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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >UNSTEADY ANALYSIS OF PARTICLE-LADEN GAS FLOWS WHEN HIT BY A MOVING SHOCK WAVE
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UNSTEADY ANALYSIS OF PARTICLE-LADEN GAS FLOWS WHEN HIT BY A MOVING SHOCK WAVE

机译：移动激波对载气时气体流动的非定性分析

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A successful prediction of the thermo-fluid mechanical characteristics of gas and particles is very crucial and imperative for the successful design and operation of rocket nozzles and energy conversion systems. This paper describes an interaction phenomenon when a moving shock wave hits a two-phase medium of gas and particles. A particle-laden gas is considered to be located along a ramp so that numerical integration is accomplished from the tip of ramp for a finite period. For the numerical solution, a fully conservative unsteady implicit 2nd order time-accurate sub-iteration method and a 2nd order Total Variation Diminishing (TVD) scheme are used with the finite volume method (FVM) for gas phase. For particle phase, the Monotonic Upstream Schemes for Conservation Laws (MUSCL) as well as the solution of the Riemann problem for the particle motion equations is used. Transient development of thermo-fluid mechanical characteristics is calculated and discussed by changing the particle mass density and particle specific heat. Major results reveal that when the particle mass density is smaller, there is a stronger interaction between two phases so that the velocity and temperature differences between two phases more rapidly decrease. When the particle specific heat is varied, only a thermal effect (temperature difference between gas and particles) is observed while the other effects (variations of particle concentration and velocity fields) are minor.
机译：成功地预测气体和颗粒的热流体力学特性对于成功设计和运行火箭喷嘴和能量转换系统非常重要且至关重要。本文描述了当移动的冲击波撞击气体和颗粒的两相介质时的相互作用现象。载有颗粒气体的位置被认为是沿着坡道放置的，因此可以在有限的时间内从坡道的尖端完成数值积分。对于数值解，将完全保守的非稳态隐式二阶时间精确子迭代方法和二阶总变差递减（TVD）方案与气相有限体积法（FVM）结合使用。对于粒子相，使用了守恒律的单调上游方案（MUSCL）以及粒子运动方程的Riemann问题解。通过改变颗粒质量密度和颗粒比热来计算和讨论热流体力学特性的瞬态发展。主要结果表明，当颗粒质量密度较小时，两相之间的相互作用更强，因此两相之间的速度和温差会迅速减小。当颗粒比热变化时，仅观察到热效应（气体和颗粒之间的温差），而其他效应（颗粒浓度和速度场的变化）较小。

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