Applying Gradually-Varying Riblets for Drag Reduction in Conical Rotating Disk Flows

WU Sen; ZOU Jiaqi; FAN Yicheng; ZHAO Dan

doi:10.11993/j.issn.2096-3920.2026-0005

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WU Sen, ZOU Jiaqi, FAN Yicheng, ZHAO Dan. Applying Gradually-Varying Riblets for Drag Reduction in Conical Rotating Disk Flows[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0005

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WU Sen, ZOU Jiaqi, FAN Yicheng, ZHAO Dan. Applying Gradually-Varying Riblets for Drag Reduction in Conical Rotating Disk Flows[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2026-0005

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Applying Gradually-Varying Riblets for Drag Reduction in Conical Rotating Disk Flows

doi: 10.11993/j.issn.2096-3920.2026-0005

WU Sen^1
,,
ZOU Jiaqi^1
,,
FAN Yicheng^1
,,
ZHAO Dan^{2
,
,}

1.
Military Representative Office in Wuxiarea, Wu′xi 214000, China
2.
Harbin Engineering University, College of Mechanical and Electrical Engineering, Harbin 150000, China

Received Date: 2026-01-07
Accepted Date: 2026-03-09
Rev Recd Date: 2026-03-06

Available Online: 2026-03-19

Abstract

Abstract

Due to structural design requirements, the front shroud of the impeller in the permanent magnet integrated centrifugal pump adopts a tapered rotating disk. However, during operation, compared to a flat disk, the tapered disk increases flow resistance and raises power consumption. To reveal the flow losses in the tapered front shroud region of the centrifugal pump impeller and explore drag reduction optimization methods, a gradually-varying riblet for drag reduction is proposed based on the drag reduction principle of uniform-sized riblets, operating under enclosed flow field conditions and optimized dynamic-static clearances. The drag reduction effect of this gradually-varying riblet was investigated and compared with those of a smooth flat disk and a disk with uniform-sized riblets. The results indicate that by adjusting its geometric dimensions along the radial direction, the gradually-varying riblet can more effectively reorganize the near-wall flow structure, alter streamline patterns and velocity distributions, thereby optimizing the wall shear stress field and achieving effective control over flow separation and turbulent dissipation. For a rotating disk with a given taper angle, arranging gradually-varying riblets on the tapered surface can reduce its drag torque below that of both the smooth flat disk and the disk with uniform-sized riblets. Specifically, at the rated speed, the torque coefficient decreases by 9.9% compared to the smooth flat disk conventionally used for current centrifugal pump impeller shrouds, and by 2.31% compared to the tapered disk with uniform-sized riblets. This study can provide a theoretical reference for the low-resistance design and performance enhancement of centrifugal pump impellers.
- conical rotating disk,
- drag torque,
- gradually-varying riblets,
- drag reduction

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References(21)

