| 引用本文: | 王靖宇,张怀宝,黄国平,等.采用射流掺混增强的前可调面积涵道引射器数值模拟.[J].国防科技大学学报,2019,41(2):69-74,81.[点击复制] |
| WANG Jingyu,ZHANG Huaibao,HUANG Guoping,et al.Numerical investigation of front variable area bypass injector with jet mixing enhancement[J].Journal of National University of Defense Technology,2019,41(2):69-74,81[点击复制] |
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| 采用射流掺混增强的前可调面积涵道引射器数值模拟 |
| 王靖宇1,2, 张怀宝2, 黄国平3, 王光学2, 邓小刚4 |
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(1. 四川大学 空天科学与工程学院， 四川 成都 610065;2. 中山大学 物理学院， 广东 广州 510006;3. 南京航空航天大学 能源与动力学院， 江苏 南京 210016;4. 国防科技大学 空天科学学院， 湖南 长沙 410073)
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| 摘要: |
| 为了提高风扇外涵和核心机驱动风扇级外涵流体的掺混效率，提出一种采用射流掺混增强的前可调面积引射器设计方案。通过数值模拟的手段对流量特性、流动掺混和总压损失等方面进行了研究，并同基准模型进行了对比分析，结果表明：采用波瓣混合器结构的前可调面积引射器设计，显著地增加了较高出口背压工况下风扇外涵的流通能力；新的设计方案不仅没有增加低出口背压工况下的总压损失，还减小了高背压出口工况下的流动损失；流向涡的特征尺度是提高掺混效率的关键，可以进一步优化波瓣混合器几何轮廓，以满足调节机构对结构设计的要求。 |
| 关键词: 变循环发动机 可调面积涵道引射器 射流掺混增强 波瓣混合器 |
| DOI：10.11887/j.cn.201902011 |
| 投稿日期：2017-11-08 |
| 基金项目:中央高校基本科研业务费专项资金资助项目（20822041B4219） |
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| Numerical investigation of front variable area bypass injector with jet mixing enhancement |
| WANG Jingyu1,2, ZHANG Huaibao2, HUANG Guoping3, WANG Guangxue2, DENG Xiaogang4 |
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(1. School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China;2. School of Physics, Sun YatSen University, Guangzhou 510006, China;3. College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;4. College of Aeronautics and Astronautics, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| In order to improve the mixing performance of fan bypass and CDFS (core driven fan stage) bypass, a innovative configuration of FVABI (front variable area bypass injector) with jet mixing enhancement was proposed. Numerical simulation was performed to investigate mass flow rate characteristic, flow mixing and total pressure loss of FVABI configuration with lobed mixer. Compared with the baseline configuration, the predictions are discussed and several conclusions can be summarized. Firstly, the significant improvement in fan bypass mass flow rate is achieved by jet mixing enhanced configuration at high back pressure operating point. Secondly, the performance is not degraded at low back pressure operating situation, but the total pressure loss is decreased at high back pressure operating point. Finally, the characteristic length of stream-wise vortex is the key to improve mixing performance, and the optimization of lobed mixer is available to match further structural requirement of adjust configuration. |
| Keywords: variable cycle engine variable area bypass injector jet mixing enhancement lobed mixer |
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