Numerical study of mixing of cavitating flows in a Venturi tube

Shi, Hang; Liu, Qingxia; Nikrityuk, Petr A.

doi:10.1002/cjce.23898

Cited by 11 publications

(3 citation statements)

References 32 publications

(48 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The interior design of the nozzle was similar to a venturi, and many hard and sharp crushing needles were placed on the crushing device. The local pressure in this system fell to the value of the vapor pressure of the liquid medium as the fluid passed through the throat of the micronano bubbles system [21]. This droves the growth of micro-nano cavitation nuclei in the liquid [22].…”

Section: Experimental Apparatusmentioning

confidence: 92%

Oxidative decomposition of butyl acetate by micro-nano bubbles at room temperature

Hu¹,

Hao²,

Wei³

et al. 2022

ScienceAsia

View full text Add to dashboard Cite

In this work, the degradation of low-concentration butyl acetate was performed in a micro-nano bubble device via the cavitation effect. The degradation efficiency of this process was investigated for different butyl acetate concentrations. The experimental results showed that with a butyl acetate concentration of 186.5 mg/m 3 , the degradation efficiency of butyl acetate was 77.6%. Gas chromatography-mass spectrometry was used to identify the intermediate products generated during different treatment periods under varying initial concentrations. Based on the product analysis, the degradation reaction and pathway were speculated. All the results showed that the major reaction pathway of butyl acetate degradation was the initial production of low-carbon ester, which was then decomposed into butyl alcohol and acetone compounds. This study provides a deeper understanding of the degradation of butyl acetate by micro-nano bubbles and the mechanism of degradation.

show abstract

Section: Experimental Apparatusmentioning

confidence: 92%

Oxidative decomposition of butyl acetate by micro-nano bubbles at room temperature

Hu¹,

Hao²,

Wei³

et al. 2022

ScienceAsia

View full text Add to dashboard Cite

show abstract

“…A typical effect sought in the use of Venturi injectors is the generation of vacuum, but at a certain point the depression can produce cavitation, and given the importance of this effect, Shi et al and Bermejo et al [12,13] studied how this cavitation affects and its possible uses. One of these uses is fluid mixing; thus, Shi and Nikrityuk [14,15] studied how this cavitation affects the mixing process.…”

Section: Introductionmentioning

confidence: 99%

Venturi Injector Optimization for Precise Powder Transport for Directed Energy Deposition Manufacturing Using the Discrete Element Method and Genetic Algorithms

García-Montagut,

Paz,

Monzón

et al. 2024

Materials

View full text Add to dashboard Cite

Additive manufacturing technologies such as directed energy deposition use powder as their raw material, and it must be deposited in a precise and controlled manner. Venturi injectors could be a solution for the highly precise transport of particulate material. They have been studied from different perspectives, but they are always under high-pressure conditions and mostly fed by gravity. In the present study, an optimization of the different dimensional parameters needed for the manufacturing of a Venturi injector in relation to a particle has been carried out to maximize the amount of powder capable of being sucked and transported for a specific flow in a low-pressure system with high precision in transport. For this optimization, simulations of Venturi usage were performed using the discrete element method, generating different variations proposed by a genetic algorithm based on a preliminary design of experiments. Statistical analysis was also performed to determine the most influential design variables on the objective, with these being the suction diameter (D3), the throat diameter (d2), and the nozzle diameter (d1). The optimal dimensional relationships were as follows: a D3 34 times the particle diameter, a d2 26.5 times the particle diameter, a d1 40% the d2, a contraction angle alpha of 18.73°, and an expansion angle beta of 8.28°. With these proportions, an 85% improvement in powder suction compared to the initial attempts was achieved, with a maximum 2% loss of load.

show abstract

“…Tukimin et al (2016) visualized the internal flow field of the Venturi injector and reported that its lowest internal pressure appeared in the throat by Fluent software. When the Venturi injector worked at low inlet pressure, the sensitivity of the injection rate to the pressure difference was highest (Shi et al, 2021). Simultaneously, Shi et al (2019) held that the water–fertilizer mixing area was mainly the diffusion section.…”

Section: Introductionmentioning

confidence: 99%

Structure optimization and fertilizer injection performance analysis of a non‐axisymmetric Venturi injector

Hu,

Guan,

et al. 2023

Irrigation and Drainage

View full text Add to dashboard Cite

To improve the fertilizer injection performance of a non‐axisymmetric Venturi injector (NAVI), the effects of the contraction angle, diffusion angle, throat diameter and tilt angle of the injection pipe on the fertilizer injection performance of NAVI were examined. Based on the test, the original NAVI was optimized, and the fertilizer injection performance of NAVI before (F1) and after (F2) optimization was compared. Then, a non‐axisymmetric Venturi injector with arc diffusion (F3) was proposed. The results showed that when the water inlet diameter of the non‐axisymmetric Venturi injector was 25 mm, the optimal structural parameters were as follows: the contraction angle was 40°, the diffusion angle 6°, the throat diameter 7 mm and the tilt angle of the injection pipe was 120°. Compared with F1, the injection rate and fertilizer injection efficiency of F2 increased by 21–66 and 27–79%, respectively. Changing the diffusion section of NAVI into an arc structure was conducive to reducing the vortex area size by 11% and improving the injection rate by 20–62%. The results can provide an important reference for the structural design of Venturi injectors.

show abstract

Numerical study of mixing of cavitating flows in a Venturi tube

Cited by 11 publications

References 32 publications

Oxidative decomposition of butyl acetate by micro-nano bubbles at room temperature

Oxidative decomposition of butyl acetate by micro-nano bubbles at room temperature

Venturi Injector Optimization for Precise Powder Transport for Directed Energy Deposition Manufacturing Using the Discrete Element Method and Genetic Algorithms

Structure optimization and fertilizer injection performance analysis of a non‐axisymmetric Venturi injector

Contact Info

Product

Resources

About