Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

CAI Xu; LUO Xiang; ZHAO Xi; XU Guo-qiang; CAI Jun

doi:10.13224/j.cnki.jasp.2015.04.002

Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

doi: 10.13224/j.cnki.jasp.2015.04.002

1. National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. Department of Information Network, Dalian Airforce Communicaiton Non-Commissioned Office Academy, Dalian Liaoning 116600, China;
3. Guizhou Aero-Engine Research Institute, Aviation Industry Corporation of China, Guiyang 550081, China

详细信息

中图分类号: V231.92
计量
- 文章访问数: 1244
- HTML浏览量: 3
- PDF量: 893
- 被引次数: 0
出版历程
- 收稿日期: 2013-11-11
- 刊出日期: 2015-04-28

Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

1. National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. Department of Information Network, Dalian Airforce Communicaiton Non-Commissioned Office Academy, Dalian Liaoning 116600, China;
3. Guizhou Aero-Engine Research Institute, Aviation Industry Corporation of China, Guiyang 550081, China

摘要

摘要: Experiments were conducted on a typical rotor-stator system where air entered through an annular slot at low radius and flowed out of the cavity axially through a rim seal between the rotor and the stator. For the seal in this rotor-stator system, the stationary shroud overlapped the rotating one. Pressure distributions at the stator surface and flow resistance coefficients of the rotor-stator cavity with a maximum gap of 67mm were measured under different dimensionless mass flow rates from 1.32×10⁴ to 4.87×10⁴ with a large range of rotational Reynolds numbers from 0.418×10⁶ to 2.484×10⁶. The results show that pressure on the stator surface decreases with the increase of rotational Reynolds number when the dimensionless mass flow rate is below 1.3×10⁴; when the dimensionless mass flow rate is above 3.034×10⁴, the trend reverses. This is the so-called "pressure inversion effect". However, dimensionless pressure does not show the same changes when rotational dynamic pressure is chosen as the denominator. The resistance coefficient of the rotor-stator cavity is determined by the dimensionless mass flow rate and rotational Reynolds number; for practical application, the resistance coefficient can also be estimated by the turbulent flow parameter in the range of turbulent parameter from 0.1 to 1.6.
- cooling system /
- rotor-stator system /
- flow characteristics /
- pressure distribution /
- resistance coefficient
Abstract: Experiments were conducted on a typical rotor-stator system where air entered through an annular slot at low radius and flowed out of the cavity axially through a rim seal between the rotor and the stator. For the seal in this rotor-stator system, the stationary shroud overlapped the rotating one. Pressure distributions at the stator surface and flow resistance coefficients of the rotor-stator cavity with a maximum gap of 67mm were measured under different dimensionless mass flow rates from 1.32×10⁴ to 4.87×10⁴ with a large range of rotational Reynolds numbers from 0.418×10⁶ to 2.484×10⁶. The results show that pressure on the stator surface decreases with the increase of rotational Reynolds number when the dimensionless mass flow rate is below 1.3×10⁴; when the dimensionless mass flow rate is above 3.034×10⁴, the trend reverses. This is the so-called "pressure inversion effect". However, dimensionless pressure does not show the same changes when rotational dynamic pressure is chosen as the denominator. The resistance coefficient of the rotor-stator cavity is determined by the dimensionless mass flow rate and rotational Reynolds number; for practical application, the resistance coefficient can also be estimated by the turbulent flow parameter in the range of turbulent parameter from 0.1 to 1.6.
- cooling system /
- rotor-stator system /
- flow characteristics /
- pressure distribution /
- resistance coefficient

HTML

参考文献(18)

