筒壁沟槽式驻退机流场仿真分析
合理的取值范围确定在2。9到3.6关键词：驻退机；液压阻力系数；后坐阻力；流场仿真lf0047
TitleAnalysis on Mainstream Hydraulic Resistance coefficient of Cylinde Wall Groove Recoil Mechanism
Abstract
Hydraulic resistance coefficient
,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 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 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 should be 2.9～3.6.Keywords: recoil mechanism;hydraulic resistance coefficient;recoil force;flow field simulation
1引言 1
2 筒壁沟槽式驻退机结构 1
3流场分析 2
4 筒壁沟槽式驻退机主流系数分析 3
4.1 入流速度和流道面积的影响 3
4.2 试验验证 4
5 结构设计 6
5.1 驻退后坐分析 6
5.2 自由后坐分析与计算7
5.3 驻退机沟槽正面设计 10
结论 17
致谢 18
参考文献19
附录A21
附录B 22
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