管式减涡器入口局部压降和流阻特性

赵义祯; 魏嵩; 毛军逵

doi:10.13224/j.cnki.jasp.2021.01.006

管式减涡器入口局部压降和流阻特性

doi: 10.13224/j.cnki.jasp.2021.01.006

基金项目: 国家科技重大专项(1 2017-Ⅲ-0011-0037)

计量
- 文章访问数: 437
- HTML浏览量: 134
- PDF量: 250
- 被引次数: 0
出版历程
- 收稿日期: 2020-04-23
- 刊出日期: 2021-01-28

Local pressure drop and flow resistance characteristic at entrance of tubed vortex reducer

1.
Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China
2.
College of Energy and Power Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

摘要

摘要: 使用CFD仿真分析的方法,研究了带有导流管式减涡器的盘腔内空气流动和损失特性,重点阐明了导流管的减阻机理,特别是不同结构下管口处的流动与局部损失特性,并提出了一个数学模型来预测导流管盘腔内的压力。研究表明:管口处的流动及损失特性与管口之前的流动状态密切相关,且管口处发生的静压损失不容忽视,约占具整个盘腔损失的11%;合适的导流管长度可以有效的改善管口处的损失,在当前研究工况下具有最佳导流管长度的结构可以降低约25%的管入口处局部压降,约10%的整体静压降;建立了可以精确计算盘腔内压力分布的数学模型,模型计算结果与CFD结果相比平均误差约为53%。
- 管式减涡器 /
- 管口局部压降 /
- 流阻特性 /
- CFD仿真 /
- 理论建模
Abstract: The flow structure and flow loss characteristic in a rotating cavity with tubed vortex reducer were studied numerically. The study focused on the mechanism of the tubed vortex reducer, especially the local loss characteristic at the tube entrance under different geometric parameters of the tube. Based on these studies, a mathematical model for predicting the pressure drop in a tubed cavity was established. It was found that the local loss characteristics at the tube entrance were related to the flow state before the entrance, and the incident angle can describe this flow state well. The static pressure loss at the tube entrance cannot be ignored, accounting for about 11% of the total static pressure drop in the rotating cavity. Furthermore, the tube with a moderate-length can restrict the rotation of the air and reduce the pressure drop in the rotating cavity more effectively. Under the research conditions, the tubed vortex reducer with the optimal tube length can reduce the local pressure drop at the tube entrance by about 25% and the overall static pressure drop in the cavity by about 10%. This also showed that, the mathematical model can provide accurate results of the static pressure distribution in the tubed vortex reducer. The average error was about 53% between the CFD results and the mathematical model results.
- tubed vortex reducer /
- local pressure drop at the tube entrance /
- ,flow resistance characteristic /
- mathematical model /

HTML

参考文献(25)

