FBG) sensing technique is presented in this paper. Consisting of FBG sensors, FBG interrogator and fiber optic rotary joint, this monitoring system has bare FBG as strain sensor, monitors stresses at the inlet and outlet of the centrifugal blower. Details about stick up method of FBG sensors are shown in this paper, either. In addition, this method has been applied to experimental model of centrifugal blower, and it was found that: stress at the outlet of the air vane is more than that at the inlet;

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13

Aigboje, E. O., and A. M. Odiamenhi. "Design and Fabrication of Centrifugal Blower using Locally Sourced Materials." Journal of Electrical, Control and Technological Research 3 (November 30, 2021): 11–19. http://dx.doi.org/10.37121/jectr.vol3.118.

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This paper deals with the design and fabrication of a centrifugal blower. A backwards-curved blower was employed in the study, because the backwards-inclined blower is highly efficient, operates at approximately twice the speed of a forward-curved air blower, and is suitable for high-state pressure applications. The design consideration and analysis concerned within this study is for a single-stage centrifugal blower with capacity, Q (0.317m3/min) at a pressure, P (10,000Pa), head, H (61.87m), and shaft speed, N (1450rpm). The lowest air volumetric rate of 0.073 m3s-1 was obtained at closing t

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14

Kim, Jae-Won. "Centrifugal Blower with High Inlet Resistance." Journal of Fluid Machinery 6, no. 2 (2003): 15–22. http://dx.doi.org/10.5293/kfma.2003.6.2.015.

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15

Gherman, B., M. Gall, V. A. Popa, and V.-A. Sterie. "IGV position optimization for centrifugal blower." IOP Conference Series: Materials Science and Engineering 400 (September 18, 2018): 042025. http://dx.doi.org/10.1088/1757-899x/400/4/042025.

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16

FUNAZAKI, Ken-ichi, Hiromasa KATO, and Takeshi HONDA. "Unsteady Flow analysis of Centrifugal Blower." Proceedings of the Fluids engineering conference 2016 (2016): 0917. http://dx.doi.org/10.1299/jsmefed.2016.0917.

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17

CHENGQIAN, DONG, and Hiroshi SUGIYAMA. "Noise sources for turbofan centrifugal blower." Proceedings of Conference of Kansai Branch 2020.95 (2020): P_049. http://dx.doi.org/10.1299/jsmekansai.2020.95.p_049.

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18

Aleshkov, Denis, Pavel Korchagin, Irina Teterina, and Anton Letopolsky. "Algorithm for calculating the profile of the feeder cutting band rotary snow blower." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 11, no. 1 (2025): 9–16. https://doi.org/10.22281/2413-9920-2025-11-01-09-16.

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The article reflects the calculation schemes for the movement of a snow particle along the surface of the cutting strip and the calculation scheme for determining the angle of inclination of the cutting strip of the feeder of a rotary snow blower. The relationships that determine the direction of action of the centrifugal force projections and the conditions that determine the nature of the equations of motion of a snow particle along the cutting strip and the possible phase states of the mechanical system “cutter of the vertical feeder of a rotary snow blower – transported snow particle” are

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19

Pramuhadi, Gatot, Josua Natanael, and Nenda Fuji Putri Daliesta. "Study of Spray Fogging Performance Using a Combination of Fogging Machine, Electric Sprayer, and Air Blower." Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) 14, no. 3 (2025): 866. https://doi.org/10.23960/jtep-l.v14i3.866-878.

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This study aims to determine and analyze the parameters of spray fogging performance for the application of pesticide fog. Air blower spraying performance can be increased by regulating the type of fan and type of air blower. Setting the type of fan in air blower is axial fan and centrifugal combined with cone of 4, 6, and 8 holes. The most optimum combination of the test treatment is the combination of axial fan air blower and 4-hole cone. Spray fogging can be increased by adjusting the combination spray angle between fogging machines and air blowers at various observation distances. The comb

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20

Banks, Christopher L., and Sean F. Wu. "Prediction and reduction of centrifugal blower noises." Journal of the Acoustical Society of America 103, no. 5 (1998): 3045. http://dx.doi.org/10.1121/1.422620.

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21

FUKUTOMI, Junichiro, Akiyoshi ITABASHI, and Yasutoshi SENOO. "Pressure Recovery in a Centrifugal Blower Casing." JSME International Journal Series B 49, no. 1 (2006): 125–30. http://dx.doi.org/10.1299/jsmeb.49.125.

