Experimental investigation of heat transfer in a rotor-stator cavity with cooling air inlet at low radius

被引:39
作者
Luo, X. [1 ]
Wang, L. [1 ]
Zhao, X. [2 ]
Xu, G. [1 ]
Wu, H. [3 ]
机构
[1] Beihang Univ, Natl Key Lab Sci & Technol Aeroengine Aerothermod, Sch Energy & Power Engn, Beijing 100191, Peoples R China
[2] AVIC Guizhou Aeroengine Res Inst, Guiyang 550081, Peoples R China
[3] Univ West Scotland, Sch Engn, Inst Engn & Energy Technol, Paisley PA1 2BE, Renfrew, Scotland
基金
中国国家自然科学基金;
关键词
Rotor-stator system; Heat transfer; Thermochromic liquid crystal; Transient measurement; THERMOCHROMIC LIQUID-CRYSTAL; TURBINE DISK CAVITIES; ROTATING-DISK; JET; INJECTION;
D O I
10.1016/j.ijheatmasstransfer.2014.04.013
中图分类号
O414.1 [热力学];
学科分类号
摘要
This article presents an experimental investigation of the heat transfer characteristics in a typical rotor-stator system with cooling air inlet at low radius under different dimensionless flow rate (C-w) ranges from 1.32 x 10(4) to 4.87 x 10(4) at five different rotational speeds, i.e., 500, 1000, 1500, 2000 and 2500 rpm with a large range of rotational Reynolds numbers 4.18 x 10(5) <= Re-omega, <= 2.484 x 10(6). A transient thermochromic liquid crystal (TLC) technique is employed to obtain the detailed distribution of the Nusselt number (Nu) on the surface of the rotor with effective rotating radius of 350 mm as well as with a maximum gap of 67 mm between the rotor and stator. The relationship between the Nusselt number (Nu) and the turbulent flow parameter (lambda(T)) which has been identified as the parameter governing heat transfer in the rotating disk system is experimentally explored. A numerical model is developed for the investigation of the flow structure inside the rotating cavity and provides a basis for further study in explaining the heat transfer behavior over the rotating disk. It is found that the heat transfer characteristics are strongly affected by the flow structure. Numerical results also clearly show the existence of three flow regimes inside the cavity, namely, viscous regime, co-dominated regime, and inertial regime. The heat transfer characteristics in a rotor-stator system are well explained by the flow structure obtained in the paper. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:65 / 80
页数:16
相关论文
共 30 条
  • [1] [Anonymous], INTERNAL FLOW CONCEP
  • [2] EXPERIMENTAL INVESTIGATION OF THE FLOWFIELD RESULTING FROM THE INTERACTION BETWEEN AN IMPINGING JET AND A ROTATING-DISK
    BRODERSEN, S
    METZGER, D
    [J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE, 1992, 5 (03) : 351 - 358
  • [3] LOCAL HEAT-TRANSFER IN TURBINE DISK CAVITIES .2. ROTOR COOLING WITH RADIAL LOCATION INJECTION OF COOLANT
    BUNKER, RS
    METZGER, DE
    WITTIG, S
    [J]. JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1992, 114 (01): : 221 - 228
  • [4] LOCAL HEAT-TRANSFER IN TURBINE DISK CAVITIES .1. ROTOR AND STATOR COOLING WITH HUB INJECTION OF COOLANT
    BUNKER, RS
    METZGER, DE
    WITTIG, S
    [J]. JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1992, 114 (01): : 211 - 220
  • [5] Heat transfer in an air-cooled rotor-stator system
    Chen, JX
    Gan, X
    Owen, JM
    [J]. JOURNAL OF TURBOMACHINERY-TRANSACTIONS OF THE ASME, 1996, 118 (03): : 444 - 451
  • [6] Childs P. R. N., 2010, Rotating Flow
  • [7] CLIFFORD RJ, 1983, 83GT58 ASME
  • [8] Daily J.W ., 1964, ENCLOSED ROTATING DI
  • [9] Ewa T.-S., 2010, COMPUT METHODS SCI T, V16, P105, DOI [10.12921/CMST.2010.16.01.105-114, DOI 10.12921/CMST.2010.16.01.105-114]
  • [10] Ireland P.T., 2001, European Patent, Patent No. 0847679