Computational comparison of passive control for cavitation suppression on cambered hydrofoils in sheet, cloud, and supercavitation regimes DOI
Prabhakar Kumar, Nidhi Sharma, Sudip K. Pattanayek

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(10)

Published: Oct. 1, 2024

Cavitation is a transient, highly complex phenomenon found in numerous applications and can have significant impact on the characteristics as well performance of hydrofoils. This study compares evolution transient cavitating flow over NACA4412(base) (NACA stands for National Advisory Committee Aeronautics) cambered hydrofoil same modified with pimple finite (circular) trailing edge. The assessment covers sheet, cloud, supercavitation regimes at an 8° angle attack Reynolds number 1×106, cavitation numbers ranging from 0.9 to 0.2. aims comprehensively understand role rectangular controlling its hydrodynamic across these regimes. Numerical simulations were performed using realizable model Zwart–Gerber–Belamri (ZGB) resolve turbulence effects. accuracy present numerical predictions has been verified both quantitatively qualitatively available experimental results. analysis includes time cavities, temporal variation total cavity volume, time-averaged distributions vapor volume fractions along chord length, their parameters. Results demonstrate that pimples impacts different In sheet regime (σ=0.9), NACA4412(pimpled) exhibits minimal length changes compared hydrofoil. cloud (σ=0.5), initiation occurs differently, starting pimpled location hydrofoil, unlike just downstream nose case base (σ=0.2), remains comparable, but larger (σ=0.5 σ=0.2) after initial fluctuations. Furthermore, shows 41%, 36%, 17% lower lift coefficients, 46%, 27%, 9% drag coefficients supercavitation, respectively.

Language: Английский

Numerical simulation of cryogenic cavitating flow by an extended transport-based cavitation model with thermal effects DOI
Mingjiang Liu, Wei Li, Haoming Li

et al.

Cryogenics, Journal Year: 2023, Volume and Issue: 133, P. 103697 - 103697

Published: June 5, 2023

Language: Английский

Citations

10
Effect of Unsteady Cavitation on Hydrodynamic Performance of NACA 4412 Hydrofoil with Novel Triangular Slot DOI Creative Commons
Sayan Biswas,

R. Harish

Heliyon, Journal Year: 2025, Volume and Issue: 11(3), P. e42266 - e42266

Published: Jan. 27, 2025

Language: Английский

Citations

0
Investigation of numerical solution approaches for the cavitating flow analysis of twisted hydrofoils DOI
Sinem Öksüz, Onur Usta,

Fahri Çelik

et al.

Ocean Engineering, Journal Year: 2024, Volume and Issue: 312, P. 119198 - 119198

Published: Sept. 23, 2024

Language: Английский

Citations

2
Computational investigation of cavitating flow on 3D NACA4412 hydrofoil with arc dimple DOI
Prabhakar Kumar,

Srijna Singh,

S. Rajesh Reddy

et al.

Materials Today Proceedings, Journal Year: 2023, Volume and Issue: unknown

Published: Aug. 1, 2023

Language: Английский

Citations

2
Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet Nozzle DOI Creative Commons
Y. Zhao, Geng Li, Fei Zhao

et al.

Journal of Applied Fluid Mechanics, Journal Year: 2023, Volume and Issue: 16(11)

Published: Sept. 3, 2023

The self-excited oscillating cavitation jet nozzle (SEOCJN) serves as a crucial component for converting hydrostatic energy into dynamic pressure and ensuring optimal hydraulic performance of cavitating jets. Thus, it is significance to understand the characteristics influence law SEOCJN its extensive industrial applications. This paper utilizes numerical simulation methods analyze process initiation, development, outlet SEOCJN. It explores effects inlet flow rate on frequency SEOCJN, establishes mathematical relationship between oscillation frequency. results indicate that has an diameter (D1) 4.7 mm, (D2) 12.2 length (L) 52 chamber (D) 83 angle 120°, (Pin) 4.8 MPa. At these parameters, pulse reaches 830.01 Hz, with internal period approximately 0.0024 s. maximum vapor volume fraction found be located 0.28 m from Furthermore, increases increase in pressure. These findings provide theoretical basis application nozzles.

Language: Английский

Citations

2
Fluid flow analysis of unsteady cavitating flow over MHKF-180s hydrofoil DOI

Aryaman Sachdeva,

Srijna Singh,

Mohammad Danish

et al.

Materials Today Proceedings, Journal Year: 2023, Volume and Issue: unknown

Published: Sept. 1, 2023

Language: Английский

Citations

1
Energy loss analysis in cavitation flow of a continuous-resistance trim DOI

Xue-yang Wei,

Qian Xu,

Zhi-jie Zhu

et al.

Nuclear Engineering and Design, Journal Year: 2024, Volume and Issue: 421, P. 113126 - 113126

Published: March 14, 2024

Language: Английский

Citations

0
Numerical Investigation of Cavitating Base MHKF-180s and Modified MHKF-180s Hydrofoils DOI

Aryaman Sachdeva,

Srijna Singh,

Mohammad Danish

et al.

Lecture notes in mechanical engineering, Journal Year: 2024, Volume and Issue: unknown, P. 15 - 28

Published: Jan. 1, 2024

Language: Английский

Citations

0
Computational comparison of passive control for cavitation suppression on cambered hydrofoils in sheet, cloud, and supercavitation regimes DOI
Prabhakar Kumar, Nidhi Sharma, Sudip K. Pattanayek

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(10)

Published: Oct. 1, 2024

Cavitation is a transient, highly complex phenomenon found in numerous applications and can have significant impact on the characteristics as well performance of hydrofoils. This study compares evolution transient cavitating flow over NACA4412(base) (NACA stands for National Advisory Committee Aeronautics) cambered hydrofoil same modified with pimple finite (circular) trailing edge. The assessment covers sheet, cloud, supercavitation regimes at an 8° angle attack Reynolds number 1×106, cavitation numbers ranging from 0.9 to 0.2. aims comprehensively understand role rectangular controlling its hydrodynamic across these regimes. Numerical simulations were performed using realizable model Zwart–Gerber–Belamri (ZGB) resolve turbulence effects. accuracy present numerical predictions has been verified both quantitatively qualitatively available experimental results. analysis includes time cavities, temporal variation total cavity volume, time-averaged distributions vapor volume fractions along chord length, their parameters. Results demonstrate that pimples impacts different In sheet regime (σ=0.9), NACA4412(pimpled) exhibits minimal length changes compared hydrofoil. cloud (σ=0.5), initiation occurs differently, starting pimpled location hydrofoil, unlike just downstream nose case base (σ=0.2), remains comparable, but larger (σ=0.5 σ=0.2) after initial fluctuations. Furthermore, shows 41%, 36%, 17% lower lift coefficients, 46%, 27%, 9% drag coefficients supercavitation, respectively.

Language: Английский

Citations

0