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22

Baloni, Beena Devendra, Salim Abbasbhai Channiwala, and Sugnanam Naga Ramannath Harsha. "Design, Development and Analysis of Centrifugal Blower." Journal of The Institution of Engineers (India): Series C 99, no. 3 (2017): 277–84. http://dx.doi.org/10.1007/s40032-017-0356-z.

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23

Pshik, V. R. "Pressure gradient regulator for centrifugal blower seals." Chemical and Petroleum Engineering 26, no. 4 (1990): 198–200. http://dx.doi.org/10.1007/bf01147900.

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24

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.

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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

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25

Wu, Sean. "On sound generation mechanism by a centrifugal blower." Journal of the Acoustical Society of America 111, no. 5 (2002): 2424. http://dx.doi.org/10.1121/1.4778289.

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26

Baloni, Beena D., Yogesh Pathak, and S. A. Channiwala. "Centrifugal blower volute optimization based on Taguchi method." Computers & Fluids 112 (May 2015): 72–78. http://dx.doi.org/10.1016/j.compfluid.2015.02.007.

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27

Akanova, G., A. Sadkowski, S. Podbolotov, A. Kolga, and I. Stolpovskikh. "Ways to reduce hydraulic losses in multistage centrifugal pumping equipment for mining and oil-producing industries." Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, no. 6 (2021): 77–84. http://dx.doi.org/10.33271/nvngu/2021-6/077.

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Purpose. To study hydraulic losses in pumping units during pumping and transportation of liquids, to develop the design and technology solutions to improve the energy efficiency of centrifugal pumps in the mining and oil-producing industries. Methodology. In the theoretical and experimental analysis of hydraulic losses during the transportation of liquids, the hydraulics and experimental analysis methods were used. Findings. As a result of the research carried out, a new design scheme of a multistage centrifugal pump has been developed, providing a coaxial arrangement of impellers, which allow

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28

Kryłłowicz, Władysław, Michał Kuczkowski, and Krzysztof Sobczak. "Design and Experimental and Numerical Verifications of the Recirculating Blower for Long-Term Tests of Turbine Flowmeters." Archive of Mechanical Engineering 61, no. 1 (2014): 75–88. http://dx.doi.org/10.2478/meceng-2014-0004.

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Abstract A design of the centrifugal recirculation blower as well as results of its experimental and numerical investigations are presented in this paper. The blower was designed to work in the unique test stand which is used for long-term tests of turbine flowmeters. A 1D method was used to design this blower, then experimental and numerical studies were conducted in order to verify the 1D method. A comparison of the blower pressure increase obtained from the experiment and the computations is presented. Velocity and pressure distributions from the numerical simulations in selected sections a

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29

Hiradate, Kiyotaka, Toshio Kanno, Hideo Nishida, Yasushi Shinkawa, and Satoshi Joukou. "Improvement in Efficiency and Operating Range of Centrifugal Blower Stage for Sewage Aeration Blower." International Journal of Fluid Machinery and Systems 3, no. 4 (2010): 379–85. http://dx.doi.org/10.5293/ijfms.2010.3.4.379.

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30

Guan, Xudong, Jin Zhou, Chaowu Jin, Haitong Wu, and Yingzhe Lin. "Adaptive surge detection of magnetic suspension centrifugal blower based on rotor radial displacement signal and SOGI-FLL with prefilter." Measurement Science and Technology 33, no. 6 (2022): 065304. http://dx.doi.org/10.1088/1361-6501/ac5a9a.

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Abstract For the surge detection problem of high-speed magnetic suspension centrifugal blower, a second order generalized integral-frequency locked loop with prefilter (SOGI-FLL-WPF) is used for surge detection. This method is utilized to normalize the amplitude and frequency of the surge signal by using the rotor radial displacement signal in the magnetic suspension blower. So that the response speed of detecting surge signal is not affected by the frequency and amplitude, and the frequency of the blower surge vibration signal is tracked adaptively. As a result, the fast response ability of t

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31

Suwandi, Dedi, Tito Endramawan, Adi Suheryadi, Alfarisi Alfarisi, and Felix Dionisius. "UJI PEFORMA RANCANG BANGUN PORTABLE VACUUM GRAIN CONVEYOR TIPE CENTRIFUGAL FAN." JTT (Jurnal Teknologi Terapan) 8, no. 2 (2022): 183. http://dx.doi.org/10.31884/jtt.v8i2.465.

