【摘 要】
:
The finite volume method based on a multiphase model is adopted to solve the Reynolds-Averaged Navier-Stokes (RANS)equations,which takes into account the effect
【机 构】
:
Department of Mechanics,MOE Key Laboratory of Hydrodynamics
论文部分内容阅读
The finite volume method based on a multiphase model is adopted to solve the Reynolds-Averaged Navier-Stokes (RANS)equations,which takes into account the effects of fluid compressibility,viscosity,gravity,medium mixture and energy transfer of water and combustion gas.The program Fluent User Define Function (UDF) module combined with the dynamic mesh method is employed to simulate the coupling flow field of combustion gas,water field and trajectory of projectile.The results show that the volume of gas cavity at the bottom of projectile and tail pressure will fluctuate after bottom of the projectile leaving the launch tube.The cause of the fluctuation is analyzed and its effects on the trajectory of projectile are presented.The numerical and experimental results agree well with each other.
其他文献
捷联惯导误差标定中考虑的误差主要包括零偏误差、刻度系数误差、安装误差。标定的误差参数越多,难度越大,并且火箭炮在发射标定阶段无线运动,只能进行两自由度角运动,导致误
为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7
The using of the iron to extract reduced iron with TFe≥ 69.5% Al2O3+SiO2<0.3% was studied. Preparation of reduced iron powder in this experimental research can
According to the shearing force character and the deformation coordination condition of shell at the station of supports, the mathematical models to calculate c
An unsteady three-dimensional analysis of the ventilation performance is carried out for different ventilation strategies to find out a ventilation method with
The numerical simulation of the self-propelled motion of a fish with a pair of rigid pectoral fins is presented.A Navier-Stokes equation solver incorporating wi
As a result of the exponential growing rate of worldwide Internet usage, satellite systems are required to support broadband Internet applications. The transmis
Objective:To evaluate the efficacy and safety of nedaplatin/gemcitabine (NG) and carboplatin/gemcitabine (CG) in the management of untreated advanced non-small
The simulation model Tunev(tunnel evacuation) was developed for people’s evacuation in tunnel fire. It contains simple database of the people’s behavioral rea
The front abutment pressure of a fully-mechanized workface of 11061 soft coal isolated island of Liangbei Coal Mine was measured and studied using a self-develo