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      |本期目錄/Table of Contents|

      [1]張英杰,韓戈,董旭,等.高負荷離心壓氣機擴壓器葉片前緣開槽參數化研究[J].西安交通大學學報,2019,53(09):34-41.[doi:10.7652/xjtuxb201909005]
       ZHANG Yingjie,HAN Ge,DONG Xu,et al.Parametric Investigation on the Effects of Slotted Diffuser on a Highly Loaded Centrifugal Compressor[J].Journal of Xi'an Jiaotong University,2019,53(09):34-41.[doi:10.7652/xjtuxb201909005]
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      高負荷離心壓氣機擴壓器葉片前緣開槽參數化研究(PDF)

      《西安交通大學學報》[ISSN:0253-987X/CN:61-1069/T]

      卷:
      53
      期數:
      2019年第09期
      頁碼:
      34-41
      欄目:
      出版日期:
      2019-09-10

      文章信息/Info

      Title:
      Parametric Investigation on the Effects of Slotted Diffuser on a Highly Loaded Centrifugal Compressor
      作者:
      張英杰12 韓戈1 董旭12 趙勝豐12 張燕峰12 盧新根12
      1.中國科學院工程熱物理研究所, 100190, 北京; 2.中國科學院大學, 100049, 北京
      Author(s):
      ZHANG Yingjie12 HAN Ge1 DONG Xu12 ZHAO Shengfeng12 ZHANG Yanfeng12 LU Xingen12
      1.Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China
      關鍵詞:
      離心壓氣機 擴壓器開槽 數值模擬 失速裕度
      Keywords:
      centrifugal compressor slotted diffuser numerical simulation stall margin
      分類號:
      V231.3
      DOI:
      10.7652/xjtuxb201909005
      摘要:
      針對離心壓氣機在近失速工況點運行時,擴壓器進口氣流角為正攻角,造成其吸力面發生流動分離,從而導致壓氣機發生失速甚至喘振等問題,為進一步擴大離心壓氣機的穩定工作范圍,需對擴壓器近失速工況點的流動分離進行抑制。以某高負荷離心壓氣機為研究對象,利用經過校核的數值模擬方法開展了擴壓器葉片前緣開槽的參數化研究,詳細探討了開槽長度、深度對離心壓氣機性能、穩定裕度的影響規律,歸納總結了離心壓氣機擴壓器的最佳開槽參數。研究結果表明:隨著開槽深度、長度的增加,失速裕度有所提高但壓氣機性能有所下降; 實際設計中開槽深度不應超過葉片高度的9%,最佳開槽長度不應超過葉片弦長的6%~12%; 當擴壓器開槽深度為葉片高度的3%、開槽長度為葉片弦長的6%~12%時,壓氣機性能最佳。擴壓器開槽可有效抑制其通道內的流動分離,并提高壓氣機的失速裕度。
      Abstract:
      When a centrifugal compressor operates near the stall point, the positive incidence angle at the diffuser inlet makes flow separation appear near the diffuser suction side, leading to compressor stall and surge.The leading edge structure of diffuser has an important effect on the compressor's performance and flow field.To extend stable operating range of centrifugal compressors, the flow separations within the diffuser passage near stall point need to be suppressed.In this research, numerical simulations were performed for a highly loaded centrifugal compressor to investigate the design method of slotted diffuser and discuss the influences of slot length and depth on the stage performance and stall margin.The results indicate that the compressor performance is deteriorated with the increase of slot length and depth, although the stall margin is expanded.In conclusion, the slot depth should not exceed 9% of the diffuser vane height, and the optimal slot length should not be more than 6%-12% of the diffuser chord length, which provides a guideline for slotted diffuser design.When the slot depth is 3% of the diffuser vane height and slot the length is in the range of 6%-12% of the diffuser chord length, the compressor performance is the best.Adopting slotted diffuser is an effective passive flow control strategy for suppressing flow separation in diffuser and expanding compressor stall margin.

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      備注/Memo

      備注/Memo:
      收稿日期: 2019-02-14。作者簡介: 張英杰(1994—),女,博士生; 盧新根(通信作者),男,研究員;痦椖: 國家自然科學基金資助項目(51606187)。
      更新日期/Last Update: 2019-09-04
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