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Portable vacuum grain conveyor (PVGC) work as transporting grain materials such as grain, wheat, sorghum, corn and its kind using air media. The advantages of this machine are that it can move material quickly, the material does not fall in the transportation process, it can move from the bottom to the top or vice versa, it does not require a feed hopper, and the machine can move places. How the PVGC machine works by utilizing the suction and thrust of a vacuum blower. The seed material is sucked in by the input hose and then into the cyclone to separate the air and seed material. Air from the

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32

Ohta, Y., E. Outa, and K. Tajima. "Evaluation and Prediction of Blade-Passing Frequency Noise Generated by a Centrifugal Blower." Journal of Turbomachinery 118, no. 3 (1996): 597–605. http://dx.doi.org/10.1115/1.2836707.

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The blade-passing frequency noise, abbreviated to BPF noise, of a low-specific-speed centrifugal blower is analyzed by separating the frequency response of the transmission passage and the intensity of the noise source. Frequency response has previously been evaluated by the authors using a one-dimensional linear wave model, and the results have agreed well with the experimental response in a practical range of the blower speed. In the present study, the intensity of the noise source is estimated by introducing the quasi-steady model of the blade wake impingement on the scroll surface. The eff

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33

Klyagin, G. S., А. B. Biryukov, and V. A. Sidorov. "History of blast furnace blowers." Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information 79, no. 5 (2023): 415–30. http://dx.doi.org/10.32339/0135-5910-2023-5-415-430.

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The development of blowers is inextricably linked with the stages of the history of technology and blast furnace production. The amount of blast is one of the main parameters of cast iron production, determining the size and performance of the blast furnace. Consideration of the issues of changing the design and drive of blowers starts from the natural draft and wedged leather bellows. The use of a horse-drawn drive or a water co-scaffold made it possible to increase the amount of air supplied to the furnace. The important event in the development of blowers was the advent of a steam engine, w

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34

AOKI, Katsumi, and Yasuki NAKAYAMA. "Effect of Tongue Shape for Characteristics of Centrifugal Blower." Journal of the Visualization Society of Japan 17, Supplement2 (1997): 125–28. http://dx.doi.org/10.3154/jvs.17.supplement2_125.

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35

HAN Bang-cheng, 韩邦成, 王凯 WANG Kai, 郑世强 ZHENG Shi-qiang, and 张寅 ZHANG Yin. "Surge detection of magnetically suspended high-speed centrifugal blower." Optics and Precision Engineering 25, no. 4 (2017): 910–18. http://dx.doi.org/10.3788/ope.20172504.0910.

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36

Jeong, Tae-Sik, Xin Cheng Tu, Sung-Jun Kim, Hwan-Young Jang, Jin-Kwang Kim, and Hyoung-Bum Kim. "Quantitative Visualization of Inlet Flow of the Centrifugal Blower." Journal of the Korean Society of Visualization 11, no. 2 (2013): 27–33. http://dx.doi.org/10.5407/jksv.2013.11.2.029.

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37

Tu, Xin Cheng, Sung-Jun Kim, Seung Ha Park, and Hyoung-Bum Kim. "Quantitative Visualization of Outlet Flow of the Centrifugal Blower." Journal of the Korean Society of Visualization 12, no. 1 (2014): 25–29. http://dx.doi.org/10.5407/jksv.2014.12.1.025.

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38

HIKICHI, Masakazu, Yutaka OHTA, and Eisuke OUTA. "Active Control of Noise Source in a Centrifugal Blower." Proceedings of the JSME annual meeting 2000.4 (2000): 51–52. http://dx.doi.org/10.1299/jsmemecjo.2000.4.0_51.

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39

NAKAYAMA, Yasuki, Toru YAMAMOTO, Katsumi AOKI, and Hiroaki OHTA. "Measurement of relative velocity distribution in centrifugal blower impeller." Transactions of the Japan Society of Mechanical Engineers Series B 51, no. 461 (1985): 325–32. http://dx.doi.org/10.1299/kikaib.51.325.

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40

Almas, Majid. "Numerical Modeling of Turbulent Flow Inside the Centrifugal Blower." Journal of Advances in Applied & Computational Mathematics 3, no. 1 (2016): 54–57. http://dx.doi.org/10.15377/2409-5761.2016.03.01.8.

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41

NISHIZAWA, Kohei, Toru SHIGEMITSU, and Junichiro FUKUTOMI. "412 The Flow Conditions in a Centrifugal Blower Casing." Proceedings of Conference of Chugoku-Shikoku Branch 2007.45 (2007): 137–38. http://dx.doi.org/10.1299/jsmecs.2007.45.137.

