PMID- 34709794
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20230926
IS  - 1944-8252 (Electronic)
IS  - 1944-8244 (Linking)
VI  - 13
IP  - 44
DP  - 2021 Nov 10
TI  - Low Air Drag Surface via Multilayer Hierarchical Riblets.
PG  - 53155-53161
LID - 10.1021/acsami.1c13456 [doi]
AB  - Riblets inspired by shark skin exhibit a great air drag reduction potential in 
      many industries, such as the aircraft, energy, and transportation industries. 
      Many studies have reported that blade riblets attain the highest air drag 
      reduction ability, with a current limit of  approximately 11%. Here, we propose multilayer 
      hierarchical riblets (MLHRs) to further improve the air drag reduction ability. 
      MLHRs were fabricated via a three-layer hybrid mask lithography method, and the 
      air drag reduction ability was studied in a closed air channel. The experimental 
      results indicated that the maximum air drag reduction achieved with MLHRs in the 
      closed channel was 16.67%, which represents a 52% higher reduction than the 
      highest previously reported. Conceptual models were proposed to explain the 
      experiments from a microscopic perspective. MLHRs enhanced the stability of 
      lifting and pinning vortices, while vortices gradually decelerated further, 
      reducing the momentum exchange occurring near the wall. This verified that MLHRs 
      overcome the current air drag reduction limit of riblets. The conceptual models 
      lay a foundation to further improve the air drag reduction ability of riblets.
FAU - Zhou, ZiDan
AU  - Zhou Z
AUID- ORCID: 0000-0002-2505-3294
AD  - Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and 
      Shaanxi Key Laboratory of Micro and Nano Electromechanical Systems, School of 
      Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, P. 
      R. China.
FAU - Wang, ShengKun
AU  - Wang S
AD  - Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and 
      Shaanxi Key Laboratory of Micro and Nano Electromechanical Systems, School of 
      Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, P. 
      R. China.
FAU - Yan, ZeXiang
AU  - Yan Z
AD  - Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and 
      Shaanxi Key Laboratory of Micro and Nano Electromechanical Systems, School of 
      Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, P. 
      R. China.
FAU - Wang, DaoYuan
AU  - Wang D
AD  - Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and 
      Shaanxi Key Laboratory of Micro and Nano Electromechanical Systems, School of 
      Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, P. 
      R. China.
FAU - Deng, JinJun
AU  - Deng J
AD  - Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and 
      Shaanxi Key Laboratory of Micro and Nano Electromechanical Systems, School of 
      Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, P. 
      R. China.
FAU - He, Yang
AU  - He Y
AUID- ORCID: 0000-0003-4659-9349
AD  - Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and 
      Shaanxi Key Laboratory of Micro and Nano Electromechanical Systems, School of 
      Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, P. 
      R. China.
FAU - Yuan, WeiZheng
AU  - Yuan W
AUID- ORCID: 0000-0001-9490-7188
AD  - Key Laboratory of Micro/Nano Systems for Aerospace, Ministry of Education and 
      Shaanxi Key Laboratory of Micro and Nano Electromechanical Systems, School of 
      Mechanical Engineering, Northwestern Polytechnical University, Xi'an 710072, P. 
      R. China.
LA  - eng
PT  - Journal Article
DEP - 20211028
PL  - United States
TA  - ACS Appl Mater Interfaces
JT  - ACS applied materials & interfaces
JID - 101504991
SB  - IM
OTO - NOTNLM
OT  - air drag reduction
OT  - closed air channel
OT  - low air drag surface
OT  - multilayer hierarchical riblets (MLHRs)
OT  - vortex behavior
EDAT- 2021/10/29 06:00
MHDA- 2021/10/29 06:01
CRDT- 2021/10/28 17:12
PHST- 2021/10/29 06:01 [medline]
PHST- 2021/10/29 06:00 [pubmed]
PHST- 2021/10/28 17:12 [entrez]
AID - 10.1021/acsami.1c13456 [doi]
PST - ppublish
SO  - ACS Appl Mater Interfaces. 2021 Nov 10;13(44):53155-53161. doi: 
      10.1021/acsami.1c13456. Epub 2021 Oct 28.