附面层吸入式进气道内流动损失特性 |
| |
引用本文: | 邓文剑,王占学,周莉,赵海宇. 附面层吸入式进气道内流动损失特性[J]. 航空动力学报, 2023, 38(3): 698-708. DOI: 10.13224/j.cnki.jasp.20210205 |
| |
作者姓名: | 邓文剑 王占学 周莉 赵海宇 |
| |
作者单位: | 西北工业大学动力与能源学院,西安710072 |
| |
基金项目: | 工信部某前瞻性技术研究项目 |
| |
摘 要: | 用数值仿真手段,对进气道内流总压损失采用逐段对比分析的方法,研究了附面层吸入式(BLI)进气道相对于常规S弯进气道的内流总压损失特性。结果表明:进气道出口马赫数不变,较低来流马赫数和较高来流马赫数工况下(方案对应马赫数0.3以下和马赫数0.6以上),BLI进气道产生的流动损失比常规S弯进气道的大,差量达2.4%;中等来流马赫数工况下(本文方案对应马赫数0.3与马赫数0.6之间),BLI进气道产生的流动损失比常规S弯进气道的略小,差量在0.3%以内;流动损失特性间的差异是由于BLI进气道进口前壁面与进口低能附面流改变了进口段流动特性、及在S弯管道内发展的综合作用结果。
|
关 键 词: | 附面层吸入式(BLI)进气道 S弯进气道 飞/发一体化 附面层 流动损失 |
收稿时间: | 2021-04-28 |
Flow losses characteristics of BLI inlet |
| |
Affiliation: | School of Power and Energy,Northwestern Polytechnical University,Xi’an 710072,China |
| |
Abstract: | In order to study the difference and mechanism of the internal flow total pressure loss between the boundary layer ingestion (BLI) inlet and the conventional S-shaped inlet, numerical simulation method was applied and step-by-step comparative analysis of the total pressure loss was carried out. The results showed that, when fan-face Mach number was kept unchanged, the flow loss of BLI inlet was larger than that of the conventional S-shaped inlet under the working conditions of relatively lower and higher Mach number of free-stream (corresponding to below 0.3 or above 0.6), and the maximum difference was 2.4 percent. Under the working condition of medium Mach number of free-stream (corresponding to between 0.3 and 0.6), the flow loss generated by the BLI inlet was slightly smaller than that of the conventional S-shaped inlet, and the maximum difference was 0.3 percent. The combined effect of the fore-wall of the BLI inlet and the low-energy boundary flow changed the flow characteristics in the inlet and developed rapidly in the diffuser of the S-shaped pipeline, leading to the difference in flow loss characteristics. |
| |
Keywords: | |
本文献已被 万方数据 等数据库收录! |
| 点击此处可从《航空动力学报》浏览原始摘要信息 |
|
点击此处可从《航空动力学报》下载全文 |
|