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      |本期目錄/Table of Contents|

      [1]高慶,屈杰,馬汀山,等.軸向輪緣密封導流段幾何結構對渦輪級氣動冷卻特性影響的數值研究[J].西安交通大學學報,2019,53(09):26-33.[doi:10.7652/xjtuxb201909004]
       GAO Qing,QU Jie,MA Tingshan,et al.Numerical Investigation on the Effects of Rim Seal Diversion Configurations on Aerodynamic and Film Cooling Performances of Turbine Stage[J].Journal of Xi'an Jiaotong University,2019,53(09):26-33.[doi:10.7652/xjtuxb201909004]
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      軸向輪緣密封導流段幾何結構對渦輪級氣動冷卻特性影響的數值研究(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:
      26-33
      欄目:
      出版日期:
      2019-09-10

      文章信息/Info

      Title:
      Numerical Investigation on the Effects of Rim Seal Diversion Configurations on Aerodynamic and Film Cooling Performances of Turbine Stage
      作者:
      高慶12 屈杰12 馬汀山12 居文平12 李軍3 惠濤4
      1.西安熱工研究院有限公司, 710054, 西安; 2.西熱節能技術有限公司, 710054, 西安; 3.西安交通大學葉輪機械研究所, 710049, 西安; 4.中國建筑西北設計研究院有限公司, 710018, 西安
      Author(s):
      GAO Qing12 QU Jie12 MA Tingshan12 JU Wenping12 LI Jun3 HUI Tao4
      1.Xi'an Thermal Power Research Institute Co.Ltd., Xi'an 710054, China; 2.Xi'an TPRI Energy Conservation Technology Co.Ltd., Xi'an 710054, China; 3.Institute of Turbomachinery, Xi'an Jiaotong University, Xi'an 710049, China; 4.Northwest Architecture Design and Research Institute Co.Ltd., Xi'an 710018, China
      關鍵詞:
      輪緣密封 氣動性能 冷卻特性 數值模擬
      Keywords:
      turbine stage rim seal aerodynamic performance film cooling performance numerical simulations
      分類號:
      TK472
      DOI:
      10.7652/xjtuxb201909004
      摘要:
      以軸向輪緣密封為研究對象,在傳統直縫密封間隙結構的基礎上,通過改變軸向外齒間隙區域的幾何型線,設計了雙曲線、橢圓及圓型密封導流段結構,數值求解了三維RANS方程組和SST湍流模型,并且系統深入研究了這4種不同導流段幾何結構下輪緣密封射流對渦輪級的氣動性能,以及對下游動葉端壁冷卻性能的影響規律。研究結果表明:所設計圓型、橢圓型以及雙曲型導流段結構均可提高渦輪級整體氣動性能; 圓型密封導流段結構具有最佳的氣動性能以及端壁氣膜冷卻效果。相比于直縫型導流段結構,采用圓型導流段結構在相同的冷氣流量下,渦輪級效率可提高約0.23%; 在動葉前緣輪緣密封射流所覆蓋的冷卻區域,采用圓型導流段結構時冷卻效率可提高約20%。
      Abstract:
      In this investigation, the effects of rim seal diversion configurations on the aerodynamic and film cooling performances of turbine stage were analyzed with axial rim seal as the research object.Firstly, hyperbola, ellipse and circle rim seal diversion configurations were designed based on the conventional axial rim seal configuration.Three-dimensional Reynolds-averaged Navier-Stokes(RANS)equations, coupled with a fully-developed shear stress transport(SST)turbulent model from Ansys-CFX, were utilized to evaluate the influence of rim seal diversion configurations on the interaction of the hub leakage flow with the mainstream in the turbine stage.The results show that all the three diversion configurations of hyperbola, ellipse and circle rim seals could improve the turbine efficiency compared with axial seal.The circle rim seal provides the best aerodynamic and film cooling performances of turbine stage.Compared with axial seal, the circle rim seal could improve the turbine efficiency by 0.23% at the same sealing flow rate, and it also improves the film cooling efficiency by 20% in the front of rotor hub platform.

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      備注/Memo

      備注/Memo:
      收稿日期: 2019-03-21。作者簡介: 高慶(1988—),男,博士,工程師; 李軍(通信作者),男,教授;痦椖: 國家自然科學基金資助項目(51776151)。
      更新日期/Last Update: 2019-09-04
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