非稳态条件下平板通道内层流速度分布研究  

Study on Unsteady Laminar Velocity Distribution in Plate Channel

作　　者：张川 谭思超[1] 赵佳宁 袁其斌[3] 张虹[4] 

机构地区：[1]哈尔滨工程大学核安全与仿真技术国防重点学科实验室,黑龙江哈尔滨150001 [2]中国原子能科学研究院,北京102413 [3]广东大亚湾核电运营管理有限责任公司,广东深圳518124 [4]中国核动力研究设计院,四川成都610041

出　　处：《原子能科学技术》2014年第1期28-32,共5页Atomic Energy Science and Technology

基　　金：中央高校基本科研业务费专项资金资助项目(HEUCFZ1008);核反应堆系统设计技术重点实验室基金资助项目(KZAKA1101);黑龙江省留学归国基金资助项目(LC2011C18)

摘　　要：针对平板通道内非稳定条件下层流的速度分布特点及阻力特性进行了理论和实验研究。基于非稳态条件下平板通道内的数学模型,分析了初始速度分布、压力梯度变化率、加(减)速时间对瞬时速度分布的影响。结果表明:非稳态层流的速度分布特点与通道尺寸、流体性质、压力梯度变化率和加速时间有关;相同截面平均流速条件下,加速情况下的中心流体速度小于稳态的,且加速流动使沿程流动损失增加,减速流动则恰好相反,实验验证结果与理论分析结果符合良好。T he velocity distribution and resistance characteristics of unsteady laminar flow in plate channels were investigated theoretically and experimentally . Based on mathematical model of unsteady laminar flow , the influences of initial velocity distribution ,pressure gradient rate and duration of acceleration （deceleration ） on the instantaneous velocity distribution were analyzed .The results indicate that the velocity distribution of unsteady laminar flow is affected by channel size , fluid properties , pressure gradient rate and acceleration time . Under accelerated flow condition , the＆amp;nbsp;center fluid velocity is less than steady-state center fluid velocity , the flow resistance increases with the acceleration flow ,and the deceleration flow is on the contrary .The results of experimental verification show that experimental data agree well with the result of theoretical analysis .

关 键 词：平板通道 非稳态流动 压力梯度变化率 速度分布 

分 类 号：TL334[核科学技术—核技术及应用]