Numerical simulation of effects of partial nozzle closure on uniformity of parameters in pre-swirl air supply system
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摘要: 为了研究部分喷嘴关闭对预旋供气系统的供气流量和供气温度及其均匀性的影响,采用稳态的固定转子相位法对180°旋转盘腔进行了数值模拟,并通过改变转子相位的稳态计算来近似模拟瞬态问题的时空变化特性。结果表明:在设计点工况(系统压比为1.32,旋转马赫数为0.678)下,喷嘴流通面积关闭14.3%时,引气总流量和供气总流量分别下降10.9%和9.9%。单个供气孔流量的波动幅度由1.1%增大为5.4%。供气的相对总温降低1 K左右,波动幅度由约0.5 K增大为1.5 K。Abstract: In order to study the influence of the partial nozzle closure on the air supply mass flow rate, air supply temperature and circumferential uniformity of the air supply parameters of the pre-swirl air supply system, the steady-state method with frozen rotor approach was used to simulate the 180° rotating disk cavity model, and the time-space characteristics of transient problems were approximated by changing the rotor phase in the steady-state calculations. Results showed that: at the design point condition(system pressure ratio of 1.32 and rotating Mach number of 0.678), when the flow area of nozzle was closed by 14.3%, the total bleed air flow and total air supply flow decreased by 10.9% and 9.9%, respectively. The amplitude of fluctuation of the flow rate of a single supply hole increased from 1.1% to 5.4%. The relative total temperature of supply air decreased about 1 K, and the amplitude of fluctuation increased from 0.5 K to 1.5 K.
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Key words:
- pre-swirl air supply system /
- pre-swirl nozzle /
- active control /
- rotating disc cavity /
- rotor phase /
- non-uniformity
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[1] 刘松龄,陶智.燃气涡轮发动机的传热和空气系统[M].上海:上海交通大学出版社,2018. [2] MEIERHOFER B,FRANKLIN C J.An investigation of a pre-swirled cooling airflow to a turbine disc by measuring the air temperature in the rotating channels[R].ASME Paper 81-GT-132,1981. [3] EL-OUN Z B,OWEN J M.Pre-swirl blade cooling effectiveness in an adiabatic rotor-stator system[R].ASME Paper 88-GT-267,1988. [4] CHEW J W,HILLS N J,KHALATOV S,et al.Measurement and analysis of flow in a pre-swirled cooling air delivery system[R].ASME Paper 2003-GT-38084,2003. [5] POPP O,ZIMMERMAN H,KUTZ J.CFD analysis of coverplate receiver flow[R].ASME Paper 96-GT-357,1996. [6] KARABAY H,WILSON M,OWEN J M.Approximate solutions for flow and heat transfer in pre-swirl rotating-disc systems[R].ASME Paper 2001-GT-0200,2001. [7] BENIM A C,BRILLERT D,CAGAN M.Investigation into the computational analysis of direct-transfer pre-swirl systems for gas turbine cooling[R].ASME Paper 2004-GT-54151,2004. [8] 罗翔,冯野,徐国强,等.直接供气预旋转静系流动和换热数值模拟[J].航空动力学报,2012,27(10):2188-2193. LUO Xiang,FENG Ye,XU Guoqiang,et al.Numerical simulation of flow and heat transfer performances in a direct transfer pre-swirl system[J].Journal of Aerospace Power,2012,27(10):2188-2193.(in Chinese) [9] 王锁芳,朱强华,张羽,等.预旋进气位置对转静盘腔换热影响的数值研究[J].航空动力学报,2007,22(8):1227-1232. WANG Suofang,ZHU Qianghua,ZHANG Yu,et al.Numerical studies of heat transfer in a rotor-stator cavity with different radial positions of pre-swirl inlet[J].Journal of Aerospace Power,2007,22(8):1227-1232.(in Chinese) [10] 朱晓华,刘高文,刘松龄,等.带盖板的预旋系统温降和压力损失数值研究[J].航空动力学报,2010,25(11):2498-2506. ZHU Xiaohua,LIU Gaowen,LIU Songling,et al.Numerical studies of temperature drop and pressure loss in a cover-plate preswirl system[J].Journal of Aerospace Power,2010,25(11):2498-2506.(in Chinese) [11] 孙占东,罗翔,黄由之,等.预旋结构影响带盖盘预旋系统流动的实验[J].推进技术,2017,38(8):1826-1832. SUN Zhandong,LUO Xiang,HUANG Youzhi,et al.Experiment of flow of a cover-plate preswirl system influenced by preswirl structure[J].Journal of Propulsion Technology,2017,38(8):1826-1832.(in Chinese) [12] ZHANG Feng,WANG Xinjun,LI Jun.Numerical investigation of flow and heat transfer characteristics in radial pre-swirl system with different pre-swirl nozzle angles[J].International Journal of Heat and Mass Transfer,2016,95:984-995. [13] WU Heng,LIU Gaowen,WU Zhipeng,et al.Measurement of pressures and temperatures in a cover-plate pre-swirl system[R].ASME Paper 2018-GT-75671,2018. [14] LIU Gaowen,WU Heng,FENG Qing,et al.Theoretical and numerical analysis on the temperature drop and power consumption of a pre-swirl system[R].ASME Paper 2016-GT-56742,2016. [15] LIU Yuxin,LIU Gaowen,KONG Xiaozhi,et al.Design and numerical analysis of a vane shaped receiver hole in a cover-plate preswirl system[J].Journal of Engineering for Gas Turbines and Power,2018,141(4):041001.1-041001.10. [16] LIU Yuxin,LIU Gaowen,KONG Xiaozhi,et al.Experimental testing and numerical analysis on the nozzle effects in preswirl system[J].Journal of Propulsion and Power,2018,34(4):1015-1025. [17] 梁靓,刘高文,雷昭,等.预旋系统稳态和非稳态计算对比研究[J].推进技术,2019,40(11):2546-2553. LIANG Liang,LIU Gaowen,LEI Zhao,et al.A comparative study on steady and unsteady calculations of a pre-swirl system[J].Journal of Propulsion Technology,2019,40(11):2546-2553.(in Chinese)
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