Mathematical Model of Gas Bubble around the Outlet of Underwater Ejection Canister for Submarine-launched Missile

doi:10.12382/bgxb.2021.0089

Abstract

Abstract: The gas bubble around the outlet of underwater ejection canister for submarine-launched missile significantly affects the launching safety of missile. Based on the physical mechanisms of expansion-induced depressurization and contraction-induced pressurization of gas bubble，a mathematical model of gas bubble evolution is proposed to analyze the characteristics of bubble loading. The water flow fields are simulated by an incompressible potential flow model and solved by the direct boundary element method. The gas flow fields are calculated by an uniform pressure model. The gas bubble model is validated by comparing with experimental data and numerically simulated results. It is shown that the proposed model can be used to predict the load status of gas bubble for the early stage of missile leaving the launch canister.

Key words: submarine-launchedmissile, underwaterejection, outletgasbubble, mathematicalmodel, boundaryelementmethod

CLC Number:

TJ762.4⁺1

LIU Haotian， FU Debin， BI Fengyang， YANG Huawei， LU Bingju. Mathematical Model of Gas Bubble around the Outlet of Underwater Ejection Canister for Submarine-launched Missile[J]. Acta Armamentarii, 2022, 43(3): 599-604.

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