[1]	倪萌,朱惠人,仇云,等.航空发动机涡轮叶片冷却技术综述［J］.燃气轮机技术,2005,1(4):25-34. NI Meng,ZHU Huiren,QIU Yun,et al.Review of aero turbine blade cooling technologies［J］.Gas Turbine Technology,2005,1(4):25-34.(in Chinese)
[2]	单文娟.发动机内/外部引气结构流动特性研究［D］.南京:南京航空航天大学,2014. SHAN Wenjuan.Research on flow characteristics of the typical internal and external bleed air structures in secondary air system［D］.Nanjing:Nanjing University of Aeronautics and Astronautics,2014.(in Chinese)
[3]	FARTHINGP R,CHEW J W,OWEN J M.The use of deswirl nozzles to reduce the pressure drop in a rotating cavity with a radial inflow［J］.Journal of Turbomachinery,1991,113(1):106-114.
[4]	FARTHINGP R,OWEN J M.De-swirled radial inflow in a rotating cavity［J］.International Journal of Heat and Fluid Flow,1991,12(1):63-70.
[5]	CHEWJ W,FARTHING P R,OWEN J M.The use of fins to reduce the pressure drop in a rotating cavity with a radial inflow［J］.Journal of Turbomachinery,1989,111(3):349-356.
[6]	DU Xiaoqing,ZHU huiren,ZHANG Zongwei.Numerical study on varied vortex reducer configurations for the flow path optimization in compressor cavities［R］.ASME Paper 2011-GT-45975,2011.
[7]	王远东,金峰,王志雄.导流板式减涡器对共转盘腔流动特性影响的实验研究［J］.重庆理工大学学报,2016,30(12):55-62. WANG Yuandong,JIN Feng,WANG Zhixiong.Experimental research on the gas flow characteristics of the co-rotational disc cavity with bafflers［J］.Journal of Chongqing University of Technology,2016,30(12):55-62.(in Chinese)
[8]	PFITZNER M,WASCHKA W.Development of an aero engine secondary air system employing vortex reducers［R］.Harogate,UK:the 22nd ICAS Congress,2000.
[9]	田冉冉,毛军逵,范俊,等.反旋进气混合式减涡结构流动特性数值计算［J］.航空动力学报,2019,34(8):1677-1687. TIAN Ranran,MAO Junkui,FAN Jun,et al.Numerical calculation of flow characteristics of hybrid vortex reduce structure combing de-swirl inlet［J］.Journal of Aerospace Power,2019,34(8):1677-1687.(in Chinese)
[10]	GNTHER A,UFFRECHT W,KAISER E,et al.Experimental analysis of varied vortex reducer configurations for the internal air system of jet engine gas turbines［R］.ASME Paper 2008-GT-50738,2008.
[11]	PEITSCH D,STEIN M,HEIN S,et al.Numerical investigation of vortex reducer flows in the high pressure compressor of modern aeroengines［R］.ASME Paper 2002-GT-30674,2002.
[12]	CHEN Xiao,FENG Ye,WU Lijun.The experimental investigations of centripetal air bleed with tubed vortex reducer for secondary air system in gas turbine［R］.ASME Paper GT2014-26959,2014.
[13]	LIANG Zhirong,LUO Xiang,FENG Ye,et al.Experimental investigation of pressure losses in a co-rotating cavity with radial inflow employing tubed vortex reducers with varied nozzles［J］.Experimental Thermal and Fluid Science,2015,66:304-315.
[14]	LUO Xiang,FENG An,QUAN Yongkai,et al.Experimental analysis of varied vortex reducers in reducing the pressure drop in a rotating cavity with radial inflow［J］.Experimental Thermal and Fluid Science,2016,77:159-166.
[15]	SIBILLI T,CHO G,KHOLI F,et al.Numerical analysis of industrial gas turbine secondary air systems employing vortex reducers［R］.ASME Paper 2018-GT-76313,2018.
[16]	WEI Song,MAO Junkui,YAN Jiaxi,et al.Experimental study on a hybrid vortex reducer system in reducing the pressure drop in a rotating cavity with radial inflow［J］.Experimental Thermal and Fluid Science,2020,110:109942.1-109942.12.
[17]	吴丽军,陈潇,邓双国,等.减涡器流阻特性计算分析［J］.燃气轮机技术,2014,27(3):37-43. WU Lijun,CHEN Xiao,DENG Shuangguo,et al.Calculation and analysis of flow resistance characteristics［J］.Gas Turbine Technology,2014,27(3):37-43.(in Chinese)
[18]	赵秋月,娄德仓,郭文,等.旋转盘腔去旋系统数值模拟［J］.燃气涡轮试验与研究,2014,27(5):43-48. ZHAO Qiuyue,LOU Decang,GUO Wen,et al.Numerical simulation of rotating disk cavity derotation system［J］.Turbine Experiment and Research,2014,27(5):43-48.(in Chinese)
[19]	蔡凡超,罗翔,孙平平,等.管式减涡器压力损失特性数值研究［J］.燃气涡轮试验与研究,2019,32(2):49-55. CAI Fanchao,LUO Xiang,SUN Pingping,et al.Numerical study of pressure drop in tubular vortex reducer［J］.Turbine Experiment and Research,2019,32(2):49-55.(in Chinese)
[20]	WEI Song,YAN Jiaxi,MAO Junkui,et al.A mathematical model for predicting the pressure drop in a rotating cavity with a tubed vortex reducer［J］.Engineering Applications of Computational Fluid Mechanics,2019,13(1):664-682.
[21]	WITTIG S,KIM S,JAKOBY R,et al.Experimental and numerical study of orifice discharge coefficients in high-speed rotating disks［J］.Journal of Turbomachinery,1996,118(2):400-407.
[22]	DITTMANN M,GEIS T,SCHRAMM V,et al.Discharge coefficients of a pre-swirl system in secondary air systems［J］.Journal of Turbomachinery,2002,124(1):119-124.
[23]	IDRIS A,PULLEN K R,READ R.The influence of incidence angle on the discharge coefficient for rotating radial orifices［R］.ASME Paper 2004-GT-53237,2004.
[24]	FIROUZIAN M,OWEN J M,PINCOMBE J R,et al.Flow and heat transfer in a rotating cylindrical cavity with a radial inflow of fluid:Part 2 velocity,pressure and heat transfer measurements［J］.International Journal of Heat and Fluid Flow,1986,7(1):21-27.
[25]	MOODY L F.Friction factors for pipe flow［J］.Transactions of the ASME,1944,66(8):671-684.