叶轮对预旋系统影响的数值研究

推进技术 ›› 2016, Vol. 37 ›› Issue (1): 57-64.

叶轮对预旋系统影响的数值研究

吴衡¹,刘高文¹,冯青¹,王掩刚¹,李毅²

西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,西北工业大学动力与能源学院，陕西西安 710072,中航沈阳发动机设计研究所，辽宁沈阳 110015

发布日期:2021-08-15
作者简介:吴衡，男，博士生，研究领域为旋转盘腔中的流动传热。E-mail:wuheng19911201@live.cn 通讯作者:刘高文，男，副教授，研究领域为旋流传热与发动机空气系统。
基金资助:
国家自然科学基金(51476133)。

Numerical Simulations on Effects of Impellers

School of Power and Energy，Northwestern Poly-Technical University，Xi’an 710072，China,School of Power and Energy，Northwestern Poly-Technical University，Xi’an 710072，China,School of Power and Energy，Northwestern Poly-Technical University，Xi’an 710072，China,School of Power and Energy，Northwestern Poly-Technical University，Xi’an 710072，China and Shenyang Engine Design and Research Institute of?AVIC，Shenyang 110015，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究叶轮在盖板式预旋系统中的作用，基于简化三维模型，在保证系统进口总压总温、出口压力以及供气流量不变的条件下，分别对有/无叶轮的预旋系统流动特性、功耗特性和温降特性进行了稳态数值模拟。结果表明:叶轮通过对盖板腔内的气体做功，提高了气流的旋转比，增大了盖板腔的离心升压效果，并因为降低了供气孔入口气流的相对速度从而减小了供气孔内的压力损失。进而使得喷嘴出口的静压降低，喷嘴进出口压比和喷嘴出口气流旋转比随之增大。最终更高的喷嘴出口气流旋转比会导致预旋系统的整体功耗减小约56.88kW，系统温降提高约10.2K。

关键词: 预旋系统；旋流；叶轮；功耗；温降

Abstract: To study the effects of impellers in a cover-plate pre-swirl system，based on a 3D simplified model，steady numerical simulations were carried out to study the characteristics of the flow，power consumption and temperature reduction in the pre-swirl system with and without impellers，with the inlet total pressure and total temperature，outlet pressure，and the mass flow delivered to the blade being constant. The results show that，as the air accelerated by the impellers，the difference of velocity between the air and the rotating supply holes would be reduced，and the centrifugal boost pressure rise in the cover-plate cavity would be enhanced. And with a smaller velocity difference，the pressure loss at the entrance and in the passage of supply hole will also be reduced. As a result，the static pressure at the outlet of pre-swirl nozzle would be reduced，which would lead to a higher pressure ratio and a higher swirl ratio at the nozzle outlet. Eventually the higher swirl ratio would cause the system power consumption to decrease by 56.88kW and the temperature reduction to increase by 10.2K.

Key words: Pre-swirl system；Rotating flow；Impellers；Power consumption；Temperature reduction

吴衡,刘高文,冯青,王掩刚,李毅. 叶轮对预旋系统影响的数值研究[J]. 推进技术, 2016, 37(1): 57-64.

WU Heng¹,LIU Gao-wen¹,FENG Qing¹,WANG Yan-gang¹,Li Yi². Numerical Simulations on Effects of Impellers[J]. Journal of Propulsion Technology, 2016, 37(1): 57-64.

参考文献

[1] 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 81-GT-132.
[2] Dittmann M, Geis T, Schramm V, et al. Discharge Coefficients of a Preswirl System in Secondary Air Systems[J]. Journal of Turbomachinery, 2002, 124(1): 119-124.
[3] Wilson M, Pilbrow R, Owen J M. Flow and Heat Transfer in a Preswirl Rotor–Stator System[R]. ASME 95-GT-239.
[4] Geis T, Dittmann M, Dullenkopf K. Cooling Air Temperature Reduction in a Direct Transfer Preswirl System[C]. Atlanta: Power for Land Sea and Air, 2003.
[5] Bricaud C, Geis T, Dullenkopf K, et al. Measurement and Analysis of Aerodynamic and Thermodynamic Losses in Pre-Swirl System Arrangements[C]. Montreal: Power for Land Sea and Air, 2007.
[6] Karabay H, Chen J X, Pilbrow R, et al. Flow in a “Cover-Plate” Pre-Swirl Rotor–Stator System[J]. Journal of Turbomachinery, 1999, 121(1): 160-166.
[7] Yan Y, Gord M F, Lock G D, et al. Fluid Dynamics of a Pre-Swirl Rotor-Stator System[C]. Amsterdam: Power for Land Sea and Air, 2002.
[8] Gupta A K, Ramerth D, Ramachandran D. Numerical Simulation of TOBI Flow: Analysis of the Cavity Between a Seal-Plate and HPT Disc with Pumping Vanes[C]. Berlin: Power for Land Sea and Air, 2008.
[9] Wu C, Vaisman B, McCusker K. CFD Analyses of HPT Blade Air Delivery System with and without Impellers[C]. Vancouver: Turbine Technical Conference and Exposition, 2011.
[10] Tian S, Zhang Q, Liu H. CFD Investigation of Vane Nozzle and Impeller Design for HPT Blade Cooling Air Delivery System[C]. San Antonio: Turbine Technical Conference and Exposition, 2013.
[11] 刘高文, 李碧云, 蒋兆午, 等. 预旋角度对预旋孔流动特性的影响[J]. 推进技术, 2012, 33(5): 740-746. (LIU Gao-wen, LI Bi-yun, JIANG Zhao-wu, et al. Effects of Pre-Swirl Angle on Flow Characteristics of Pre-Swirl Nozzle[J]. Journal of Propulsion Technology, 2012, 33(5): 740-746.
[12] 刘高文, 张林, 务卫涛, 等. 长径比对预旋孔流动特性影响的数值研究[J]. 推进技术, 2013, 34(5): 644-650. (LIU Gao-wen, ZHANG Lin, WU Wei-tao, et al. Numerical Simulations on the Flow Characteristics of the Pre-Swirl Nozzles with Different Length-to-Diameter Ratios[J]. Journal of Propulsion Technology, 2013, 34(5): 644-650.)
[13] 张建超, 王锁芳. 带导流片的径向预旋系统流动结构数值研究[J]. 重庆理工大学学报(自然科学版), 2014 , 28(1): 43-48.
[14] Karnahl J, von Wolfersdorf J, Tham K M, et al. CFD Simulations of Flow and Heat Transfer in a Pre-Swirl System: Influence of Rotating-Stationary Domain Interface[C]. Vancouver: Turbine Technical Conference and Exposition, 2011.
[15] 朱晓华, 刘高文, 刘松龄, 等. 带盖板的预旋系统降温和静压损失数值研究[J]. 航空动力学报, 2010, 25( 11):2498-2506. (编辑:朱立影)　　　　　　　　　　　　　*　收稿日期:2014-10-10；修订日期:2014-12-16。基金项目:国家自然科学基金(51476133)。作者简介:吴衡,男,博士生,研究领域为旋转盘腔中的流动传热。E-mail:wuheng19911201@live.cn通讯作者:刘高文,男,副教授,研究领域为旋流传热与发动机空气系统。E-mail:gwliu@nwpu.edu.cn