Journal of Mechanical Science and Technology

, Volume 31, Issue 4, pp 1683–1691 | Cite as

Flow structure of conical distributed multiple gas jets injected into a water chamber



Based on an underwater gun firing project, a mock bullet with several holes on the head was designed and experimented to observe the combustion gas injected into a cylindrical water chamber through this mock bullet. The combustion gas jets contain one vertical central jet and 4 to 8 slant lateral jets. A high speed camera system was used to record the expansion of gas jets in the experimental study. In numerical simulations, the Euler two-fluid model and volume of fluid method were adopted to describe the gas-liquid flow. The results show the backflow zone in lateral jet is the main factor influencing the gas-liquid turbulent mixing in downstream. On cross sections, the gas volume fraction increased with time but the growth rate decreased. With a change of nozzle structure, the gas fraction was more affected than the shock structure.


Gas-liquid flow Multiple combustion gas jets Experimental study Turbulent mixing Numerical simulation 


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Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjingChina

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