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42

FUKUTOMI, Junichiro, Hironori HORIGUCHI, and Yuichi NAKATANI. "K-1104 Pressure Recovery in a Centrifugal Blower Casing." Proceedings of the JSME annual meeting II.01.1 (2001): 29–30. http://dx.doi.org/10.1299/jsmemecjo.ii.01.1.0_29.

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43

Srinath, Y. "Modeling & Analysis of Centrifugal Blower using Composite Material." IOSR Journal of Mechanical and Civil Engineering 9, no. 6 (2013): 17–25. http://dx.doi.org/10.9790/1684-0961725.

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44

Kulkarni, Prof (Dr) M. L., Shubham Goyal, Dhaivat Acharya, Deep Khant, and SK Azharuddin. "Design of a Centrifugal Blower Adopting Reverse Engineering Approach." IOSR Journal of Mechanical and Civil Engineering 11, no. 2 (2014): 28–33. http://dx.doi.org/10.9790/1684-11262833.

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45

NAKAYAMA, Yasuki, Toru YAMAMOTO, Katsumi AOKI, and Hiroaki OHTA. "Measurement of Relative Velocity Distribution in Centrifugal Blower Impeller." Bulletin of JSME 28, no. 243 (1985): 1978–85. http://dx.doi.org/10.1299/jsme1958.28.1978.

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46

Tsugita, D., C. K. P. Kowshik, and Y. Ohta. "Visualization of rotating vortex in a centrifugal blower impeller." Journal of Visualization 15, no. 3 (2012): 207–14. http://dx.doi.org/10.1007/s12650-012-0124-3.

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47

Johnson, A. E., and P. E. Hancock. "Some aspects of centrifugal fan characteristics in blower windtunnels." Aeronautical Journal 101, no. 1010 (1997): 481–85. http://dx.doi.org/10.1017/s0001924000065866.

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AbstractMeasurements have been made in the exit flows of the fan, diffuser, settling chamber and contraction of a low speed blower windtunnel driven by a centrifugal fan. A velocity deficit and streamwise vortex were observed at the diffuser exit when the fan was operating at less than about 0·9 of maximum efficiency but not when operating above. Unacceptably large unsteadiness (-0·7% rms) occurred at low speeds when the fan speed was increased from rest, but not when the fan speed was decreased from full speed. This unsteadiness was at the rotor frequency, and appears to have been caused by l

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48

Hiradate, Kiyotaka, Toshio Kannno, Hideo Nishida, Yasushi Shinkawa, and Satoshi jyoukou. "1210 Improvement in Efficiency and Operating Range of Centrifugal Blower Stage for Sewage Aeration Blower." Proceedings of the Fluids engineering conference 2010 (2010): 345–46. http://dx.doi.org/10.1299/jsmefed.2010.345.

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49

Zulfikar and Dean Corio. "Modifikasi Sudu-sudu Blower Sentrifugal yang Diaplikasikan pada Turbin Pico Hydro." Electrician : Jurnal Rekayasa dan Teknologi Elektro 17, no. 1 (2023): 26–30. http://dx.doi.org/10.23960/elc.v17n1.2409.

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The water turbine must be specially designed according to the calculation of its energy potential, proportional to the height of the falling water and the discharge. This research is conducted to study the solution fluid engine that functions as a pico hydro water turbine, namely a centrifugal blower with a simple construction, operating at low head, small discharge, easy installation and operation and low price. The blower used in this test is a blower that is already on the market with an impeller diameter of 15 cm, inlet size of 2 inches. The test was carried out at a constant head (falling

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50

Chen, Y., Z. Wang, H. Yang, W. Zhang, and Y. Wei. "Spatiotemporal Characteristics and Pressure Fluctuations of Internal Flow in a High-Speed Centrifugal Blower for Vacuum Cleaner at Low Flow-Rate Conditions." Journal of Applied Fluid Mechanics 16, no. 2 (2023): 375–88. http://dx.doi.org/10.47176/jafm.16.02.1245.

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Abstract:

The steady and unsteady characteristics of the internal flow in a high-speed centrifugal blower are studied by computational fluid dynamics (CFD) approach at low flow rates. It is demonstrated that as the flow rate decreases, the separation of flow in the blade passage becomes serious, and separated vortexes always occur on the suction surface of the blade which gradually expand and block the passage. The stall cells move downstream and generate vortices at the exit of the passage, resulting serious loss to the performance of the blower. Q-criteria is used to analyze the flow field and explore

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