摘要：在火炮驻退机工程设计过程中，液压阻力系数�1的值反映了其主流流道的结构特征，对�1的选取合理与否是关系到设计成功与否的关键。针对某筒壁沟槽式驻退机，为了确定合理的�1取值范围，对其影响参数，变化规律进行了研究。通过筒壁沟槽式驻退机主流流道特征进行分析，经合理简化，将活塞和活塞杆固定，设定入口边界流速V’模拟驻退杆后坐运动速度V，出口边界为自由流出，在Fluent软件中建立了主流流场等效分析模型，通过仿真得到活塞面受力大小，再由伯努力方程推导出液压阻力系数�1，并以某成熟驻退机为例进行了方法验证。按照该方法，研究了后坐速度V和流道截面积��和�1，其在后坐过程中是动态变化的，随着后坐速度、流道面积减小，在一定范围内逐渐增大。在本文所设计的驻退机结构参数条件下，结合后坐阻力仿真与试验结果对比，�1合理的取值范围在2。9到3.6毕业论文关键词：驻退机；液压阻力系数；流场仿真；后坐阻力25131
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
火炮威力和机动性的矛盾众所周知，而火炮威力越大也使得火炮受力越大，对火炮的结
构提出更高的要求使得火炮机动性下降， 为了适应未来高科技条件下的作战需要，火炮技术 Fluent筒壁沟槽式驻退机流场仿真分析:http://www.youerw.com/jixie/lunwen_18769.html