The concept of creating a pulse water gun with a large action range

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.139877

Keywords:

pulse water gun, stability of a jet, developed turbulence, small-scale turbulence.

Abstract

We presented the concept of creation of a pneumatic pulse water gun. Its original feature is a use of a developed turbulent flow at the attenuation stage for formation of a jet. We suppose to create the required structure of small-scale turbulence according to a known procedure by means of a lattice in a barrel channel. The maximum intensity of this turbulence will be at a certain distance from a lattice, where a nozzle must be installed to take a turbulent structure into a jet. Well-known theoretical concepts and experimental facts give possibility to state that small-scale turbulence has the property of flow stability to excitations. We assumed that this property would act in a jet and provide its stability before expenditure of turbulence energy and prevent appearance of large-scale turbulence. Thus, it will delay the disintegration of a jet and increase a range of its flight.

The analysis of a flow in known fountains with a transparent jet showed that representation of a laminar mode in them is incorrect. We presented a substantiation that special properties of jets are a consequence of a turbulent flow in fountains. This conclusion speaks in favor of the proposed use of turbulence as a tool against vortex formation. However, it is not possibly to apply the technique of creation of a jet in fountains for a high-power pulse water gun.

We proposed a schematic diagram of the pulse water gun with a pneumatic ejection of a water projectile. An obvious problem of combination of a pulse flow with creation of small-scale turbulence is instability of a flow at the initial moment of a pulse. We showed the way of the solution to this problem by the experimental determination of real flow characteristics in a particular water gun design. We offered solutions to the most important technical issues of water gun creation.

Author Biographies

Anatoly Tolkachev, National Academy of the National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

Doctor of Physical and Mathematical Sciences, Professor

Department of fundamental subjects

Iryna Sydorenko, National Academy of the National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

PhD, Associate Professor

Department of fundamental subjects

Ihor Morozov, National Academy of the National Guard of Ukraine Zakhysnykiv Ukrainy sq., 3, Kharkіv, Ukraine, 61001

PhD, Head of Department

Department of Research and Organization

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Published

2018-07-31

How to Cite

Tolkachev, A., Sydorenko, I., & Morozov, I. (2018). The concept of creating a pulse water gun with a large action range. Eastern-European Journal of Enterprise Technologies, 4(5 (94), 45–52. https://doi.org/10.15587/1729-4061.2018.139877

Issue

Vol. 4 No. 5 (94) (2018): Applied physics

Section

Applied physics

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Copyright (c) 2018 Anatoly Tolkachev, Iryna Sydorenko, Ihor Morozov

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