Experimental investigation on impingement of a submerged circular water jet at varying impinging angles and Reynolds numbers

Wang, Chuan; Wang, Xikun; Shi, Weidong; Lü, Wenpeng; Tan, Soon Keat; Zhou, Lian

doi:10.1016/j.expthermflusci.2017.08.005

Cited by 37 publications

(9 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, compared to vertical impinging jets, oblique impinging jets have received relatively less attention; most are water jets in the air, and there are fewer studies on submerged oblique impinging jets. Wang et al [21] analyzed the flow characteristics of impinging jets under various impinging angles and Reynolds numbers through particle image velocity and pressure measurement and found that the jet is more dependent on the impinging angle and relatively independent of the Reynolds number. Mishra et al [22] used particle image velocity measurement to analyze the flow characteristics of oblique submerged jets with impinging angles of 45 • and 26 • and an impinging height of 1D~6D (D is the nozzle diameter).…”

Section: Introductionmentioning

confidence: 99%

Flow Characteristics of Oblique Submerged Impinging Jet at Various Impinging Heights

Zhang

Wang

Liu³

et al. 2022

JMSE

Self Cite

View full text Add to dashboard Cite

To study the influence of impinging height H/D on the flow field characteristics of oblique submerged impinging jets, the numerical calculation of an oblique submerged impinging jet was carried out based on Wray–Agarwal (W–A) turbulence model. The jet flow field structure and pressure distribution under various impinging heights (1 ≤ H/D ≤ 8) when the impinging angle was θ = 45° were analyzed. The results show that with the increase in the impinging height, the diffusion degree of the jet gradually increased and the velocity decreased when the jet reached the impingement region, and the distance between the stagnation point (SP) and the geometric center (GC) gradually increased, the flow angle φ along the jet centerline remained constant in the free-jet region and rapidly decreased in the impingement region. The impingement plate pressure distribution at various heights was similar, and the impinging pressure concentration on the upstream side of the maximum pressure point was higher.

show abstract

Section: Introductionmentioning

confidence: 99%

Flow Characteristics of Oblique Submerged Impinging Jet at Various Impinging Heights

Zhang

Wang

Liu³

et al. 2022

JMSE

Self Cite

View full text Add to dashboard Cite

show abstract

“…The flow characteristics of the impinging jet depend on the nozzle shape, the Reynolds number at the exit of the jet, the distance from the nozzle to the impingement plate, and the impinging angle (the angle between the center axis of the jet nozzle and the impingement plate), etc. In order to study the flow structure of impinging jet, domestic and foreign scholars have used hot wire anemometer, laser Doppler velocimeter, particle image velocimetry and other technologies for experimental research [1][2][3][4][5], and different turbulence models are also used for numerical calculation [6][7][8]. According to the impinging angle, the submerged water jet flow can be divided into vertical impinging jet (θ = 90 • ) and oblique impinging jet (0 • < θ < 90 • ).…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Normal Impinging Water Jet at Different Impinging Height, Based on Wray–Agarwal Turbulence Model

et al. 2020

Self Cite

View full text Add to dashboard Cite

As a kind of water jet technology with strong impinging force and simple structure, the submerged impinging water jet can produce strong scouring action on subaqueous sediments. In order to investigate the flow field characteristics and impinging pressure of submerged impinging water jets at different impinging heights, the Wray-Agarwal (W-A) turbulence model is used for calculation. The velocity distribution and flow field structure at different impinging heights (1 ≤ H/D ≤ 8), and the impinging pressure distribution at the impingement plate under different Reynolds numbers (11, 700 ≤ Re ≤ 35100) are studied. The results show that with the increase of the impinging height, the diffusion degree increases and the velocity decreases gradually when the jet reaches the impingement region. The fluid accelerates first and then decelerates near the stagnation point. The maximum impinging pressure and the impinging pressure coefficient decrease with the increase of the impinging height, but the effective impinging pressure range remains unchanged. In this paper, the distribution characteristics of the impinging pressure in the region of the impingement plate at different heights are clarified, which provides theoretical support for the prediction method of the impinging pressure.

show abstract

“…The parameters in his study considered jet Reynolds number from 9.5 × 10 4 to 22.4 × 10 4 ; nozzles to plate spacing of 3D to 12D; nozzle to nozzle spacing of 3D, 5D and 8D; and jet angles from 0 to 20 degrees. Wang et al [9] conducted an experimental investigation of a single water jet impingement at various impingement angles and Reynolds numbers. Taghinia et al [10] investigated twin-jet impingement numerically with Reynolds-Averaged Navier-Stokes (RANS) -Large Eddy Simulation (LES) hybrid turbulence model and showed that Shear Stress Transport (SST) -Scale Adaptive Simulation (SAS) model can produce more accurate predictions.…”

Section: Physical Modelmentioning

confidence: 99%

“…This part compares the results from numerical simulation using k-ε and WA turbulence models and experiment conducted by Wang et al [9]. A mesh independence of the solution study was conducted by performing the computations on coarse, medium and fine mesh.…”

Section: Validation With Experiments Of Single Jet Impingementmentioning

confidence: 99%

Numerical Simulation of Fountain Formation due to Normal and Inclined Twin-Jet Impingement on Ground

Zhang

Agarwal

2020

Fluids

View full text Add to dashboard Cite

The goal of this paper is to study numerically the flow physics of a fountain formed by twin-jet impingement on ground. The incompressible Reynolds-Averaged Navier-Stokes (RANS) equations with realizable k-ε and WA (Wray-Agarwal) turbulence model are employed in the numerical simulations with ANSYS Fluent. A series of numerical simulations for straight and inclined fountain formations are conducted by changing the geometric and flow parameters of twin jets and distance between them. The changes in parameters include variations in the jet Reynolds number from 2 × 104 to 8 × 104, impingement height, distance between the centerlines of the two jets from 1.4D to 16D where D is the jet diameter, and ratio of the Reynolds number of the two jets from 1 to 4. It is shown that different Reynolds numbers of the two jets can result in a fountain that inclines towards the jet with smaller Reynolds number. Detailed flow field simulations for a large number of cases are presented, and the flow physics of fountain formation is analyzed for the first time in the literature.

show abstract

Experimental investigation on impingement of a submerged circular water jet at varying impinging angles and Reynolds numbers

Cited by 37 publications

References 26 publications

Flow Characteristics of Oblique Submerged Impinging Jet at Various Impinging Heights

Flow Characteristics of Oblique Submerged Impinging Jet at Various Impinging Heights

Numerical Study of the Normal Impinging Water Jet at Different Impinging Height, Based on Wray–Agarwal Turbulence Model

Numerical Simulation of Fountain Formation due to Normal and Inclined Twin-Jet Impingement on Ground

Contact Info

Product

Resources

About