Review of jet impingement in high-energy piping systems

Kong, Ran; Kim, Seung-Jin; Ishii, Mamoru

doi:10.1016/j.nucengdes.2019.110411

Cited by 9 publications

(1 citation statement)

References 23 publications

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“…During the instantaneous process of the under-expanded CO2 jet, high-energy gas and a shockwave are generated to impact the rock. Considering the under-expanded jet from the high-pressure vessel, the first significant load on the wall would be induced by the blasting shockwave [10]. Jaimes et al experimentally determined that a transient pressure pulse, similar to the typical explosive shockwave, was formed in the process of CO2 blasting [11].…”

Section: Introductionmentioning

confidence: 99%

On the Factors of Impact Pressure in Supercritical CO2 Phase-Transition Blasting—A Numerical Study

Liu

2022

Energies

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Carbon dioxide phase transition blasting (CO2-PB) technology is an effective and economical technology used for breaking rocks. The use of CO2-PB can significantly reduce the vibration damage to surrounding rocks. There is little research on the shockwave generated by the CO2-PB, and simulation can better show the flow field characteristics. In order to clarify the mechanism of its blasting load process, a theoretical analysis and a numerical model were developed to study the flow-field characteristics and the impact pressure of CO2-PB. Our results show that the CO2 absorbs heat from the surrounding environment, producing a significant low-temperature area. The overpressure is significantly lower than the driving gas pressure to the ambient pressure, limiting the maximum over-pressure that can be obtained. When the pressure in CO2-PB reaches 100 MPa, the shockwave is about 4.25 MPa. As the distance increases, the peak value of the shockwave decays rapidly. As the dimensionless distance increases from 1 to 5, the dimensionless overpressure decreases from 1 to 0.23. Under the same blasting pressure, increasing the filling pressure and increasing the filling volume slightly reduce the initial pressure of the shockwave. In the shock stage, strong compression is formed on the surface of the shockwave, resulting in a higher peak pressure value. Meanwhile, the stable pressure is influenced by the target distance, blasting pressure, and CO2-PB length.

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Section: Introductionmentioning

confidence: 99%