Pressures Resulting from Changes of Velocity of Water in Pipes

Frizell, Joseph P.

doi:10.1061/taceat.0001315

Cited by 18 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The velocity of a hydraulic pressure wave confined in an elastic pipe is different, usually much lower, from that in unconfined water. This difference was first described by Frizell [29] and can be deducted from equation (A3), in which the velocity of the hydraulic pressure wave (v [m/s]) in a thin-walled cylindrical pipe is calculated [16]. From equation (A3) it can be seen that the wave velocity v can be increased by increasing ρ and K of the fluid or E and e of the shaft [30].…”

Section: Additional Information Competing Financial Interest Statementmentioning

confidence: 95%

Crossing Total Occlusions using a hydraulic pressure wave: a feasibility study

Sakes¹,

Nicolai²,

Karapanagiotis³

et al. 2018

Biomed. Phys. Eng. Express

View full text Add to dashboard Cite

Crossing highly calcified occlusions is technically challenging mainly due to guidewire buckling. In an effort to prevent buckling, a catheter that uses a dynamic impulse load is proposed. The proposed Wave catheter consists of an input plunger to generate an impulse at the handle, a hydraulic pressure wave confined within a Ø2 mm catheter to transfer the impulse towards the tip, and an output plunger to transfer the impulse to the occlusion. To determine the feasibility of this catheter, an experiment was performed in which the input and output impulses were recorded as a function of the catheter type, curvature, and plunger travel distance. Additionally, the system was tested on artificial CTO models to determine the clinical validity. The catheter has illustrated the ability to safely transfer high-force impulses of up to 43N (1.5 N required) with only minimum catheter type and no curvature dependency, allowing for delivering high-force impulses through tortuous vasculature and under any angle. Furthermore, the catheter was able to penetrate the artificial CTO models within 1 strike.

show abstract

Section: Additional Information Competing Financial Interest Statementmentioning

confidence: 95%

Crossing Total Occlusions using a hydraulic pressure wave: a feasibility study

Sakes¹,

Nicolai²,

Karapanagiotis³

et al. 2018

Biomed. Phys. Eng. Express

View full text Add to dashboard Cite

show abstract

“…Gave a direct water hammer pressure calculation formula, the formula is known as the "basic equation of water hammer". In the same year, the American engineer Frizell gave the equation of water hammer pressure about wave speed and flow velocity change [7].…”

Section: The Development Of Transient Running Water Strike Theorymentioning

confidence: 99%

Status of Research on Water Hammer Effect in Long Distance Pressure Pipelines

Rongyu²,

Wang³

et al. 2022

JERR

View full text Add to dashboard Cite

In the long distance pressure pipeline, the sudden change of instantaneous pressure caused by the rapid change of liquid velocity is called water hammer, which seriously threatens the safe operation of hydropower station. In this paper, the development and calculation methods of transient flow percussion theory are introduced, and different models and numerical methods are analyzed and compared. Finally, the problems in transient flow research and water hammer prevention measures are summarized, which is helpful to reduce the occurrence of water hammer accidents and guarantee the normal and stable operation of water supply pipeline system. This conclusion can provide reference for water hammer protection of long distance water supply system.

show abstract

Basic Concepts

Chaudhry¹

2014

Applied Hydraulic Transients

View full text Add to dashboard Cite

Pressures Resulting from Changes of Velocity of Water in Pipes

Cited by 18 publications

References 0 publications

Crossing Total Occlusions using a hydraulic pressure wave: a feasibility study

Crossing Total Occlusions using a hydraulic pressure wave: a feasibility study

Status of Research on Water Hammer Effect in Long Distance Pressure Pipelines

Basic Concepts

Contact Info

Product

Resources

About