Study on the impacting performance of a self-excited oscillation pulsed jet nozzle

2021 ◽  
pp. 109120
Author(s):  
Abulimiti Aibaibu ◽  
Chao Zheng ◽  
Yonghong Liu ◽  
Huiwen Pang ◽  
Dexin Pang ◽  
...  
Keyword(s):  
Pulsed Jet ◽  
Excited Oscillation ◽  
Jet Nozzle

Oscillation Mechanism Analysis and Numerical Simulation for Tandem Self-Excited Oscillation Pulsed Jet Nozzle

2013 ◽  
Vol 448-453 ◽  
pp. 3449-3453 ◽  
Author(s):  
Qin Li ◽  
Wei Sha ◽  
Fu Bao Li ◽  
Shu Yi Xiao
Keyword(s):  
Numerical Simulation ◽  
Flow Field ◽  
Helmholtz Resonator ◽  
Mechanism Analysis ◽  
Pulsed Jet ◽  
Oscillation Mechanism ◽  
Excited Oscillation ◽  
New Ideas ◽  
Jet Nozzle ◽  
Organ Pipe

Self-excited oscillation pulsed jet is the new jet which is superior to the traditional continuous jet. In view of the insufficiency of the widely used organ pipe and Helmholtz resonator at present, firstly, with the actual needs of production as the background, a tandem Self-excited oscillation pulsed jet nozzles is presented in this paper. Then on the basis of previous studies, some new ideas are put forward after the cavity Self-excited oscillation mechanism is analyzed theoretically. Finally, numerical simulation of the nozzle flow field is carried out using FLUENT, then ideal pressure distribution contours and the streamline of the flow field are got, verifying the analysis of the oscillation mechanism.

Erosion Experiment of Self-Excited Oscillation Pulsed Jet

2014 ◽  
Vol 937 ◽  
pp. 614-619
Author(s):  
Chuan Lin Tang ◽  
Jie Pei ◽  
Dong Hu ◽  
Xiao Ting He
Keyword(s):  
Significant Influence ◽  
Cavity Length ◽  
Experimental Studies ◽  
The Self ◽  
Erosion Depth ◽  
Pulsed Jet ◽  
Excited Oscillation ◽  
Erosion Effect ◽  
Erosion Volume ◽  
Peak Value

In order to improve the erosion effect of jet under submergence condition, experimental studies of erosion generated from the self-excited pulsed jet was carried out by using developed self-excited oscillation nozzle. The erosion volume and depth of pulsed jet were measured and taking mortar block as an erosion part. The results were that the standoff has significant influence on erosion effect. The erosion volume firstly decreases with increases in cavity length and then increases to a peak value. Erosion volume of pulsed jet is significantly higher than that of continuous jet, the erosion depth of two jet has slight difference.

Experimental Study on Dynamic Characteristics of Self-Excited Oscillation Pulsed Jet

2014 ◽  
Vol 937 ◽  
pp. 624-631 ◽  
Author(s):  
Chuan Lin Tang ◽  
Jie Pei ◽  
Dong Hu
Keyword(s):  
Dynamic Characteristics ◽  
Cavity Length ◽  
Variable Cross Section ◽  
Variable Cross ◽  
Pulsed Jet ◽  
Jet Impact ◽  
Result Show ◽  
Excited Oscillation ◽  
Pump Pressure ◽  
Submerged Conditions

The dynamic characteristics of the self-excited oscillation pulsed jet is tested by using pulsed jet impact variable cross-section beam in submerged conditions and make comparison with continuous jet, analyzing the effects of operating parameters and nozzle structure parameters on the dynamic characteristics of the pulsed jet. The result show that the oscillating frequency of jet decreases with the increase of cavity length while increases with the increase of the pump pressure. The energy of pulsed jet has obvious change with different cavity length.

An Experimental Study of the Nanoparticle Colloid Hydrodynamic Cavitation Jet Polishing Performance under Different Nozzle Designs

2011 ◽  
Vol 325 ◽  
pp. 633-637 ◽  
Author(s):  
Xing Wang ◽  
Fei Hu Zhang ◽  
Yong Zhang ◽  
Ming Zhou
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Hydrodynamic Cavitation ◽  
Pulsed Jet ◽  
Cavitation Effect ◽  
Swirling Jet ◽  
Shaped Nozzle ◽  
Jet Nozzle ◽  
Nanoparticle Colloid

Nanoparticle colloid hydrodynamic cavitation jet polishing (HCJP) is a super-smooth machining technology. This technology utilizes the interface reaction to remove material from the workpiece and uses cavitation effect to improve the processing efficiency. In this paper, the prototype equipment of HCJP is researched. Based on the prototype equipment, the processing experiments of pulsed jet nozzle, swirling jet nozzle and common cone-shaped nozzle have been done and the results of the experiments are compared with each other. The experiment results indicate that the roughness of the surfaces polished by three nozzles has remarkably decreased. The material removal rate of pulsed jet nozzle is the highest among the three types of nozzles. The material removal rate of the swirling jet nozzle is not improved obviously compared with the common cone-shaped nozzle. The processing experiment of monocrystalline silicon by the pulsed jet nozzle has been done and the roughness of processed surface is Ra 0.475 nm.

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