高负荷对转风扇进口导叶可调对低折合转速通流及效率特性影响研究  

Investigation on the Influence of the Inlet Guide Vane on the Flow Rate and Efficiency Characteristic of a High-load Counter-rotating Fan at Low Corrected Speeds

作　　者：姚卡 赵巍[2,3,4] 裴刚 赵庆军[2,3,4] 徐建中[2,3,4] YAO Ka;ZHAO Wei;PEI Gang;ZHAO Qing-Jun;XU Jian-Zhong(Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230027,China;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China;School of Aeronautics and Astronautics,University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Key Laboratory of Distributed CCHP System,Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学技术大学热科学和能源工程系,合肥230027 [2]中国科学院工程热物理研究所,北京100190 [3]中国科学院大学航空宇航学院,北京100049 [4]中国科学院工程热物理研究所分布式冷热电联供系统北京市重点实验室,北京100190

出　　处：《工程热物理学报》2022年第1期74-81,共8页Journal of Engineering Thermophysics

基　　金：国家重点研发计划(No.2016YFB0901402);国家自然科学基金(No.51806215)。

摘　　要：为提高高负荷对转风扇低折合转速通流能力和效率,分析了对转风扇低折合转速工况流动堵塞和流动损失的原因,提出了采用进口导叶可调改善高负荷对转风扇低折合转速性能的方法。在Ma=3.2、高度15 km飞行条件对应的低折合转速时,高压转子堵塞通道导致对转风扇通流能力和等熵效率下降,最高效率点处通流能力下降42.95%、等熵效率下降1.82%。采用进口导叶可调后,增大进口导叶开度,提高了高压转子入口总压,对转风扇通流能力得到有效提高,在−20°进口导叶开度时,通流能力达到最大,最高压比处通流能力提高7.8%。继续增大开度,通流能力基本保持不变。减小进口导叶开度,低压转子进口气流攻角减小,吸力面分离得到抑制,在+10°进口导叶开度时,效率达到最大值86.60%。To improve the flow rate and efficiency of a high-load counter-rotating fan at low corrected speeds,the reasons for the flow blockage and internal flow loss of the counter-rotating fan at low corrected speeds were analyzed,and a method is proposed to improve the low corrected speeds characteristics of a high-load counter-rotating fan by using inlet guide vane.At the low corrected speed corresponding to the flight conditions of M a=3.2 and an altitude of 15 km,the channel blockage of the high pressure rotor leads to a decrease in the flow rate and isentropic efficiency of the counter-rotating fan,the flow rate and the isentropic efficiency at the peak efficiency point decreased by 42.95%and 1.82%respectively.After adopting the method of inlet guide vane,as the opening degree of the inlet guide vane increases,the inlet total pressure of the high pressure rotor is increased,and the flow rate of the counter-rotating fan is effectively improved.At the opening degree of−20°IGV,the flow rate reaches the maximum,and the flow rate at maximum pressure ratio increases by 7.8%.Continue to increase the opening degree,the flow rate remains basically unchanged.With the decrease of the inlet guide vane’s opening degree,the inlet attack angle of the low pressure rotor is decreased,and the separation area of the suction surface is suppressed,at the opening degree of+10°IGV,the efficiency reaches the maximum value of 86.60%.

关 键 词：进口导叶 开度 低折合转速 高负荷对转风扇 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]