气冷环向稳定器张角对混合扩压器性能影响

推进技术 ›› 2016, Vol. 37 ›› Issue (12): 2312-2319.

气冷环向稳定器张角对混合扩压器性能影响

刘友宏,周开福,牛俊杰

北京航空航天大学能源与动力工程学院，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191,北京航空航天大学能源与动力工程学院，北京 100191

发布日期:2021-08-15
作者简介:刘友宏，男，博士，教授，研究领域为传热传质、红外、力学等研究。

Effects of Air-Cooled Ring Stabilizator Opening Angle

School of Jet Propulsion，Beijing University of Aeronautics and Astronautics，Beijing 100191，China,School of Jet Propulsion，Beijing University of Aeronautics and Astronautics，Beijing 100191，China and School of Jet Propulsion，Beijing University of Aeronautics and Astronautics，Beijing 100191，China

Published:2021-08-15

摘要/Abstract

摘要： 为了研究气冷环向稳定器张角对混合扩压器性能的影响规律，针对一种混合扩压器和气冷稳定器一体化新型结构，基于N-S方程建立了流场三维数值计算模型，采用数值模拟研究了气冷环向稳定器张角对混合扩压器流场、热混合效率和流动损失的影响规律。结果表明:在气冷稳定器的诱导作用下，外涵冷空气大量入侵内涵高温燃气，使内外涵流体之间进行强力掺混，大大提高了外涵冷空气温度；随着气冷环向稳定器张角的增大，稳定器堵塞比增大，流动损失增大，总压恢复系数减小；14°张角模型的混合扩压器总压恢复系数最大，其值为0.992，比最小值大0.002；此外，热混合效率随气冷环向稳定器张角的增加变化较小，加力燃烧室出口热混合效率最大值与最小值仅相差1.6%。

关键词: 混合扩压器；气冷环向稳定器；张角；热混合效率；总压恢复系数

Abstract: In order to study the effects of air-cooled ring stabilizator opening angle on performance of the mixer and diffuser，for a new type of the mixer-diffuser and air-cooled stabilizator integration structure，the three-dimensional numerical simulation model based on the N-S equation was created. Through numerical simulation，the flow field，thermal mixing efficiency and flow loss of effect of different air-cooled ring stabilizator opening angles in the mixer and diffuser were obtained. The results show that，with the induction effect of air-cooled stabilizator，a large number of the fan cold flow invades the high temperature gas of the core flow，so that making a strong mixing between the core and fan flow and greatly improving the temperature of the fan cold flow. With the growing opening angle of air-cooled ring stabilizator，the stabilizator blockage ratio and flow loss increase，but the total-pressure recovery coefficient declines. The model with 14° opening angle has the highest total-pressure recovery coefficient of 0.992，and larger 0.002 than the minimum value. Therefore，the thermal mixing efficiency of the mixer and diffuser change little as the air-cooled ring stabilizator opening angle increases，and the difference between the maximum value and minimum value of thermal mixing efficiency is only 1.6% at the afterburner outlet.

Key words: The mixer and diffuser；Air-cooled ring stabilizator；Opening angle；Thermal mixing efficiency；Total-pressure recovery coefficient

刘友宏,周开福,牛俊杰. 气冷环向稳定器张角对混合扩压器性能影响[J]. 推进技术, 2016, 37(12): 2312-2319.

LIU You-hong,ZHOU Kai-fu,NIU Jun-jie. Effects of Air-Cooled Ring Stabilizator Opening Angle[J]. Journal of Propulsion Technology, 2016, 37(12): 2312-2319.

参考文献

[1] 马梦颖, 金捷, 季鹤鸣. 航空发动机加力燃烧室技术及新颖结构方案[J]. 燃气涡轮试验与研究, 2008, 21(4): 55-59.
[2] 岳巍, 雷志军, 苏尚美, 等. 波瓣混合器涡系结构及射流掺混机理的数值研究[J]. 航空动力学报, 2013, 28(2): 338-347.
[3] 刘友宏, 樊超, 谢翌, 等. 波瓣数对波瓣强迫混合排气系统性能影响[J]. 航空动力学报, 2010, 25(8): 1683-1689.
[4] 谢翌, 刘友宏. 瓣高宽比对波瓣强迫混合排气系统性能影响[J]. 航空动力学报, 2010, 25(12): 2787-2794.
[5] 刘友宏, 谢翌, 郭楠. 尾缘凹扇及综合修形对波瓣混合器性能影响[J]. 航空动力学报, 2010, 25(2):243-250.
[6] Mengle V G. Internal Flow and Noise of Chevrons and Lobe Mixers in Mixed-Flow Nozzles[R]. AIAA 2006-623.
[7] McCormick D C, Jr Bennett J C. Vertical and Turbulent Structure of a Lobed Mixer Free Shear Layer [J]. AIAA Journal, 1994, 32(9): 1852-1859.
[8] 谢翌, 阮登芳, 钟晨, 等. 波瓣帽罩结构和脊线对混合排气系统性能影响[J]. 推进技术, 2014, 35(3): 314-319. (XIE Yi, RUAN Deng-fang, ZHONG Chen, et al. Effects of Lobe Cap and Crest Line on Performance of Mixing Exhaust System[J]. Journal of Propulsion Technology, 2014, 35(3): 314-319.)
[9] Abolfadl M A, Metwally M A, El-Messiry M A, et al. Experimental Investigation of Lobed Mixer Performance[J]. Journal of Propulsion and Power, 2011, 17(5): 1109-1116.
[10] Mengle V G, Dalton W N. Lobed Mixer Design for Noise Suppression: Acoustic and Aerodynamic Test Data Analysis[R]. NASA, CR-2002-210823.
[11] 张哲衡, 王东明, 张宝华, 等. 波瓣混合器流场试验[J]. 航空动力学报, 2014, 29(8): 1761-1768.
[12] Cooper N J, Merati P, Hu H. Numerical Simulation of the Vertical Structures in a Lobed Jet Mixing Flow[R]. AIAA 2005-635.
[13] 谢翌, 李腾, 刘友宏. 波瓣混合器混合流场中涡结构的数值研究[J]. 科学技术与工程, 2011, 11(32): 7972-7978.
[14] 刘友宏, 谢翌. 菊花形混合器混合效率理论计算[J]. 航空动力学报, 2009, 24(4): 740-745.
[15] XIE Yi, LIU Youhong. A Modified Thermal Mixing Efficiency and Its Application to Lobed Mixer Nozzle for Aero-Engines[J]. Heat Transfer Research, 2011, 42(4): 317-335.
[16] 郭楠. 菊花形混合器流场计算与设计优化[D]. 北京:北京航空航天大学, 2008. (编辑:史亚红)　　　　　　　　　　　　　*　收稿日期:2015-07-08；修订日期:2015-08-31。作者简介:刘友宏,男,博士,教授,研究领域为传热传质、红外、力学等研究。E-mail: liuyh2@qq.com