For Libraries For Publication Open Access Downloads About Us Contact Us
Paper Titles
Technological Process of 500MPa Hot-Rolled Ribbed Steel Bar
p.35
Flocculation Process for the Treatment of Ballast Water Application Research Process
p.39
Numerical Investigation of Flow Past a Backward-Facing Step Using a Multi-Scale Turbulence Model
p.45
Numerical Investigation of Flow in an Asymmetric Plane Diffuser Using a Multi-Scale Turbulence Model
p.51
Research on Drag Reduction Performance of Bionic Shark Gill Jet Surface
p.57
Fracture Analysis of a Crankshaft Used for Heavy-Duty Truck
p.61
Strength Analysis of Diesel Engine Crankshaft Based on Flexible Multi-Body Dynamics
p.65
Experimental Research on High Temperature Corrosion Prevention Technology for Water Wall of Opposed Wall Fired Ultra Supercritical Boiler
p.69
An Novel Computational Method and Application to Reconstruction of Dynamic Loads on a Plate
p.74

Research on Drag Reduction Performance of Bionic Shark Gill Jet Surface

Article Preview

Abstract:

According to the problem of bionic shark gill jet can reduce friction on shark surface, a model of bionic jet surface was established based on shark surface was analyzed by measurements, and its numerical simulation was processed by using RNG k-ε turbulence model. The results show that: the gill jet can reduce frictional resistance on shark surface, and the best drag reduction can be got when the speed of main field is 5m/s, furthermore the maximum drag reduction rate can be up to 17.15%. The pressure of jet hole upstream is reduced which due to the barrier to the facing fluid by the jet, so that the pressure resistance of jet surface is reduced as well. Besides, jet fluid is blocked in the boundary layer by mainstream fluid, which caused the fluid velocity of jet hole downstream is reduced, the thickness of boundary layer is increased, and the normal velocity gradient of wall is reduced, so as to achieve the effect of drag reduction.

You might also be interested in these eBooks
Mechanical and Electronics Engineering VI View Preview

Info:

Periodical:

Applied Mechanics and Materials (Volume 654)

Pages:

57-60

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.654.57

Citation:

Cite this paper

Online since:

October 2014

Authors:

Zhao Gang, Fang Li, Wei Xin Liu, Ming Ming Liu, Hong Shi Bi

Keywords:

Boundary Layer, Drag Reduction, Jet Surface, Numerical Simulation, Wall Shear Stress

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2014 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] Jinjun Wang. Journal of Beijing University of Aeronautics and Astronautics, Vol. 24 (1998), pp.31-34. (In Chinese).

Google Scholar

[2] Bechert D W, Bruse M, Hage W, et al. J Fluid Mech, Vol. 338 (1997), pp.59-87.

Google Scholar

[3] Hee-Chang Lim, Sang-Joon Lee. Fluid Dynamics Research, Vol. 35 (2004), pp.107-122.

Google Scholar

[4] Xinhua LI, Shouping Dong, Zhiyong Zhao. Journal of Experiments in Fluid, Vol. 20 (2006), pp.40-44. (In Chinese).

Google Scholar

[5] Walsh M J. AIAA Journal, Vol. 21 (1983), pp.485-486.

Google Scholar

[6] Fomin V M, Fomichev V P, Korotaeva T A, et al. AIAA Journal, Vol. 40 (2002), pp.1170-1177.

Google Scholar

[7] Gang Zhao, Fang Li, Dongyang Zang. Journal of Harbin Engineering University, Vol. 35 (2014), pp.361-367. (In Chinese).

Google Scholar

© 2025 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied.
Scientific.Net is a registered trademark of Trans Tech Publications Ltd.