Pulse supercharging phenomena in a water-filled pipe and a universal prediction model of optimal pulse frequency

Li, Heng; Huang, Bingxiang

doi:10.1063/5.0122232

Cited by 11 publications

(8 citation statements)

References 40 publications

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“…Although many previous researches [8][9][10][11] reported the supercharging phenomena, the related water pressure is intermittent constant even attenuated during the supercharging process, causing the limited magnification of pressure. By contrast, we find that there is intermittent increase of pressure if applying certain frequency, giving rise to a remarkable supercharging phenomenon different from the previous findings 12 .…”

contrasting

confidence: 99%

“…1.). The detailed introduction for the validation can be found in Reference 12 , including the simulated region, resolution condition, etc. For the PSP simulation, it is vital to assign the boundary conditions.…”

Section: Methodsmentioning

confidence: 99%

“…The main reason may be attribute to the injection way at the pipe inlet, including the injected wave shape, amplitude and frequency, etc. In our recent research 12 , we used the computational fluid dynamic (CFD) method and statistic method find the optimal injection frequency. However, we only focus on the square wave or sine wave in past study.…”

Section: Introductionmentioning

confidence: 99%

“…The second is the internal wave in a constrained space such as the pressure wave in water-filled pipe [4][5][6] . The propagation phenomenon of the pressure wave inside a water-filled pipe often appears in engineering such as the water hammer phenomenon 7,8 and pulse (or pulsating) hydraulic fracturing (PHF) process [9][10][11][12] .…”

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confidence: 99%

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Pulse and pulsating supercharging phenomena in a semi-enclosed pipe

Wang

2023

Sci Rep

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Considering the discontinuous square pulse wave and continuous sine pulsating wave, we report a distinctive supercharging phenomenon of fluid in a water-filled semi-enclosed pipe and reveal the supercharging regularity. We demonstrate that there can be significant supercharging phenomena at the pipe end-face if the water is periodically injected at the pipe inlet with certain frequency. Compared to the traditional pulsating injection method, the present injection strategy can remarkably enhance the peak pressure of the water at the end face of the pipe. We explained this phenomenon by numerical simulations based on the computational fluid dynamic method. It’s found that there is a quantitative relationship between the optimal pulse frequency, pipe length and wave speed. The proposed frequency model is suitable for the multi-waveform, such as sine wave, square wave and arcuate wave. The fluid pressure at the pipe end-face intermittently increases and the end-face peak pressure is largest when the inlet injection frequency equals to the optimal frequency.

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confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Pulse and pulsating supercharging phenomena in a semi-enclosed pipe

Wang

2023

Sci Rep

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“…These methods include the upwind scheme and MacCormack (MAC) method, etc. [2][3][4][5][6][7]. Most of these methods are based on the idea of explicit scheme.…”

Section: Introductionmentioning

confidence: 99%

Flux Vector Splitting Method of Weakly Compressible Water Navier-Stokes Equation and Its Application

Li,

Huang

2023

Water

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Water is a weakly compressible fluid medium. Due to its low compressibility, it is usually assumed that water is an incompressible fluid. However, if there are high-pressure pulse waves in water, the compressibility of the water medium needs to be considered. Typical engineering applications include water hammer protection and pulse fracturing, both of which involve the problem of discontinuous pulse waves. Traditional calculation and simulation often use first-order or second-order precision finite difference methods, such as the MacCormark method. However, these methods have serious numerical dissipation or numerical dispersion, which hinders the accurate evaluation of the pulse peak pressure. In view of this, starting from the weakly compressible Navier–Stokes (N-S) equation, this paper establishes the control equations in the form of flux, derives the expressions of eigenvalues, eigenvectors, and flux vectors, and gives a new flux vector splitting (FVS) formula by considering the water equation of state. On this basis, the above flux vector formula is solved using the fifth-order weighted essentially non-oscillatory (WENO) method. Finally, the proposed FVS formula is verified by combining the typical engineering examples of water hammer and pulse fracturing. Compared with the traditional methods, it is proved that the FVS formula proposed in this paper is reliable and robust. As far as we know, the original work in this paper extends the flux vector splitting method commonly used in aerodynamics to hydrodynamics, and the developed model equation and method are expected to play a positive role in the simulation field of water hammer protection, pulse fracturing, and underwater explosion.

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Experimental research on the reflection and response characteristics of pressure pulse waves for different gas pipeline blockage materials

Liang,

Ma,

Yan

et al. 2024

Energy Science & Engineering

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Natural gas pipelines are exposed to complex production and transportation environments, leading to blockages of varying compositions and forms due to various factors. This paper proposes a pressure pulsing wave‐based pipe blockage detection method, and a series of pipeline blockage detection experiments of different materials are carried out, including hydrate blockage, ice blockage, paraffin blockage, and water blockage. Through the blockage detection calculation theory and the reflection and transmission characteristics during pressure wave emission, the blockage position, length, and section blockage rate under different blockage materials are obtained, and the influence of different blockage materials on the reflection and transmission signal characteristics of the pressure pulse wave is analyzed. The results show that the solid blocking material does not noticeably impact the reflectivity and reflective properties of pressure waves, and different cross‐sectional shapes have a noticeable impact on the reflectivity of the pressure wave. The reflected wave waveform of the liquid blockage material is visible but irregular. The average error of blockage location is 0.78%.

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Pulse supercharging phenomena in a water-filled pipe and a universal prediction model of optimal pulse frequency

Cited by 11 publications

References 40 publications

Pulse and pulsating supercharging phenomena in a semi-enclosed pipe

Pulse and pulsating supercharging phenomena in a semi-enclosed pipe

Flux Vector Splitting Method of Weakly Compressible Water Navier-Stokes Equation and Its Application

Experimental research on the reflection and response characteristics of pressure pulse waves for different gas pipeline blockage materials

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