[1]	Bayley F J, Owen J M.Flow between a rotating and a stationary disc[J].Aeronautical Quarterly, 1969, 20:333-354.
[2]	Daily J W, Ernst W D, Asbedian V V.Enclosed rotating discs with superposed throughflow:mean steady and periodic unsteady characteristics of induced flow[R].Cambridge, US:Department of Civil Engineering, Massachusetts Institute of Technology, Hydrodynamics Laboratory Report No.64, 1964.
[3]	Dadkhah S.Ingestion and sealing performance of rim seals in rotor-stator wheelspaces[D].Brighton, UK:University of Sussex, 1989.
[4]	Phadke U P, Owen J M.Aerodynamic aspects of the sealing of gas-turbine rotor-stator system:Part 1 the behavior of simple shrouded rotating-disk systems in a quiescent environment[J].International Journal of Heat and Fluid Flow, 1988, 9(2):98-105.
[5]	Chew J W.A theoretical study of ingress for shrouded rotating disc systems with radial outflow[J].Journal of Turbomachinery, 1991, 113(1):91-97.
[6]	Bhavani S H, Khilnani V I, Tsai L C, et al.Effective sealing of a disc cavity using a double toothed rim seal[R].ASME Paper 92-GT-379, 1992.
[7]	Daniels W A, Johnson B W, Graber D J, et al.Rim seal experiments and analysis for turbine applications[J].Journal of Turbomachinery, 1992, 114(2):426-432.
[8]	Bohn D, Johann E, Kruger U.Experimental and numerical investigations of aerodynamic aspects of hot gas ingestion in rotor-stator systems with superposed cooling mass flow[R].ASME Paper 95-GT-143, 1995.
[9]	Jakoby R, Lindblad K, Devito L, et al.Numerical simulation of the unsteady flow field in an axial gas turbine rim seal configuration[R].ASME Paper GT2004-53829, 2004.
[10]	Poncet S, Chauve M P, Schiestel R.Batchelor versus Stewartson flow structures in a rotor-stator cavity with throughflow[J].Physics of Fluids, 2005, 17(7):5110-5115.
[11]	Poncet S, Serre E, Le Gal P.Revisiting the two first instabilities of the flow in an annular rotor-stator cavity[J].Physics of Fluids, 2009, 21(6):4106-4112.
[12]	Cros A, Floriani E, Le Gal P, et al.Transition to turbulence of the Batchelor flow in a rotor/stator device[J]. European Journal of Mechanics:Fluids, 2005, 24(4):409-424.
[13]	Séverac E, Poncet S, Serre E, et al.Large eddy simulation and measurements of turbulent enclosed rotor-stator flows[J].Physics of Fluids, 2007, 19(8):5113-5130.
[14]	Craft T J, Iacovides H, Launder B E, et al.Some swirling-flow challenges for turbulent CFD[J].Flow, Turbulence and Combustion, 2008, 80(4):419-434.
[15]	Zacharos A.The use of unsteady RANS in the computation of 3-dimensional flows in rotating cavities[D].Manchester, UK:University of Manchester, 2009.
[16]	Phadke U P, Owen J M.An investigation of ingress for an air cooled shrouded rotating disc system with radial clearance seals[R].ASME Paper, 82-GT-145, 1982.
[17]	ZHAO Xi.Study on flow and heat transfer in rotor-stator turbine disc cavities with complex boundary conditions[D].Beijing:Beijing University of Aeronautics and Astronautics, 2012.(in Chinese)
[18]	Owen J M, Rogers R H.Flow and heat transfer in rotating disc systems:Vol.1 rotor-stator systems[M].New York:Research Studies Press, 1989.

施引文献

资源附件(0)

访问统计

点击查看大图

计量

文章访问数: 1244
HTML浏览量: 3
PDF量: 893
被引次数: 0

姓名
邮箱
手机号码
标题
留言内容
验证码

留言板

Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

doi: 10.13224/j.cnki.jasp.2015.04.002

计量

Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

计量

目录

留言板

Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

doi: 10.13224/j.cnki.jasp.2015.04.002

计量

出版历程

Flow characteristics in a rotor-stator cavity with cooling air inlet at low radius

计量

出版历程

目录