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      |本期目錄/Table of Contents|

      [1]徐亮,熊堰宏,席雷,等.傾斜螺紋孔射流傳熱特性的數值研究[J].西安交通大學學報,2019,53(09):120-128+182.[doi:10.7652/xjtuxb201909016]
       XU Liang,XIONG Yanhong,XI Lei,et al.Numerical Study on the Heat Transfer Characteristics of Inclined Thread-Hole Jet[J].Journal of Xi'an Jiaotong University,2019,53(09):120-128+182.[doi:10.7652/xjtuxb201909016]
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      傾斜螺紋孔射流傳熱特性的數值研究(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:
      120-128+182
      欄目:
      出版日期:
      2019-09-10

      文章信息/Info

      Title:
      Numerical Study on the Heat Transfer Characteristics of Inclined Thread-Hole Jet
      作者:
      徐亮12 熊堰宏1 席雷1 高建民1 李云龍1
      1.西安交通大學機械制造系統工程國家重點實驗室, 710049, 西安; 2.廣東西安交通大學研究院, 528000, 廣東佛山
      Author(s):
      XU Liang12 XIONG Yanhong1 XI Lei1 GAO Jianmin1 LI Yunlong1
      1.State Key Laboratory of Mechanical Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049, China; 2.Guangdong Xi'an Jiaotong University Academy, Foshan, Guangdong 528000, China
      關鍵詞:
      旋轉沖擊射流 傾斜角 傳熱特性 數值模擬
      Keywords:
      swirling impinging jet inclination angle heat transfer numerical simulation
      分類號:
      TK124
      DOI:
      10.7652/xjtuxb201909016
      摘要:
      為了提高傳統圓孔沖擊射流的冷卻效果,提出采用螺紋孔來代替圓孔,并采用數值模擬方法研究了傾斜狀態下螺紋孔旋轉沖擊射流的復雜流動狀態和傳熱性能,研究的影響因素包括射流傾斜角(α=45°~90°)、沖擊距離(H/d=2,4,6)、雷諾數(Re=6 000~24 000)。研究結果表明:傾斜角和沖擊距離對射流空間內旋渦的大小、形狀和位置有較大的影響; 在傾斜狀態下,旋轉射流沖擊冷卻效果要優于圓孔射流,但當α=45°時,旋轉射流沖擊靶面的對流傳熱效果會明顯惡化; 當Re=6 000,α=60°,H/d分別為2、4和6時,旋轉射流靶面中心努塞爾數Nu比圓孔射流靶面中心Nu分別高139.9%、107.2%、27.3%; 當沖擊距離相同時,旋轉射流靶面平均努塞爾數高于圓孔射流。與圓孔射流相比,Re≤18 000下提高射流Re,旋轉射流能顯著增強靶面傳熱能力。
      Abstract:
      To improve the cooling effect of traditional circular impinging jet, screw hole is used to replace the round hole.The complex flow and heat transfer performance of the swirling impinging jet with an inclined screw hole are studied by numerical simulation.The influencing factors include jet inclination angle(α=45° - 90°), impingement distance(H/d=2,4,6), and Reynolds number(Re=6 000 - 24 000).The results show that the inclination angle and impact distance have great influences on the size, shape and position of vortices in the jet space.Under inclined screw-hole conditions, the impingement cooling effect of rotating jet is better than that of circular-hole jet, but when the inclination angle is equal to 45°, the convective heat transfer effect of the swirling jet impinging on target surface may deteriorate obviously.When Re=6 000, α=60° and the impingement distances H/d are 2, 4 and 6, the Nusselt number at the center of swirling jet target surface is 139.9%, 107.2% and 27.3% higher than those at the center of circular-hole jet target surface, respectively.When the impingement distance is the same, the average Nusselt number on the target surface of the swirling jet is higher than that of the circular-hole jet.Compared with the circular-hole jet, the rotating jet can significantly enhance the heat transfer capability of target surface by increasing Re in the range of Re≤18 000.

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      備注/Memo

      備注/Memo:
      收稿日期: 2019-01-05。作者簡介: 徐亮(1980—),男,副教授;痦椖: 國家自然科學基金資助項目(51876157); 廣東省自然科學基金資助項目(2018A030313183); 中央高;究蒲袠I務費專項資金資助項目(xjj2018044)。
      更新日期/Last Update: 2019-09-04
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