Numerical Study for Centrifugal Fan Based on Parametric Method

Zhang, Lei; Wang, Song Ling; Wu, Dian Fa; Zhang, Qian

doi:10.4028/www.scientific.net/amm.55-57.892

Cited by 1 publication

(1 citation statement)

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“…It has been proven that using the numerical simulation method to study the internal flow field of a centrifugal fan is feasible, and the unsteady Reynolds-averaged Navier–Stokes equations (URANS) are widely used by scholars studying the passage-to-passage flow fields of centrifugal fans. 1–3 Chen et al. 4 simulated the internal flow of a centrifugal fan under the same conditions as an experiment, and the results showed that the numerical results were consistent with the experiment results.…”

Section: Introductionmentioning

confidence: 77%

Simulation of air jets for controlling stall in a centrifugal fan

Zhang

Wang

Yuan

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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The main goal of the present work is to analyze the three-dimensional unsteady flow field of a centrifugal fan by solving Navier–Stokes equations, coupled with the throttle condition. The results show that rotating stall occurs in the original fan when the flow rate is 4.30 m3/s, and the stall inception first appears at three impeller passages near the volute tongue and front disc. An active control method is proposed to inhibit the stall inception, which involves blowing air at the inlets of the three impeller passages. This blowing control method cannot inhibit the stall inception when the blowing speed is lower than 50 m/s. The stability margin of the centrifugal fan is extended when the blowing speed is increased from 50 to 110 m/s, while no further effect is obvious with a further increase in the blowing speed. At a blowing speed of 110 m/s, rotating stall occurs again when the fan flow reaches 3.46 m3/s. After the application of the nozzle blowing, the safety margin of the centrifugal fan is extended by 13%, and an obvious stability enhancement effect is achieved. From an engineering standpoint, this new active control method for rotating stall offers a valuable means to ensure the safe operation of a centrifugal fan.

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Section: Introductionmentioning

confidence: 77%