| 陈璠1，徐朋飞2.“仿生学”沟槽减阻仿真分析及机理研究[J].航空发动机,2021,47(2):28-32 |
| “仿生学”沟槽减阻仿真分析及机理研究 |
| Simulation Analysis and Mechanism Study on Drag Reduction of“ Bionics”Groove |
| |
| DOI： |
| 中文关键词: 沟槽 减阻率 仿生学 局部阻力 沿程阻力 雷诺数 航空发动机 |
| 英文关键词:groove drag reduction rate bionics local resistance loss resistance loss along the way Reynolds number aeroengine |
| 基金项目:航空动力基础研究项目资助 |
|
| 摘要点击次数: 1517 |
| 全文下载次数: 1499 |
| 中文摘要: |
| “仿生学”沟槽结构在航空发动机叶片减阻和燃滑油系统减阻等领域有潜在的应用前景。为获得该结构构型参数和雷
诺数对减阻效果的影响规律，通过对鲨鱼及海豚表皮特征进行仿生设计了横向和纵向沟槽，利用数值模拟方法对不同沟槽构型在
不同雷诺数下的减阻效果开展了对比研究和机理分析。结果表明：横向和纵向沟槽构型减阻率均随雷诺数增大而减小，并且雷诺
数影响占主导地位。对于横向沟槽构型，沟槽间距较大的构型沿程阻力占主导，在相对高雷诺数下减阻效果较好；沟槽数量较多
的构型局部阻力占主导，在相对低雷诺数下减阻效果较好；无间距构型在相对低雷诺数下减阻效果最好，减阻率约为4.14%。对
于纵向沟槽构型，减阻率比横向沟槽的高约1个百分点，雷诺数对减阻效果影响不大。 |
| 英文摘要: |
| "Bionics" groove structure has potential application prospect in fields of aeroengine blades drag reduction and fuel/oil
system drag reduction. In order to obtain the structure configuration parameters and the influence of the Reynolds number on the drag
reduction，transverse and longitudinal grooves were designed with the bionics of the skin characteristics of sharks and dolphins.
Comparative study and mechanism analysis of drag reduction effect were carried out for different groove configuration by numerical
simulation method under different Reynolds number. The results show that the drag reduction rates of both transverse and longitudinal
grooves configuration decrease with the increase of Reynolds number，and the influence of Reynolds number is dominant. For the
transverse groove with larger groove gap，the resistance loss along the way is dominant，and the drag reduction effect is better at relatively
high Reynolds number. The local drag is dominant with more grooves，and the drag reduction effect is better at relatively low Reynolds
number. The drag reduction effect of the no gap configuration is the best at relatively low Reynolds number，and the drag reduction rate is
about 4.14%. For the longitudinal groove configuration，the drag reduction rate is about 1% higher than that of the transverse groove
configuration，and Reynolds number has little effect on the drag reduction. |
| 查看全文 查看/发表评论 下载PDF阅读器 |