Study on the effect of distance between the two nozzle holes on interaction of high pressure combustion-gas jets with liquid

Xue, Xiaochun; Yu, Yonggang; Zhang, Qi

doi:10.1016/j.enconman.2014.03.039

Cited by 19 publications

(4 citation statements)

References 6 publications

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“…Subsequently, to carry out such an investigation on how to restrain these two kinds of flow instability, they proposed a new research approach that adopts twin combustion gas jets in the jet process and also carried out a series of experimental studies in a sample combustion chamber. They [18,19] present that the twin ignition jets may better complete combustion without reaction "dead ends", and combustion randomness can be suppressed. The effect of the positive feedback mechanism of the Taylor cavity and Helmholtz instability is weakened, and the combustion stability can also be improved.…”

Section: Introductionmentioning

confidence: 98%

Study on the influences of interaction behaviors between multiple combustion-gas jets on expansion characteristics of Taylor cavities

Xue

Zhang

2015

Acta Mech. Sin.

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The purpose of this study is to investigate means of controlling the interior ballistic stability of a bulk-loaded propellant gun (BLPG). Experiments on the interaction of twin combustion gas jets and liquid medium in a cylindrical stepped-wall combustion chamber are conducted in detail to obtain time series processes of jet expansion, and a numerical simulation under the same working conditions is also conducted to verify the reliability of the numerical method by comparing numerical results and experimental results. From this, numerical simulations on mutual interference and expansion characteristics of multiple combustion gas jets (four, six, and eight jets) in liquid medium are carried out, and the distribution characteristic of pressure, velocity, temperature, and evolutionary processes of Taylor cavities and streamlines of jet flow field are obtained in detail. The results of numerical simulations show that when different numbers of combustion gas jets expand in liquid medium, there are two different types of vortices in the jet flow field, including corner vortices of liquid phase near the step and backflow vortices of gas phase within Taylor cavities. Because of these two types of vortices, the radial expansion characteristic of the jets is increased, while changing numbers of combustion gas jets can restrain Kelvin-Helmholtz instability to a certain degree in jet expansion processes, which can at last realize the goal of controlling the interior ballistic stability of a BLPG. The optimum method for both suppressing Kelvin-Helmholtz instability and promoting radial expansion of Taylor cavities can be determined by analyzing the change of characteristic parameters in a jet flow field. B Xiaochun Xue

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Section: Introductionmentioning

confidence: 98%

Study on the influences of interaction behaviors between multiple combustion-gas jets on expansion characteristics of Taylor cavities

Xue

Zhang

2015

Acta Mech. Sin.

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“…The concept of using a stepped-wall structure in the liquid chamber was introduced as a potential mean of controlling the combustion of bulk-loaded liquid propellant [7], and this approach was further developed and tested by experimental and numerical research [8] [9]. Further, the stepped-wall structure in the liquid chamber is also an efficient way to control the plasma-liquid interaction.…”

Section: Introductionmentioning

confidence: 99%

Expansion Characteristics of a Plasma Jet in the Stepped-Wall Chamber Filled with Water

Liu¹,

Yu²,

Mang³

2019

WJET

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The interaction mechanism between the plasma and liquid is a key problem for the electrothermal chemical launch technology. To investigate this problem, a simulated experiment for the expansion process of a plasma jet in the working fluid is carried on. Based on this experiment, a two-dimensional axisymmetric unsteady theoretical model is established to reveal the plasma-liquid interaction flow field pattern. The results show that a typical Taylor cavity forms as the plasma jet expands in liquid. The induction effect of the stepped-wall structure enhances the radial expansion of the plasma jet. An arc-shaped pressure wave is generated at the front of the plasma jet and then evolves into the plane wave. A high-pressure area forms at the head of the plasma jet and then moves downstream. There is a strong plasma-liquid turbulent mixing at the interface, especially near the steps and the nozzle exit area.

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“…On this base, the expansion characteristics of twin gas jet have been discussed in a flat chamber by Yu [14] . Xue [15,16] analyzed the interaction between the twin jets in cylindrical chamber and the effect of the injection structures. And dynamics characteristics in the merging process of the four gas jets in water chamber is experimental discussed by Graaf [17] .…”

Section: Introductionmentioning

confidence: 99%

Study on interaction characteristics between multi gas jets and water during the underwater launching process

Zhou

2017

Experimental Thermal and Fluid Science

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To further understand the mechanism of new submerged water piercing gun launcher, the simulation device of an imitated projectile is designed with using multi combustion gas jets to drain off the water in gun tube. The expansion characteristic of multi gas jets and generation mechanism of the gas-curtain in the liquid medium are experimental observed by a high speed camera. The experiment shows that, with the mixing process between the multi combustion gas jets and the liquid medium, the gas-curtain is generated, which provides a gas path for the projectile motion. On the base of experimental observation result, the influences of injection pressure and sprayer structure on projectile motion are discussed. Experiment result indicates: increasing injection pressure, both axial expansion velocities of gas-curtain and projectile moving speed increase; magnifying the center nozzle cannot enhance the drainage performance of the gas-curtain and will restrain projectile motion in the later stage; with enlarging the oblique plane nozzles, the axial velocity of gas-curtain tend to rise after converging and projectile kinematic performance is also improved.

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Study on the effect of distance between the two nozzle holes on interaction of high pressure combustion-gas jets with liquid

Cited by 19 publications

References 6 publications

Study on the influences of interaction behaviors between multiple combustion-gas jets on expansion characteristics of Taylor cavities

Study on the influences of interaction behaviors between multiple combustion-gas jets on expansion characteristics of Taylor cavities

Expansion Characteristics of a Plasma Jet in the Stepped-Wall Chamber Filled with Water

Study on interaction characteristics between multi gas jets and water during the underwater launching process

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