光滑通道内格栅湍流特性实验

袁星; 黄维娜

doi:10.13224/j.cnki.jasp.2019.01.004

光滑通道内格栅湍流特性实验

doi: 10.13224/j.cnki.jasp.2019.01.004

袁星¹,
黄维娜²

1.
北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室，北京 100191；先进航空发动机协同创新中心，北京 100191
2.
北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室，北京 100191

计量
- 文章访问数: 874
- HTML浏览量: 3
- PDF量: 874
- 被引次数: 0
出版历程
- 收稿日期: 2017-05-21
- 刊出日期: 2019-01-28

Experiment of grid-generated turbulent ina smooth channel

摘要

摘要: 为了更好地模拟实际涡轮叶片内冷通道的流动换热，采用格栅对光滑通道内湍流度进行控制。并通过实验的方法对不同格栅尺寸激发的湍流度进行测量。实验中，在边长为80mm×80mm的方形通道中，放置了3种不同尺寸的格栅，利用热线风速仪，得到了通道雷诺数为5000~30000范围内的格栅后下游湍流特性。研究发现：流体通过该格栅后，气流在流经格栅后较短距离内就获得了4.5%的湍流度，同时湍流度沿程呈现衰减趋势，雷诺数对湍流度的影响较小。湍流积分时间尺度与雷诺数呈负相关的关系。
- 光滑通道 /
- 热线 /
- 格栅湍流 /
- 湍流度 /
- 湍流特性
Abstract: In order to simulate the flow and heat transfer in a turbine coolant channel, grids were used to control the turbulent intensity in a smooth channel. Different sizes of grids were used to generate different turbulence intensity. In the experiment, three different kinds of grids were put in a square smooth channel with the cross-section of 80mm×80mm. Hot-wire was used to measure the turbulence with Reynolds ranging from 5000 to 30000. The results showed that after flowing through the grids, the turbulent intensity can be up to 4.5%, and decreased along the stream-wise directions. The effect of Reynolds numbers on turbulent intensity is not obvious in the current work. And the turbulent integral time scale has a positive relationship with Reynolds numbers.
- smooth channel /
- hotwire /
- grid-generated turbulent /
- turbulent intensity /
- turbulence characteristics

HTML

参考文献(26)

