Next Article in Journal
Findings of Case-Study Analysis: System-Level Biomimicry in Built-Environment Design
Next Article in Special Issue
Biomimetic Groundwork for Thermal Exchange Structures Inspired by Plant Leaf Design
Previous Article in Journal
Mimicking Sub-Structures Self-Organization in Microtubules
Previous Article in Special Issue
Study on the Heat Reduction Effect of Biomimetic Unidirectional Transporting Channels Inspired by Nepenthes alata
Open AccessArticle

Development of Mixed Flow Fans with Bio-Inspired Grooves

by Jinxin Wang 1,2,3, Toshiyuki Nakata 2 and Hao Liu 1,2,3,*
1
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2
Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
3
Shanghai Jiao Tong University and Chiba University International Cooperative Research Center, Dongchuan Road 800, Shanghai 200240, China
*
Author to whom correspondence should be addressed.
Biomimetics 2019, 4(4), 72; https://doi.org/10.3390/biomimetics4040072
Received: 30 June 2019 / Revised: 9 October 2019 / Accepted: 10 October 2019 / Published: 18 October 2019
(This article belongs to the Special Issue Selected Papers from ICBE2019)
Mixed flow fan is a kind of widely used turbomachine, which has faced problems of further performance improvement in traditional design methods in recent decades. Inspired by the microgrooves such as riblets and denticles on bird feathers and shark skins, we here propose biomimetic designs of various blades with the bio-inspired grooves, aiming at the improvement of the aeroacoustic performance. Based on a systematic study with computational fluid dynamic analyses, we found that these designs had the potential in noise suppression even with macroscopic grooves. Our best design can suppress turbulence kinetic energy by approximately 38% at the blade leading edge with aerodynamic efficiency loss of only 0.3 percentage points. This improvement is achieved by passive flow control. The vortical structures are changed in a favorable way at the leading edge due to the grooves. We believe that these biomimetic designs could provide a promising future of enhancing the performance of mixed flow fans by making grooves of ideal flow passages on the suction faces of blades in accord with the theory of pump design. View Full-Text
Keywords: bio-inspired grooves; computational fluid dynamics; mixed flow fan; turbulence kinetic energy; groove forms; groove design parameter exploration bio-inspired grooves; computational fluid dynamics; mixed flow fan; turbulence kinetic energy; groove forms; groove design parameter exploration
Show Figures

Figure 1

MDPI and ACS Style

Wang, J.; Nakata, T.; Liu, H. Development of Mixed Flow Fans with Bio-Inspired Grooves. Biomimetics 2019, 4, 72.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop