CFD Simulation to the Flow Field of Venturi Injector

Huang, Xingfa; Li, Guangyong; Miao, Wang

doi:10.1007/978-1-4419-0211-5_3

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…Many studies have shown that throat diameter has a significant effect on the fertilizer injection performance of the Venturi injector. Huang et al (2009) and Sun et al (2012) indicated that throat diameter was positively correlated with water inlet flow and fertilizer injection amount, and similar conclusions were also drawn in this study (Figure 6c). With increased throat diameter, the fertilizer injection efficiency first increased and then decreased.…”

Section: Discussionsupporting

confidence: 90%

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

Hu,

Guan,

et al. 2023

Irrigation and Drainage

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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.

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Section: Discussionsupporting

confidence: 90%

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

Hu,

Guan,

et al. 2023

Irrigation and Drainage

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“…Other studies have mainly focused on the flow inside venturi injectors. Huang et al [29,30] numerically analyzed the influence of the structural parameters on the absorption capacity. Yan et al [31] used a high-speed video camera to investigate the development of the cavitation inside a venturi injector.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on the Internal Flow of the Venturi Injector

Huang

et al. 2020

Processes

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To study the appropriate numerical simulation methods for venturi injectors, including the investigation of the hydraulic performance, mixing process, and the flowing law of the two internal fluids, simulations and experiments were conducted in this study. In the simulations part, the cavitation model based on the standard k–ε turbulence and mixture models was added, after convergence of the calculations. The results revealed that the cavitation model has good agreement with the experiment. However, huge deviations occurred between the experimental results and the ones from the calculation when not considering the cavitation model after cavitation. Thus, it is inferred that the cavitation model can exactly predict the hydraulic performance of a venturi injector. In addition, the cavitation is a crucial factor affecting the hydraulic performance of a venturi injector. The cavitation can ensure the stability of the fertilizer absorption of the venturi injector and can realize the precise control of fertilization by the venturi injector, although it affects the flow stability and causes energy loss. Moreover, this study found that the mixing chamber and throat are the main areas of energy loss. Furthermore, we observed that the internal flow of the venturi injector results in the majority of mixing taking place at the diffusion and outlet sections.

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“…It is a simple structure without mobile pieces, convenient to operate and does not require external energy for operation. 8 The injectors can be manufactured for specific size and material requirements and the suction flow rates in this experiment are controlled based on the saline flow rate. The main benefit of using this Venturi system for the application of CPB is that the suctioned blood is introduced into fluid-filled tubing, reducing the air-to-blood interface.…”

Section: Introductionmentioning

confidence: 99%