References

[1]	哈尔滨工程大学. 轴向磁场一体化永磁自驱叶轮离心泵组: CN202310345694.1[P]. 2023-06-30.
[2]	Xiao M Z, Li Y B, Hu J H, et al. Performance prediction method of aviation fuel pumps based on the energy loss model[J]. Physics of Fluids, 2025, 37(3): 035130. doi: 10.1063/5.0258312
[3]	Liu X F, Sun Y, Zhang S S, et al. Analysis of the effect of groove-type micro-texture on the lubrication performance of stator rubber in screw pumps under different well-site environments[J]. Results in Engineering, 2025, 26: 105416. doi: 10.1016/j.rineng.2025.105416
[4]	刘霞, 王国付, 曹慧晶. 凹坑表面减阻技术数值研究[J]. 当代化工, 2023, 52(1): 167-171. doi: 10.3969/j.issn.1671-0460.2023.01.036 Liu X, Wang G F, Cao H J. Numerical study on drag reduction technology of dimple surface[J]. Contemporary Chemical Industry, 2023, 52(1): 167-171. doi: 10.3969/j.issn.1671-0460.2023.01.036
[5]	Cafiero G, Amico E, Iuso G. Manipulation of a turbulent boundary layer using sinusoidal riblets[J]. Journal of Fluid Mechanics, 2024, 984: 59. doi: 10.1017/jfm.2024.256
[6]	Gao J H, Wang H Y. Molecular dynamics simulation study on the viscosity increasing and drag reducing properties of nanoparticles-enhanced fracturing fluid[J]. Geoenergy Science and Engineering, 2026, 258: 214328. doi: 10.1016/j.geoen.2025.214328
[7]	郝谕, 周瑞平, 魏康, 等. 蜗壳截面形状对舰用离心泵性能特性的影响[J]. 造船技术, 2022, 50(3): 12-1779. Hao Y, Zhou R P, Wei K, et al. Influence of volute section shape on performance characteristics of naval centrifugal pump[J]. Zaochuan Jishu, 2022, 50(3): 12-1779.
[8]	杨世新, 赵海荣, 卢胜, 等. 仿生微结构离心泵的流场和减阻特性研究[J]. 甘肃科学学报, 2025, 37(3): 132-138. Yang S X, Zhao H R, Lu S, et al. Study on flow field and drag reduction characteristics of bionic micro-structure centrifugal pump[J]. Journal of Gansu Sciences, 2025, 37(3): 132-138
[9]	Wen S, Wang W, Wu S. Drag reduction by various micro-grooves in a rotating disk system[J]. Proceedings of the Institution of Mechanical Engineers Part A: Journal of Power and Energy, 2020, 234(1): 110-123. doi: 10.1177/0957650919827214
[10]	Wang X, Wang J, Xu Z, et al. Investigation on the efficacy of water-soluble polymer in reducing drag using a revolving disk apparatus[J]. Journal of Dispersion Science and Technology, 2025, 1-12.
[11]	梁桐, 李家文, 徐阳等. 封闭腔内旋转圆盘阻力扭矩特性和微沟槽减阻研究[J]. 推进技术, 2021, 42(07): 1512-1521. doi: 10.13675/j.cnki.tjjs.200646 Liang T, Li J W, Xu Y, et al. Resistant torque and micro-riblet drag reduction of enclosed rotational disks[J]. Journal of Propulsion Technology, 2021, 42(07): 1512-1521. doi: 10.13675/j.cnki.tjjs.200646
[12]	Zhao Z L, Deng Q H, Hu L H, et al. Skin-friction coefficient model verification and flow characteristics analysis in disk-type gap for radial turbomachinery[J]. Applied Sciences, 2023, 13(18): 10354. doi: 10.3390/app131810354
[13]	刘德俊, 于洋, 王国付, 等. 三种形状肋条减阻特性与机理研究[J]. 工程热物理学报, 2016, 37(7): 1411-1415. Liu D J, Yu Y, Wang G F, et al. The characteristic and mechanism of three different shapes of riblets on drag reduction[J]. Journal of Engineering Thermophysics, 2016, 37(7): 1411-1415.
[14]	Pang Y, Zhang Y X, Zhang T J, et al. Analysis of drag reduction and partial setup of riblets surface on the airfoil[J]. Physics of fluids, 2024, 36(10): 105134. doi: 10.1063/5.0231798
[15]	Mawignon F J, Qin, L. G, Kouediatouka A N, et al. Optimized three-dimensional cuboidal shark-inspired riblets for enhanced drag reduction in turbulent flow[J]. Ocean engineering, 2025, 318: 1.1-1.13. doi: 10.1016/j.oceaneng.2024.120199
[16]	Rashed M K, Abdulbari H A, Salleh M A M, et al. Effect of structure height on the drag reduction performance using rotating disk apparatus[J]. Fluid Dynamics Research, 2017, 49(1): 015507. doi: 10.1088/1873-7005/49/1/015507
[17]	Liang T, Xu Y, Li J W, et al. Flow structures and wall parameters on rotating riblet disks and their effects on drag reduction[J]. Alexandria Engineering Journal, 2022, 61(4): 2673-2686. doi: 10.1016/j.aej.2021.07.029
[18]	李沁阳, 胡亚辉, 陈坚, 等. 叶片表面仿生微结构对离心泵减阻性能的影响[J]. 机电工程, 2025, 42(04): 789-797. doi: 10.3969/j.issn.1001-4551.2025.04.019 Li Q Y, Hu Y H, Chen J, et al. Effect of biomimetic microstructure on blade surface on drag reduction performance of centrifugal pump[J]. Journal of Mechanical & Electrical Engineering, 2025, 42(04): 789-797. doi: 10.3969/j.issn.1001-4551.2025.04.019
[19]	Zhang C C, Wang J, Shang Y E. Numerical simulation on drag reduction of revolution body through bionic riblet surface[J]. Science China Technological Sciences, 2010, 53: 2954-2959. doi: 10.1007/s11431-010-4140-z
[20]	韩红彪, 高善群, 李济顺, 等. 基于边界层理论的盘形转子流体阻力研究[J]. 机械科学与技术, 2015, 34(10): 1621-1625. Han H B, Gao S Q, Li J S, et al. Exploring fluid resistance of disk rotor based on boundary layer theory[J]. Mechanical Science and Technology for Aerospace Engineering, 2015, 34(10): 1621-1625.
[21]	黄泽钊, 宋文武, 王宏伟, 等. 径向间隙对离心泵流动特性影响数值模拟研究[J]. 中国农村水利水电, 2024(6): 185-192. doi: 10.12396/znsd.231515 Huang Z Z, Song W W, Wang H W, et al. Numerical simulation of influence of radial clearance on flow characteristics of centrifugal pump[J]. China Rural Water and Hydropower, 2024(6): 185-192. doi: 10.12396/znsd.231515