Influence of high pressure pulsating fluid on seal of pipeline fittings based on multi-scale model

Li, Xin; Yan, Yangyang

doi:10.1016/j.ijpvp.2020.104300

Cited by 1 publication

(2 citation statements)

References 6 publications

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“…In contrast, when studying the flow of pulsating fluid in pipelines, scholars have focused on the influence of pulsating fluid on the vibration characteristics 20–22 and sealing performance 23 of the pipeline, the effect of temperature on the pulsation characteristics of the pipeline, 24 and the hydraulic pulsation attenuator 19 . However, few researchers have considered the effect of the pipes on fluid flow.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, AMESim software is utilized to establish a simplified model of the sevenplunger hydraulic pump, and the pump source fluid pressure pulsation characteristics of different system load pressures at a constant speed are simulated and analyzed. 19 In contrast, when studying the flow of pulsating fluid in pipelines, scholars have focused on the influence of pulsating fluid on the vibration characteristics [20][21][22] and sealing performance 23 of the pipeline, the effect of temperature on the pulsation characteristics of the pipeline, 24 and the hydraulic pulsation attenuator. 19 However, few researchers have considered the effect of the pipes on fluid flow.…”

Section: Introductionmentioning

confidence: 99%

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Effects of pulsating fluid at nozzle inlet on the output characteristics of common and self‐excited oscillation nozzle

Feng

Wang

Kong

2022

Energy Science & Engineering

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High-speed water jets are key technologies for increased production efficiency in oil drilling, and high-speed self-excited oscillating pulsed water jets (SEOPWs) offer many advantages compared to continuous jets for most industrial applications. Therefore, many studies have focused on this topic.However, the current studies on hydraulic pulsed jets have rarely extended to integrated modeling of the high-speed water jet transmission process. To better apply the SEOPWs, based on fluid mechanics, the theoretical model of the plunger pump-pipeline-nozzle is established, and the sensitivity of different nozzles on the pulsating fluid is studied in the time domain.Furthermore, the vibration characteristics of the nozzle are further investigated in the frequency domain. The results show that the common nozzle has an enlarged role in the pressure amplitude, the Helmholtz nozzle enlarges the pressure peak and amplitude, and the amplification is more obvious with the speedy growth on the plunger pump. However, as the pipeline becomes longer, the difference between the pressure of the inlet and outlet does not change. Therefore, the nozzle is more sensitive to the change in the plunger pump speed. In the frequency domain, the secondary frequency peak for the Helmholtz nozzle is 1.26 times larger than the interference frequency, while it is 1.08 times for the common nozzle. Helmholtz nozzles tend to produce stronger natural vibrations than common nozzles. By comparing the impact force, the experimental results show good agreement with the simulated results. The study provides a theoretical basis for water jet-assisted drilling in deep wells and lays the foundation for the better application of self-oscillating impact drilling tools.

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