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Journal of Projectiles, Rockets, Missiles and Guidance >

2021 , Vol. 41 >Issue 1: 8 - 12

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2021.01.002

Numerical Simulation of the Effect of Nozzle Structure on Internal Flow Field in an Anti-riot Pipe

  • ZHAO Fadong 1 ,
  • ZHANG Yanli 2 ,
  • ZHUANG Hongwei 1 ,
  • WU Yidan 1
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  • 1 College of Equipment Management and Support,Engineering University of PAP,Xi’an 710086, China
  • 2 Base Department, Engineering University of PAP,Xi’an 710086, China

Received date: 2020-02-12

  Online published: 2025-02-11

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Abstract

To analyze the influence of nozzle structure on internal flow field in a anti-riot pipe, the large eddy simulation of the percussion flow process is carried out by using moving grid technology. The results show that the energy loss is mainly caused by the change of nozzle structure and the pressure difference. The smaller the contraction anglecontraction angles of the cone straight nozzle, the smaller the eddy loss, the faster the average outlet velocity, the higher the energy utilization ratio. Under the condition that the total length of the nozzle and the length of the inlet contraction section remain the same, the energy loss of the equalspeed change nozzle is the lowest, its velocity and pressure distribution is the most uniform and the outlet average velocity is the highest, and the performance is the best. The conclusion could provide guidance for nozzle structure optimization.

Key words： anti-riot pipe; percussion flow; impulse jet; nozzle structure

Cite this article

ZHAO Fadong , ZHANG Yanli , ZHUANG Hongwei , WU Yidan . Numerical Simulation of the Effect of Nozzle Structure on Internal Flow Field in an Anti-riot Pipe[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2021 , 41(1) : 8 -12 . DOI: 10.15892/j.cnki.djzdxb.2021.01.002

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