Fluent筒壁沟槽式驻退机流场仿真分析
Title Flow Field Simulation Analysis of Cylinde Wall Groove Recoil Mechanism
Abstract
Hydraulic resistance coefficient �1,which reflecting mainstream channel
structure characteristic,is a key parameter in artillery recoil mechanism
design.It can be initialized by experience when the chanel structure is
similar,otherwise itmay be different completely,The cylinder wall groove
recoil veloil mechanism is studied in the paper. Forobtaining the reasonable
range of �1 in theoretic design ,theinfluence parameters are studied. Based
on the mainstream chanel structure analysis and reasonable simplification,by
fixing the piston and rod,translating recoil velocity V by inlet velocity
V’and setting free outlet, the equivalent flow field model is set up and
simulated in Fluent.Under the certain condition of inlet velocity v’and the
chanel section area ax, the piston force is calculated. And then,the
coefficient �1 can be deduced from Bernoulli equation.And the method is
validated within a range when V and ax decreace during recoil.Under the
condition of the recoil mechanism parameters in the paper, and based on the
recoil force comparison of simulation and test, the reasonable range of �1
should be 2.9～3.6.
Keywords: recoil mechanism;hydraulic resistance coefficient;flow field
simulation;recoil force
目 次
1 引言 . 1
2 驻退机总体设计及等效流动模型分析 . 2
3 后坐制动诸元计算 . 3
3.1 后坐制动图的选取 3
3.2 自由后坐诸元计算 5
3.3 制动图驻退方程解 6
4 筒壁沟槽式驻退机主流系数分析 9
4.1 流场分析模型尺寸设计 9
4.2 建立流场分析模型并划分网格 11
4.3 应用FLUENT对模型进行仿真 . 13
5 驻退机具体结构设计 . 15
结 论 . 22
致 谢 . 23
参 考 文 献 24
1 引言
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