Influence of structural parameters of self-excited nozzle on oscillation effect of pulse jet

作     者：Li, Hongsheng Liu, Songyong Jiang, Hongxiang Ji, Huifu Zhang, Deyi Sun, Dunkai Guo, Chuwen 

作者机构：China Univ Min & Technol Sch Mechatron Engn Xuzhou 221116 Peoples R China China Univ Min & Technol Jiangsu Prov & Educ Minist Cosponsored Collaborat Xuzhou 221008 Peoples R China Henan Agr Univ Coll Tobacco Sci Zhengzhou 450008 Peoples R China Suzhou Univ Sci & Technol Sch Mech Engn Suzhou 215009 Peoples R China 

出 版 物：《JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING》 (J. Braz. Soc. Mech. Sci. Eng.)

年 卷 期：2023年第45卷第4期

页      面：1-14页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 

基　　金：National Natural Science Foundation of China Natural Science Foundation of Jiangsu Province Key Research and Development Program of Xuzhou [KC21106] Science and Technology Project in Henan Province Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) 

主　　题：Self-excited nozzle Pulse jet Nonlinear mathematical model Average velocity Oscillation effect 

摘      要：To design a self-excited oscillation pulse jet (SOPJ) nozzle with excellent performance and improve the rock breaking efficiency of hard rock roadway, the nonlinear mathematical model of SOPJ is firstly established, and the relationship between jet pressure versus time and pressure gradient with different control parameters beta of self-excited oscillation system is studied. In addition, the internal and external flow fields with different system pressure p, cavity length L-c, cavity diameter D-c and cone angle alpha(c) are studied by numerical simulation to obtain its influence on the oscillation effect of the SOPJ. The results show that the average velocity of SOPJ and continuous jet all shows a power function, but the velocity of SOPJ is lower than that of continuous jet due to the internal energy consumption. The average velocity and variance of the SOPJ are considered as the evaluation criteria for the oscillation effect, the pulse jet presents better oscillation effect with the cavity length, and the cavity diameter and the section cone angle are selected as 80 mm, 30 mm and 160 degrees, respectively, which can provide the basis for the design of self-excited oscillation nozzle and application of pulse jet technology in hard rock roadway driving.