[1]	陈懋章.航空发动机技术的发展［J］.科学中国人,2015(304):10-19.CHEN Maozhang.Development of aero-engine.［J］.Scientific Chinese,2015(304):10-19.(in Chinese)
[2]	HAN J C,DUTTA S,EKKAD S V.Gas turbine heat transfer and cooling technology［M］.Boca Raton,FL,US:CRC Press,2012.
[3]	LIOU T M,CHANG S W,YANG C C,et al.Thermal performance of a radially rotating twin-pass smooth-walled parallelogram channel［J］.Journal of Turbomachinery,2014,136(12):121007.1-121007.7.
[4]	QIU Lu,DENG Hongwu,SUN Jining,et al.Pressure drop and heat transfer in rotating smooth square U-duct under high rotation numbers［J］.International Journal of Heat and Mass Transfer,2013,66(6):543-552.
[5]	COLETTI F,MAURER T,ARTS T,et al.Flow field investigation in rotating rib-roughened channel by means of particle image velocimetry［J］.Experiments in Fluids,2012,52(4):1043-1061.
[6]	COLETTI F,CRESCI I,ARTS T.Time-resolved PIV measurements of turbulent flow in rotating rib-roughened channel with coriolis and buoyancy forces［R］.ASME Paper GT2012-69406,2012.
[7]	COLETTI F,JACONO D L,CRESCI I,et al.Turbulent flow in rib-roughened channel under the effect of Coriolis and rotational buoyancy forces［J］.Physics of Fluids,2014,26(4):533-557.
[8]	COLETTI F,ARTS T.Aerodynamic investigation of a rotating ribroughened channel by means of time-resolved PIV［J］.Journal of Power and Energy,2011,225(7):975-984.
[9]	ELFERT M,SCHROLL M,FRSTER W.PIV-measurement of secondary flow in a rotating two-pass cooling system with an improved sequencer technique［R］.ASME Paper GT2010-23510,2010.
[10]	ELFERT M,VOGES M,KLINNER J.Detailed flow investigation using PIV in a rotating square-sectioned two-pass cooling system with ribbed walls［R］.ASME Paper GT2008-51183,2008.
[11]	YOU Ruquan,LI Haiwang,TAO Zhi,et al.PIV measurements of turbulent flow in a smooth channel with heated boundary under rotation condition［J］.Applied Thermal Engineering,2017,123(8):1021-1033.
[12]	魏宽,陶智,邓宏武,等.旋转状态下方形通道内部流场特性热线实验［J］.航空动力学报,2016,31(11):2635-2640.WEI Kuan,TAO Zhi,DENG Hongwu,et al.Hot wire test on the flow fields in a rotating square channel［J］.Journal of Aerospace Power,2016,31(11):2635-2640.(in Chinese)
[13]	由儒全,李海旺,魏宽,等.旋转光滑直通道湍流流动二维热线实验［J］.航空动力学报,2017,32(7):1577-1584.YOU Ruquan,LI Haiwang,WEI Kuan,et al.Experiment of turbulent flow in rotating smooth channel using two-dimensional hotwire［J］.Journal of Aerospace Power,2017,32(7):1577-1584..(in Chinese)
[14]	YOU Ruquan,LI Haiwang,TAO Zhi,et al.Measurement of the mean flow field in a smooth rotating channel with Coriolis and buoyancy effects［R］.ASME Paper GT2017-63123,2017.
[15]	COMTEBLLOT G,CORRSIN S.The use of a contraction to improve the isotropy of grid-generated turbulence［J］.Journal of Fluid Mechanics,1966,25(4):657-682.
[16]	OZONO S,NISHI A,MIYAGI H.Turbulence generated by a wind tunnel of multi-fan type in uniformly active and quasi-grid modes［J］.Journal of Wind Engineering and Industrial Aerodynamics,2006,94(4):225-240.
[17]	MURZYN F,BLORGEY M.Experimental investigation of the grid-generated turbulence features in a free surface flow［J］.Experimental Thermal and Fluid Science,2005,29(8):925-935.
[18]	AND E M L,LIVESEY J L.Flow through screens［J］.Annual Review of Fluid Mechanics,1978,10(1):247-266.
[19]	FREDSE J,SUMER B M,KOZAKIEWICZ A,et al.Effect of externally generated turbulence on wave boundary layer［J］.Coastal Engineering,2003,49(3):155-183.
[20]	NISHI A,KIKUGAWA H,MATSUDA Y,et al.Active control of turbulence for an atmospheric boundary layer model in a wind tunnel［J］.Journal of Wind Engineering and Industrial Aerodynamics,1999,83(1):409-419.
[21]	NISHI A,KIKUGAWA H,MATSUDA Y,et al.Turbulence control in multiple-fan wind tunnels［J］.Journal of Wind Engineering and Industrial Aerodynamics,1997,67-68(4):861-872.
[22]	SPEZIALE C G,BERNARD P S.The energy decay in self-preserving isotropic turbulence revisited［J］.Journal of Fluid Mechanics,1992,241(1):645-667.
[23]	MOHAMED M S,LARUE J C.The decay power law in grid-generated turbulence［J］.Journal of Fluid Mechanics,1990,219(1):195-214.
[24]	TSUJI H.A contribution to the energy decay law of isotropic turbulence in the initial period［J］.Japan Aerospace Exploration Agency Report,1959,25(5):87-108.
[25]	BATCHELOR G K,TOWNSEND A A.Decay of isotropic turbulence in the initial period［J］.Proceedings of the Royal Society A,1948,193(1035):539-558.
[26]	ROMANO G P.Analysis of two-point velocity measurements in near-wall flows［J］.Experiments in Fluids,1995,20(2):68-83.