水下垂直发射航行体多孔排气气泡融合特性研究
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摘要
水下航行体采用多孔排气可有效改善航行体受力特性,多孔排气排出气泡融合特性是航行体受力改善的基础。文章基于空泡独立膨胀原理建立了多孔排气气泡形态理论计算模型,通过试验验证了模型的合理性,并给出了匀速运动时多孔排气气泡融合准则,为排气气泡融合判定奠定了基础。针对初始压比、航行体运动速度、排气孔参数等因素对排气气泡形态影响开展计算,结果表明航行体运动速度在一定范围内越高、相同排气总面积下排气孔数量越多,越有利于排气融合,初始压比对排气融合影响较小。
The characteristics of loads on the underwater vehicle would be effectively improved by air bleed,which would also affect the attitude of the vehicle. Theory model for multi-holes air bleed was established based on the independence principle of the cavity section expansion, and the reliability of the calculated model was proved by the experiment data. The influence of the initial pressure ratio and the veclocity of the vehicle, also including the air bleed parameters were studied for the exhaust bubbles. The results show that bubbles fusion would more easily occur when the veclocity of the vehicle is increased in a certain range,as well as the number of the holes is increased. The initial pressure ratio has little effect on the bubbles fusion.
The characteristics of loads on the underwater vehicle would be effectively improved by air bleed,which would also affect the attitude of the vehicle. Theory model for multi-holes air bleed was established based on the independence principle of the cavity section expansion, and the reliability of the calculated model was proved by the experiment data. The influence of the initial pressure ratio and the veclocity of the vehicle, also including the air bleed parameters were studied for the exhaust bubbles. The results show that bubbles fusion would more easily occur when the veclocity of the vehicle is increased in a certain range,as well as the number of the holes is increased. The initial pressure ratio has little effect on the bubbles fusion.
引文
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[3]Kirschner I N.Implementation and extension of Paryshev’s model of cavity dynamics[C]//Proc.of Super FAST’2008.Saint-Petersburg,Russia,2008.
[4]Vasin A D.The principle of independence of the cavity sections expansion(Logvinovich’s Principle)as the basis for investigation on cavitation flows[C].VKI Special Course on Supercavitating Flows.Brussels:RTO-AVT and VKI,2001:RTO-EN-010(8):105-131.
[5]张阿漫,曾令玉,王诗平,等.水下爆炸气泡融合动态特性研究[J].应用数学与力学,2010,31(2):163-170.Zhang Aman,Zeng Lingyü,Wang Shiping,et al.Study on fusion dynamics of underwater explosion bubbles[J].Applied Mathematics and Mechanics,2010,31(2):163-170.
[6]吕雅琪,聂德明,林建忠.三维双气泡融合的格子Boltzmann模拟[J].计算物理,2015,32(5):553-560.L譈Yaqi,Nie Deming,Lin Jianzhong.Lattice Boltzmann simulation of gas bubble merging in three dimensions[J].Chinese Journal of Computational Physics,2015,32(5):553-560.
[7]程少华,权晓波,于海涛,等.小攻角下航行体三维非定常空泡形态理论预示方法[J].船舶力学,2015,19(8):889-895.Cheng Shaohua,Qüan Xiaobo,YüHaitao,et al.Three-dimensional cavitation shape of the underwater vehicles at a small attack angle in unsteady flow[J].Journal of Ship Mechanics,2015,19(8):889-895.
[8]陈玮琪,王宝寿,颜开,等.空化器出水非定常垂直空泡的研究[J].力学学报,2013,45(1):76-82.Chen Weiqi,Wang Baoshou,Yan kai,et al.Study on the unsteady vertical cavity of the exit-water cavitor[J].Acta Mechanica Sinica,2013,45(1):76-82.
[9]李杰,鲁传敬.潜射导弹尾部燃气后效建模及数值模拟[J].弹道学报,2009,21(4):6-8.Li Jie,Lu Chuanjing.The model of combustion gas bubble of submarine-launched missile and numerical simulation[J].Journal of Ballistics,2009,21(4):6-8.
[10]程少华,权晓波,王占莹,等.水下航行体垂直发射尾部空泡形态与压力预示方法研究[J].水动力学研究与进展,A辑,2015,3:299-305.Cheng Shaohua,Qüan Xiaobo,Wang Zhanyin,et al.Prediction method on trailing cavity shape and pressure of the underwater vehicle in vertical launching[J].Journal of Hydrodynamics,Ser.A,2015,3:299-305.
[11]权晓波,李岩,魏海鹏,等.航行体出水过程空泡溃灭特性研究[J].船舶力学,2008,12(4):545-549.Qüan Xiaobo,Li Yan,Wei Haipeng,et al.Cavitation collapse characteristic research in the out-of-water progress of underwater vehicles[J].Journal of Ship Mechanics,2008,12(4):545-549.