Volume 32 Issue 6
Jun.  2017
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Anti-surge model and control strategy of fan in wind tunnel[J]. Journal of Aerospace Power, 2017, 32(6): 1434-1440. doi: 10.13224/j.cnki.jasp.2017.06.021
Citation: Anti-surge model and control strategy of fan in wind tunnel[J]. Journal of Aerospace Power, 2017, 32(6): 1434-1440. doi: 10.13224/j.cnki.jasp.2017.06.021

Anti-surge model and control strategy of fan in wind tunnel

doi: 10.13224/j.cnki.jasp.2017.06.021
  • Received Date: 2016-11-17
  • Publish Date: 2017-06-28
  • Based on the application of multi-stage axial fan in continuous high speed wind tunnel, the flow rate condition of surge and flow rate characteristic of changeful wind tunnel test state was analyzed, and an anti-surge model based on inlet flow rate and pressure ratio was established. The fan flow similarity condition and a flow rate calculating method were given, the generalized characteristics and work curves of wind tunnel fan were determined, and the anti-surge cluster curves were set based on rotating speed range and work characteristic of fan. Based on PLC (programmable logic controller) and WinCC automation system, a multi-level redundant anti-surge control strategy was proposed and validated in wind tunnel test. The results show that the anti-surge model has satisfactory effect to reflect the operation situation and safety margin of fan caused by changeful wind tunnel test condition exactly; standard deviation of flow rate and pressure ratio acquired is 0.002 and 0.001, anti-surge control repeatability accuracy is 0.003, realizing real-time discrimination and automatic control of surge come true, and effectively preventing the surge.

     

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