POD analysis of the turbulent boundary layer flow downstream of miniature vortex generators

Chan, C.I.; Chin, Rey

doi:10.1016/j.ijheatfluidflow.2023.109175

Cited by 2 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Funding This work was funded by the Hubei Provincial Natural Science Foundation of China, grant number 2021CFB141, and numerical calculation is supported by the High-Performance Computing Center of Wuhan University of Science and Technology. Structure of a de ector jet servo valve [20] Figure 2 Free submerged jet in pilot stage…”

Section: Declarationsmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Transient Turbulent Flow in the Pilot Stage of a Deflector Jet Servo Valve

Wu,

Zou

2024

Preprint

View full text Add to dashboard Cite

The performance of a deflector jet servo valve is highly affected by the characteristics of the pilot stage flow field. In this paper, the transient results of the large eddy simulation (LES)-based numerical simulation of the pilot stage flow field are presented. The LES results are validated against particle image velocimetry, showing that the LES method can predict the transient turbulent flow. The length of the potential core of the jet assuming from the nozzle and the position of the jet impinging on the V-groove have great relations with the inlet pressure. Traveling cavitation in the deflector begins to appear when the inlet pressure reaches 6 MPa. The increment in inlet pressure enhances cavitation and cavitation shedding. Snapshot proper orthogonal decomposition(snapshot POD) analysis, based on LES, is applied to decompose the instantaneous velocity fluctuation into coherent structures and turbulent velocity components. The relationships between each coherent structure and wall attachment flow, cavitation phenomena, and vortex pairs are discussed. The vortex in Mode 2 contributes to deflecting the jet from the nozzle and causing part of the fluid to flow along the side wall in the V-groove. Through the fast Fourier transform (FFT) result of the POD coefficient, it is known that the traveling cavitation near the side wall of the V-groove is related to Mode 4. This research contributes to the mathematical modeling and improving the stability of the flow field.

show abstract

Section: Declarationsmentioning

confidence: 99%

“…Chan [20] has used POD to investigate the streamwise turbulent velocity uctuation of an array of miniature vortex generators.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Transient Turbulent Flow in the Pilot Stage of a Deflector Jet Servo Valve

Wu,

Zou

2024

Preprint

View full text Add to dashboard Cite

show abstract

Large-Eddy simulations on interaction flow structures of pulsed jets in a crossflow

Quan,

Sun,

Zhang

et al. 2023

Thermal Science and Engineering Progress

View full text Add to dashboard Cite

POD analysis of the turbulent boundary layer flow downstream of miniature vortex generators

Cited by 2 publications

References 35 publications

Analysis of Transient Turbulent Flow in the Pilot Stage of a Deflector Jet Servo Valve

Analysis of Transient Turbulent Flow in the Pilot Stage of a Deflector Jet Servo Valve

Large-Eddy simulations on interaction flow structures of pulsed jets in a crossflow

Contact Info

Product

Resources

About