• 首页期刊介绍编委会期刊订阅广告合作联系我们English
  • 选择皮肤:
陈佳,胡文兵,陈晓文.前可变面积涵道引射器特性的试验与数值模拟[J].航空动力学报,2020,(2):263~271
前可变面积涵道引射器特性的试验与数值模拟
Experiment and numerical simulation on characteristic of front variable area bypass injector
投稿时间:2019-10-16  
DOI:10.13224/j.cnki.jasp.2020.02.005
中文关键词:  前可变面积涵道引射器(FVABI)  掺混机理  进口总压比  背压  总压损失
英文关键词:front variable area bypass injector (FVABI)  mixing mechanism  inlet total pressure ratio  back pressure  total pressure loss
基金项目:
作者单位
陈佳 Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Chengdu 610500,China 
胡文兵 Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Chengdu 610500,China 
陈晓文 Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Chengdu 610500,China 
摘要点击次数: 44
全文下载次数: 72
中文摘要:
      为了研究主、次流的进口总压比及出口背压对前可变面积涵道引射器(FVABI)工作特性的影响与流动掺混机理,采用试验与三维数值模拟方法对不同进口总压比下引射器工作性能及掺混流场随背压变化规律进行了分析。结果表明:标准k -ε模型用于引射器掺混流场的模拟具有较好的准确性;进口总压比越大,引射器总压损失越大;进口总压比不变,随背压增加,引射器总压损失先减小后增加;进口总压比不变,引射器在背压变化过程中存在总压损失最小点;背压减小时,引射器存在临界工况点,且进口总压比越大达到临界工况点的背压越大,可变涵道比的范围变窄;主、次流掺混过程主要集中在沿气流方向上x/l=03~06位置之间,在黏性力作用下动量、质量充分交换,沿流向截面速度径向分布趋于均匀。
英文摘要:
      In order to study the effects of inlet total pressure ratio and back pressure on the front variable area bypass injector’s (FVABI) performance and mixing mechanisms, experiment method and three-dimensional numerical simulation approach were applied to analyze the injector’s performance with various inlet total pressure ratios and change regularity of main flow and secondary flow mixing flow fields under different inlet total pressure ratios and back pressures. Results revealed that the standard k -ε model had great accuracy in simulating injector mixing flow field. With the enlargement of inlet total pressure ratio, the total pressure loss of the injector increased. When the inlet total pressure ratio was constant, the total pressure loss increased firstly and then decreased as the back pressure ascended. The injector had an operating point with the minimum total pressure loss as the back pressure changed. When the back pressure reduced, there was a critical operating point for the injector, furthermore the injector’s back pressure was higher at its critical operating point if the inlet total pressure ratio got higher, meaning the adjustable bypass ratio range was narrowed down. The mixing process of the main flow and secondary flow was mainly concentrated in the position of x/l=03-06. The momentum and mass adequately exchanged, and the distribution of velocity was radically uniform along the flow direction.
查看全文  查看/发表评论  下载PDF阅读器
关闭
.