基于Fluent的某转管炮导气孔最佳孔径的研究
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摘要
为了确定某转管炮导气孔最佳的孔径,通过经验法建立气室压力变化规律的理论公式,参照该压力变化规律定义导气室的入口边界并利用Fluent动网格技术模拟导气室一侧的滑板的运动。由于当导气孔孔径超过5 mm以后,火药气体流入导气室产生的回流现象比较严重,所以只研究3、4、5 mm孔径下挡板的压强曲线。根据压强曲线计算出各孔径能够提供的有效转矩分别为97. 5、50. 78、96. 2 N·m。通过样机试验验证,确定选择3 mm的孔径。该研究为内外耦合能源转管炮的设计提供依据。
In order to determine the best aperture of a certain air-guiding hole,this paper first established the theoretical formula of air-chamber pressure with empirical method,and then defined the inlet boundary of the gas chamber according to the pressure variation law and applied Fluent dynamic grid technology to simulate the movement of baffle on the air-chamber. A study was made of the pressure intensity curve of the baffles only under 3,4 and 5 mm because the inverse flow phenomenon of powder gas following into the air chamber is getting worse when the aperture of air-guiding hole exceeds 5 mm.According to the pressure intensity curve,the effective torque of disparate aperture is calculated as97. 5,50. 78 and 96. 2 N·m respectively. Finally,through the experimental verification,the choice of 3 mm aperture was determined,which can provide a basis for the design of the internal and external coupled pipe gudgeons.
In order to determine the best aperture of a certain air-guiding hole,this paper first established the theoretical formula of air-chamber pressure with empirical method,and then defined the inlet boundary of the gas chamber according to the pressure variation law and applied Fluent dynamic grid technology to simulate the movement of baffle on the air-chamber. A study was made of the pressure intensity curve of the baffles only under 3,4 and 5 mm because the inverse flow phenomenon of powder gas following into the air chamber is getting worse when the aperture of air-guiding hole exceeds 5 mm.According to the pressure intensity curve,the effective torque of disparate aperture is calculated as97. 5,50. 78 and 96. 2 N·m respectively. Finally,through the experimental verification,the choice of 3 mm aperture was determined,which can provide a basis for the design of the internal and external coupled pipe gudgeons.
引文
[1]张相炎.火炮自动机设计[M].北京:北京理工大学出版社,2010:20-21.
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[5]宋杰,廖振强,李佳圣,等.导气与枪管浮动混合式自动机动力学特性研究[J].兵工学报,2014,35(6):753-761.
[6]杨臻,薄玉成.内能源转管武器首发启动和变射频分析[J].中北大学学报:自然科学版,1998,24(2):155-157.
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[10]唐家鹏. FLUENT14. 0超级学习手册[M].北京:人民邮电出版社,2013:211-213.
[2]徐亮.某转管机枪建模仿真分析[D].南京:南京理工大学,2011:2-3.
[3]唐亚鸣,廖振强,王晖.新型内能源转管武器驱动技术研究[J].兵工学报,2002,23(2):273-275.
[4]陈杨,廖振强,王涛,等.自动武器喷管气流反推减后坐技术[J].南京理工大学学报:自然科学版,2008,32(6):676-680.
[5]宋杰,廖振强,李佳圣,等.导气与枪管浮动混合式自动机动力学特性研究[J].兵工学报,2014,35(6):753-761.
[6]杨臻,薄玉成.内能源转管武器首发启动和变射频分析[J].中北大学学报:自然科学版,1998,24(2):155-157.
[7]吴海静.某转管机枪导气装置的动力学分析[J].兵工自动化,2009,28(8):4-7.
[8]隋洪涛,李鹏飞,马世虎,等.精通CFD动网格工程仿真与案例实战[M].北京:人民邮电出版社,2013:30-31.
[9]李烁.炮口制退器效率的计算与研究[D].太原:中北大学,2012:33.
[10]唐家鹏. FLUENT14. 0超级学习手册[M].北京:人民邮电出版社,2013:211-213.