不同启动条件下泵喷推进潜艇的瞬态特性研究

郭荣1,王渊1,王晓宇2,李仁年1,李京生1

振动与冲击 ›› 2024, Vol. 43 ›› Issue (15) : 56-62.

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (15) : 56-62.
论文

不同启动条件下泵喷推进潜艇的瞬态特性研究

  • 郭荣1,王渊1,王晓宇2,李仁年1,李京生1
作者信息 +

Transient characteristics of pump-jet propelled submarine under different start-up conditions

  • GUO Rong1, WANG Yuan1, WANG Xiaoyu2, LI Rennian1, LI Jingsheng1
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文章历史 +

摘要

为研究泵喷推进潜艇启动过程中的瞬态特性,基于DES湍流模型对“泵-艇”一体化模型进行全流域非定常数值模拟,采用线性方式进行启动,分析启动时间对泵喷内部及尾流场的影响机理。结果表明:启动过程中,随转速的增加,流量呈线性增长的态势,推力和轴功率呈指数增长;动静叶栅工作面和背面的压差逐渐增大;高涡量区从叶轮叶片前缘和轮毂表面逐渐扩大至整个流道,进口回流逐渐得到一定程度的遏制,漩涡逐渐出现在各个区域;喷流边界从速度梯度不明显且几乎成轴对称分布形态逐渐演变为显著的局部速度梯度且呈“蜿蜒”特性;尾部流场三维涡从启动初期简单的喷管剪切层涡和呈锥体结构的尾涡逐渐演变为由轴心涡、尾流末端涡以及叶片涡系等组成的复杂涡系系统;随启动时间增加,到达相同转速时动静叶栅内部压力整体呈下降态势;喷流尾迹到达的距离越来越长,“蜿蜒”特性更加明显;各涡系结构越来越清晰,尾涡形态产生更加复杂的非规则变化。

Abstract

In order to investigate the transient behavior during the startup phase of pump-jet thruster propelled submarine, a comprehensive full-domain unsteady numerical simulation was performed on an integrated “pump-submarine” model, utilizing the DES turbulence model, a linear startup approach was applied to assess the influence of startup duration on the internal characteristics of the pump-jet propellor and the wake flow field. The result show that, during startup, the flow rate exhibits a linear growth pattern with increasing rotational speed, while thrust and shaft power display exponential growth; furthermore, there is a gradual amplification of pressure differentials between the pressure and suction surfaces of the moving and stator cascades; the high-vorticity region undergoes a transition from being localized around the impeller blade's leading edge and hub surface to encompassing the entire flow channel; inlet backflow is progressively mitigated, and vortices manifest in various regions; the jet boundary shifts from an initial state of inconspicuous velocity gradients and nearly axisymmetric distribution to a conspicuous local velocity gradient with a “sinuous” profile; the three-dimensional vortex system in the wake field evolves from simple shear layer vortices at the jet nozzle and conical-shaped trailing vortices in the early stages of startup to a complex system encompassing core vortices, trailing-end vortices, and blade-generated vortices; with prolonged startup time, there is an overall decrease in pressure within the moving and stator cascades when reaching the same rotational speed; the distance the jet trail extends becomes increasingly extended, and the “sinuous” characteristic becomes more pronounced; the structures of the various vortex systems become more clearly defined, and the form of the tail vortices undergoes complex, irregular variations.

关键词

泵喷推进潜艇 / 启动过程 / 瞬态特性 / 启动条件 / 尾部流场

Key words

Pump-jet propulsion submarine / Starting process / Transient characteristics / Starting conditions / Tail flow field

引用本文

导出引用
郭荣1,王渊1,王晓宇2,李仁年1,李京生1. 不同启动条件下泵喷推进潜艇的瞬态特性研究[J]. 振动与冲击, 2024, 43(15): 56-62
GUO Rong1, WANG Yuan1, WANG Xiaoyu2, LI Rennian1, LI Jingsheng1. Transient characteristics of pump-jet propelled submarine under different start-up conditions[J]. Journal of Vibration and Shock, 2024, 43(15): 56-62

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