Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet Nozzle

The self-excited oscillating cavitation jet nozzle (SEOCJN) serves as a crucial component for converting hydrostatic energy into dynamic pressure energy and ensuring optimal hydraulic and cavitation performance of cavitating jets. Thus, it is of crucial significance to understand the cavitation char...

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Main Authors: Y. Zhao, G. Li, F. Zhao, X. Wang, W. Xu
Format: Article
Language:English
Published: Isfahan University of Technology 2023-09-01
Series:Journal of Applied Fluid Mechanics
Subjects:
Online Access:https://www.jafmonline.net/article_2292_de8d29622003ed85cb32cbf29508e632.pdf
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author Y. Zhao
G. Li
F. Zhao
X. Wang
W. Xu
author_facet Y. Zhao
G. Li
F. Zhao
X. Wang
W. Xu
author_sort Y. Zhao
collection DOAJ
description The self-excited oscillating cavitation jet nozzle (SEOCJN) serves as a crucial component for converting hydrostatic energy into dynamic pressure energy and ensuring optimal hydraulic and cavitation performance of cavitating jets. Thus, it is of crucial significance to understand the cavitation characteristics and the influence law of SEOCJN for its extensive industrial applications. This paper utilizes numerical simulation methods to analyze the dynamic process of cavitation initiation, development, and outlet cavitation performance of SEOCJN. It explores the effects of inlet pressure and flow rate on the frequency characteristics of SEOCJN, and establishes a mathematical relationship between self-excited oscillation frequency and outlet flow frequency. The results indicate that the self-excited oscillation nozzle has an inlet diameter (D1) of 4.7 mm, an outlet diameter (D2) of 12.2 mm, a length (L) of 52 mm, a chamber diameter (D) of 83 mm, an oscillation angle of 120°, and an inlet pressure (Pin) of 4.8 MPa. At these parameters, the frequency of the pulse jet reaches 830.01 Hz, with an internal flow period of approximately 0.0024 s. The maximum vapor volume fraction is found to be located 0.28 m from the outlet of the SEOCJN. Furthermore, the frequency of self-excited oscillation pulse increases with an increase in inlet pressure. These findings provide a theoretical basis for the industrial application of self-excited oscillation cavitation jet nozzles.
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spelling doaj.art-0ab81089091f40978bb1d1e3a9b251e32023-09-04T05:52:07ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35721735-36452023-09-0116112130214110.47176/jafm.16.11.19232292Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet NozzleY. Zhao0G. Li1F. Zhao2X. Wang3W. Xu4School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang, 212013, ChinaGongQing Institute of Science and Technology, Gongqingcheng Shi, Jiangxi 332020, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, Jiangsu Province, ChinaResearch Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, Jiangsu Province, ChinaSchool of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, ChinaThe self-excited oscillating cavitation jet nozzle (SEOCJN) serves as a crucial component for converting hydrostatic energy into dynamic pressure energy and ensuring optimal hydraulic and cavitation performance of cavitating jets. Thus, it is of crucial significance to understand the cavitation characteristics and the influence law of SEOCJN for its extensive industrial applications. This paper utilizes numerical simulation methods to analyze the dynamic process of cavitation initiation, development, and outlet cavitation performance of SEOCJN. It explores the effects of inlet pressure and flow rate on the frequency characteristics of SEOCJN, and establishes a mathematical relationship between self-excited oscillation frequency and outlet flow frequency. The results indicate that the self-excited oscillation nozzle has an inlet diameter (D1) of 4.7 mm, an outlet diameter (D2) of 12.2 mm, a length (L) of 52 mm, a chamber diameter (D) of 83 mm, an oscillation angle of 120°, and an inlet pressure (Pin) of 4.8 MPa. At these parameters, the frequency of the pulse jet reaches 830.01 Hz, with an internal flow period of approximately 0.0024 s. The maximum vapor volume fraction is found to be located 0.28 m from the outlet of the SEOCJN. Furthermore, the frequency of self-excited oscillation pulse increases with an increase in inlet pressure. These findings provide a theoretical basis for the industrial application of self-excited oscillation cavitation jet nozzles.https://www.jafmonline.net/article_2292_de8d29622003ed85cb32cbf29508e632.pdfself-excited oscillatingcavitation jetinlet pressureflowself-excitation frequency
spellingShingle Y. Zhao
G. Li
F. Zhao
X. Wang
W. Xu
Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet Nozzle
Journal of Applied Fluid Mechanics
self-excited oscillating
cavitation jet
inlet pressure
flow
self-excitation frequency
title Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet Nozzle
title_full Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet Nozzle
title_fullStr Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet Nozzle
title_full_unstemmed Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet Nozzle
title_short Analysis of Macroscopic Cavitation Characteristics of a Self-Excited Oscillating Cavitation Jet Nozzle
title_sort analysis of macroscopic cavitation characteristics of a self excited oscillating cavitation jet nozzle
topic self-excited oscillating
cavitation jet
inlet pressure
flow
self-excitation frequency
url https://www.jafmonline.net/article_2292_de8d29622003ed85cb32cbf29508e632.pdf
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