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M型艇与槽道型艇的阻力和耐波性比较 被引量:12
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作者 黄武刚 《船海工程》 北大核心 2015年第1期56-59,共4页
对高速滑行艇M型与槽道型在相同主尺度下的阻力和耐波性能进行对比,根据模型静水阻力试验结果得到M型中高速阻力相比槽道型均有所减小,且减小值超过10%,随着航速增大(Fr>4时),两者的阻力差值趋增大。不规则波迎浪情况下的耐波性试... 对高速滑行艇M型与槽道型在相同主尺度下的阻力和耐波性能进行对比,根据模型静水阻力试验结果得到M型中高速阻力相比槽道型均有所减小,且减小值超过10%,随着航速增大(Fr>4时),两者的阻力差值趋增大。不规则波迎浪情况下的耐波性试验表明,两种艇型的纵摇、垂荡、艏舯艉垂荡加速度均有明显的差别。如果高速滑行艇采用M型,有望获得更好的耐波性。 展开更多
关键词 M 槽道型 高速滑行艇 阻力 耐波性
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微小型多槽平板热管的流动和传热分析及实验研究 被引量:14
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作者 张丽春 马同泽 葛新石 《中国科学技术大学学报》 CAS CSCD 北大核心 2003年第4期450-459,共10页
对热管内部的流动和传热传质过程建立模型,分析槽道中液体厚度和弯月面的轴向分布,液体和蒸汽的压力、汽 液界面弯月面半径的轴向变化、汽 液界面流动的相互作用以及管壁的轴向导热,通过计算得到热管的外壁面温度分布和传热性能.同时对... 对热管内部的流动和传热传质过程建立模型,分析槽道中液体厚度和弯月面的轴向分布,液体和蒸汽的压力、汽 液界面弯月面半径的轴向变化、汽 液界面流动的相互作用以及管壁的轴向导热,通过计算得到热管的外壁面温度分布和传热性能.同时对一种微小型多槽道平板型铜 水热管进行了性能实验,理论计算和实验数据进行了比较,计算方法得到了实验验证. 展开更多
关键词 微小平板热管 传热性能 界面摩擦 轴向导热 弯月面
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Numerical Investigation on Hydrodynamic Characteristics of a Tunneled Planing Hull in Calm Water
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作者 WANG Hui ZHU Ren-chuan +2 位作者 LI Guo-huan XU De-kang LI Chao-fan 《船舶力学》 EI CSCD 北大核心 2024年第12期1864-1879,共16页
A tunneled planing hull has unique hybrid hydrodynamic and aerodynamic characteristics due to the presence of a tunnel.In this paper,experimental and numerical investigations on hydrody namic analysis of a tunneled pl... A tunneled planing hull has unique hybrid hydrodynamic and aerodynamic characteristics due to the presence of a tunnel.In this paper,experimental and numerical investigations on hydrody namic analysis of a tunneled planing hull are carried out.The resistance tests of models with three dif ferent masses(127.4 kg,159.5 kg,202.9 kg)are conducted for the Froude number in the range of 0.761≤Fn≤1.925.The results of resistance measured by towing tank imply that the tunneled planing hull with a larger displacement has a superior resistance performance.The numerical simulation of Reynolds Average Navier Stokes(RANS)equations based on the finite volume method is performed to analyze the hull characteristics in calm water(M=159.5 kg)with two degrees of freedom(sinkage and trim).The numerical results are compared with the experimental data,which shows good agreement.Pressure distribution,wave profiles and lift forces obtained by SST k-ωand Realizable k-εturbulence models are compared and discussed.Finally,the local fluid flow of streamline around the hull can be divided into four regions due to the presence of a tunnel,which is different from the behaviors of the conventional planing monohull with prismatic form. 展开更多
关键词 tunneled planing hull experimental test overset mesh method pressure distribution lift force
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