体积分数法测量几种转静系中的最小封严流量

孙纪宁; 罗翔; 刘金楠; 徐国强; 周志翔; 邱长波

体积分数法测量几种转静系中的最小封严流量

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
2.
中国航空工业集团公司中国航空动力机械研究所, 湖南株洲 412002

基金项目: 国家自然科学基金(50806004)

计量
- 文章访问数: 2019
- HTML浏览量: 272
- PDF量: 611
- 被引次数: 0
出版历程
- 收稿日期: 2011-09-27
- 刊出日期: 2012-05-28

Volume fraction technique for measuring the minimum value of mass flow in turbine rotor-stator disk cavities

1.
National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2.
China Aviation Powerplant Research Institute, Aviation Industry Corporation of China, Zhuzhou Hunan 412002, China

摘要

摘要: 为防止涡轮盘腔转静系统高温“燃气入侵”现象发生,需要确定最小封严流量.在不同的转速和不同出气间隙下,采用体积分数法分别对6种典型封严结构进行实验研究,以确定它们在不同工况下的最小封严流量并得出其变化规律:在固定的出气间隙值下,最小封严冷气流量随转盘转速的增加而增大,且几乎呈线性变化;对于固定的转速,随着出气间隙的增加,最小封严冷气流量也随之增加.拟合出不同封严结构的级间封严准则函数关系式,并探寻出封严效果最优的封严结构.
- 转静系 /
- 旋转盘腔 /
- 最小封严流量 /
- 高转速 /
- 体积分数法
Abstract: The minimum value of the cooling air flow is a critical flow rate for preventing hot gas ingestion happened in the rotor-stator disk cavity system of turbines.Experimental investigation based on volume fraction technique was performed to found the minimum values of cooling air flow of six typical rim seal structures with different rotating velocities and seal clearances.The results showed that,the minimum value of the seal air flow rate almost increases linearly with rotational velocity,and also increases with the seal clearance.Furthermore,the corresponding correlations about sealing flow rate were fitted for different structures,and an optimum option of rim seal structure was advised.
- rotator-stator system /
- rotating cavity /
- minimum value of the seal flow /
- high rotating speed /
- volume fraction

HTML

参考文献(12)

[1]	Abe T,Kikuchi J,Takeuchi H.An Investigation of Turbine Disc Cooling.Vienna:3rd CIMAC Congress,Paper GT30,1979.
[2]	Kobayashi N,Matsumato M,Shizuya M.An experimental investigation of a gas turbine disk cooling system[J].Engineering for Gas Turbines and Power,1984,106(1):136-141.
[3]	Phadke U P,Owen J M.Aerodynamic aspects of the sealing of gas-turbine rotor-stator systems Part 2:the performance of simple seals in a quasi-axisymmetric external flow[J].International Journal of Heat and Fluid Flow,1988,9(2):106-112.
[4]	Hamabe K,Ishida K.Rim seal system with nonaxisymmetric main flow.ASME Paper 92-GT-160,1992.
[5]	Chew J M,Green T,Turner A B.Rim sealing of rotor-stator wheelspaces in the presence of external flow.ASME Paper 94-GT-126,1994.
[6]	Green T,Turner A B.Ingestion into the upstream wheelspace of an axial turbine stage[J].ASME Journal of Turbomachinery,1994,116(2):327-332.
[7]	Bohn D,Rudzinski B,Sturken N,et al.Experimental and numerical investigation of the influence of rotor blades on hot gas ingestion into the upstream cavity of an axial turbine stage.ASME Paper 2000-GT-284,2000.
[8]	Bohn D,Decker A,Ma H,et al.Influence of sealing air mass flow on the velocity distribution in and inside the rim seal of the upstream cavity of a 1.5-stage turbine.ASME Paper GT2003-38459,2003.
[9]	Bohn D,Wolff M.Improved formulation to determine minimum sealing flow C_w,min for different sealing configurations.ASME Paper GT2003-38465,2003.
[10]	Bohn D,Decker A,Ohlendorf N.Influnce of an axial and radial rim seal geometry on hot gas ingestion into the upstream cavity of a 1.5-stage turbine.ASME Paper GT2006-90453,2006.
[11]	Johnson B,Mack G,Paolillo R,et al.Turbine rim seal gas path floe ingestion mechanisms.AIAA Paper 94-2703,1994.
[12]	Phadke U P,Owen J M.Aerodynamic aspects of the sealing of gas-turbine rotor-stator systems 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.