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Methodology and performance of annular fluid enhanced self-excited oscillation in pulsed submerged waterjet for coal mine engineering.
- Source :
-
Powder Technology . Feb2024, Vol. 435, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Submerged waterjets often yield low coal-breaking efficiency and have limited permeability. This study introduced a novel approach to enhance submerged waterjets by harnessing the annular fluid hydraulic energy of a borehole. A new waterjet modulator was developed using large eddy simulation (LES) combined with the response surface method (RSM). The reliability of the method was verified by submerged waterjet high-frequency pulsation pressure test experiments. The results indicated that the pulsation amplitude of the annular fluid enhanced self-excited oscillation pulsed waterjet (AFESOPW) was 330.05%, 45.17%, and 32.56% higher than those of the continuous waterjet, self-excited oscillation pulsed waterjet (SOPW), and pre-optimized waterjet, respectively. Additionally, the pulsating pressure peak increased by 42.84%, 19.60%, and 25.81%, respectively. Under the submerged condition, the outlet pulsating pressure peak of the AFESOPW was 1.32–1.58 times the inlet pressure. The self-priming annular fluid weakened the hinderance of the submerged environmental pressure and enhanced the waterjet pulsation effect. [Display omitted] • A novel approach to enhance the submerged waterjet was proposed. • The mechanism of self-priming pressurization was revealed. • A new waterjet modulator optimization method was formed. • A new submerged waterjet pulsating pressure test system was developed. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00325910
- Volume :
- 435
- Database :
- Academic Search Index
- Journal :
- Powder Technology
- Publication Type :
- Academic Journal
- Accession number :
- 175243406
- Full Text :
- https://doi.org/10.1016/j.powtec.2024.119401